How to Brief a Custom Cold Headed Parts Manufacturer Before RFQ

Key takeaways

• A custom cold headed parts manufacturer needs more than a product name and target quantity to prepare a reliable quotation.
• A controlled 2D drawing should normally define dimensions, tolerances, datums, material, heat treatment, finish, threads, and critical characteristics.
• A 3D model is useful for understanding complex geometry, but it should not replace acceptance criteria on the drawing.
• When no drawing is available, a physical sample can support reverse engineering, but the buyer must still confirm material, tolerances, application, and performance requirements.
• Annual demand, order quantity, program life, and delivery frequency can change the recommended tooling and production route.
• Material specifications should include the exact grade and condition rather than only broad descriptions such as “steel” or “stainless steel.”
• Buyers should identify which dimensions are critical to assembly and which dimensions can accept standard forming variation.
• Heat treatment, coating, thread rolling, machining, grinding, cleaning, and inspection must be disclosed before tooling is approved.
• Automotive projects should state PPAP, traceability, control plan, testing, and submission-level requirements at the quotation stage.
• A structured RFQ helps suppliers compare complete cold heading, hybrid forming and machining, or alternative production routes.
• The most useful quotation is not always the fastest quotation. It is the quotation based on clearly defined technical and commercial assumptions.

Introduction

A request for quotation is often treated as a simple purchasing document: send a drawing, state a quantity, and wait for a price. That approach may work for a standard catalog fastener, but it is rarely enough for a non-standard cold-headed component.

A custom cold headed parts manufacturer must determine how the metal will flow, how many dies and punches are required, which dimensions can be formed directly, which features require secondary machining, and how heat treatment or coating may affect the finished component.

Missing information forces the supplier to make assumptions. One manufacturer may assume carbon steel while another assumes stainless steel. One may include heat treatment and automated sorting, while another may quote only the as-formed blank. The resulting prices cannot be compared fairly because the suppliers are not quoting the same product.

A request for quotation is a purchasing process used to request pricing for specified products or services. For custom manufacturing, the quality of the quotation depends heavily on the clarity of those specifications.

This guide explains what engineers and procurement teams should send to a custom cold headed parts manufacturer before requesting a quotation. It also provides a practical RFQ template, a sample-copying workflow, comparison tables, common questions, and a checklist that can be reused for future projects.

What Does a Custom Cold Headed Parts Manufacturer Need?

A custom cold headed parts manufacturer needs enough information to answer four basic questions:

1. What must the component do?
2. What must the finished component look like and measure?
3. How many parts will be required?
4. How will the customer decide whether the parts are acceptable?

These questions connect product design, manufacturing, quality control, and commercial planning.

Product Definition

Product definition identifies the component’s geometry, material, dimensions, tolerances, surface condition, and finished state.

Geometry

The supplier needs to understand the complete external and internal geometry. This includes heads, shafts, flanges, shoulders, recesses, holes, slots, splines, threads, tapers, flats, radii, and special-shaped features.

A partial sketch may be useful for an early discussion, but it is not normally sufficient for final tooling and production approval.

Finished condition

The RFQ should clarify whether the drawing dimensions apply before or after heat treatment, plating, passivation, grinding, polishing, or another finishing process.

A shaft diameter measured before coating may no longer meet the same fit requirement after coating thickness is added.

Functional Definition

The supplier should understand how the component operates in the customer’s assembly.

Application

State whether the part functions as a fastener, shaft, sleeve, bushing, valve component, adjustment part, locking element, electrical contact, structural connector, or load-transmitting component.

This context helps the manufacturer identify the dimensions and properties that deserve the most attention.

Service conditions

Useful service information includes:

• Tensile, shear, impact, or torque load
• Repeated or fatigue loading
• Rotation or sliding movement
• Press-fit or clearance-fit assembly
• Vibration
• Temperature range
• Corrosive exposure
• Contact with chemicals
• Outdoor or marine exposure
• Electrical conductivity
• Required service life

Without application information, a custom cold headed parts manufacturer may reproduce the geometry without understanding the real failure risks.

Commercial Definition

Production volume affects equipment selection, tooling strategy, raw-material purchasing, inspection automation, packaging, and total cost.

Order quantity

The first order quantity indicates the immediate production need. It should not be confused with the total expected demand.

Annual demand

Annual demand allows the manufacturer to evaluate whether dedicated multi-station tooling, automated sorting, or a hybrid process is economically appropriate.

Program life

A component required for five years should be evaluated differently from a one-time replacement order. Lifecycle demand can justify stronger tooling and more automated production controls.

Acceptance Definition

The RFQ should explain how the finished component will be inspected and approved.

Dimensional acceptance

State the required inspection method for important dimensions where relevant. This may include calipers, micrometers, thread gauges, optical measurement, contour measurement, coordinate measurement, or dedicated fixtures.

Functional acceptance

Some features are better evaluated through assembly, torque, pull-out, leak, fatigue, pressure, or cycle testing than through dimensions alone.

A complete acceptance definition helps the custom cold headed parts manufacturer quote the necessary inspection equipment and testing work before production begins.

Why Incomplete RFQs Produce Unreliable Quotations

An incomplete RFQ does not always prevent a supplier from providing a price. It usually causes the supplier to fill information gaps with assumptions.

Those assumptions can make the first quotation appear attractive while creating later increases, delays, or technical disagreements.

Unclear Material

A request stating only “steel part” leaves many possibilities.

Material-grade differences

Low-carbon steel, medium-carbon steel, alloy steel, and stainless steel have different forming behavior, mechanical properties, raw-material costs, heat-treatment routes, and corrosion characteristics.

A custom cold headed parts manufacturer cannot prepare a dependable process plan until the material requirement is defined or the functional requirement is clear enough to support a material recommendation.

Missing Tolerances

A nominal dimension without a tolerance does not establish an acceptable manufacturing range.

Different supplier assumptions

One supplier may apply a general formed tolerance. Another may assume precision machining. A third may ask for clarification before quoting.

The three quotations may look different because they include different production routes.

Unknown Secondary Operations

Cold heading may produce the main geometry, but the finished part may also need:

• Thread rolling
• Drilling
• Turning
• Milling
• Broaching
• Grinding
• Heat treatment
• Plating
• Passivation
• Deburring
• Cleaning
• Sorting
• Special packaging

If these requirements appear after tooling is built, the custom cold headed parts manufacturer may need to revise fixtures, allowances, gauges, and the forming sequence.

Inaccurate Volume

A quotation based on 500,000 parts per year will not reflect the economics of a one-time order for 5,000 parts.

Tooling allocation

Higher lifecycle demand can support more advanced tooling because the investment is distributed across a larger quantity.

Low-volume demand may favor simpler tooling, machining, or a transitional prototype route.

Undefined Quality Documentation

Inspection reports, material certificates, control plans, traceability, capability studies, and PPAP submissions require engineering and quality resources.

If these deliverables are requested only after the purchase order, the supplier may need to change the price and schedule.

Complete RFQ vs Incomplete RFQ

The following comparison shows how RFQ quality affects quotation accuracy.

A well-prepared RFQ does not guarantee that every supplier will quote the same price. It makes the differences easier to understand because each supplier is responding to the same requirements.

What Drawing Should You Send?

The best starting package normally contains a controlled 2D engineering drawing and a 3D model when the geometry is complex.

An engineering drawing is used to communicate how a component functions or is constructed. In manufacturing, it also provides the dimensional and technical information needed to define acceptance.

Controlled 2D Drawing

A controlled drawing is the main technical agreement between the buyer and the custom cold headed parts manufacturer.

Revision number

Every drawing should have a revision number or revision letter. Quotations, sample reports, tooling designs, and production orders should reference the same revision.

Without revision control, the supplier may manufacture an obsolete version of the component.

Units

State whether dimensions are in millimeters or inches.

Do not rely only on the supplier recognizing the drawing format, especially when files are shared internationally.

Scale

The stated scale helps drawing interpretation, but manufacturers should not measure dimensions directly from a printed drawing.

Every important dimension must be written explicitly.

Dimension Presentation

The drawing should describe the component completely without creating contradictory or duplicate dimensions.

Size dimensions

Include diameters, lengths, widths, depths, thread dimensions, radii, chamfers, and angles needed to define the product.

Location dimensions

Define the position of holes, grooves, shoulders, flats, slots, and other features relative to clear references.

ISO 129-1:2018 establishes general principles for presenting dimensions and associated tolerances on technical drawings.

Datums and Geometric Tolerances

Size dimensions alone may not control alignment, position, orientation, straightness, or runout.

Datum references

Datums create a consistent measurement reference. A shaft axis, flange face, bore, or other stable feature may serve as a datum depending on how the component functions.

Geometric controls

Possible controls include:

• Straightness
• Flatness
• Circularity
• Cylindricity
• Parallelism
• Perpendicularity
• Position
• Concentricity where applicable
• Profile
• Runout

ISO 1101:2017 defines the symbol language and interpretation rules used for geometrical specifications of workpieces.

A custom cold headed parts manufacturer should not be expected to decide the functional datum structure without understanding the mating assembly.

3D Model

A STEP, STP, IGES, Parasolid, or another agreed model format can help the manufacturer review complex contours.

What a model does well

A 3D model helps communicate:

• Special external profiles
• Compound radii
• Splines and gear-like forms
• Cavity geometry
• Asymmetric features
• Intersections between features
• Assembly relationships

What a model does not define

A model usually does not show:

• Tolerance limits
• Critical characteristics
• Inspection datums
• Material condition
• Heat treatment
• Surface finish
• Coating thickness
• Acceptance standards
• Packaging requirements

For this reason, a 3D model should normally supplement rather than replace the controlled drawing.

What Material Information Should Be Included?

Material selection affects forming pressure, deformation limits, tool life, heat treatment, corrosion behavior, machining, and final mechanical performance.

Exact Material Grade

Avoid descriptions such as:

• Mild steel
• High-strength steel
• Stainless
• Aluminum
• Copper alloy
• Similar material

These descriptions are too broad for final production planning.

Standard designation

Where possible, provide the material grade according to a recognized standard, together with any permitted equivalent grades.

The RFQ should state whether equivalent materials require written customer approval.

Starting Material Condition

Two wires with the same chemical grade can behave differently if their hardness, annealing, surface condition, or drawing history differs.

Forming condition

The custom cold headed parts manufacturer may need information about:

• Annealed condition
• Spheroidized condition
• Temper
• Hardness range
• Wire coating
• Surface preparation
• Decarburization limits
• Inclusion requirements
• Grain condition

In some projects, the supplier recommends the best starting condition based on the required final properties.

Final Mechanical Properties

State what the finished part must achieve rather than assuming the material name alone guarantees performance.

Common properties

Possible requirements include:

• Tensile strength
• Yield strength
• Proof load
• Hardness
• Case hardness
• Core hardness
• Case depth
• Shear strength
• Impact resistance
• Fatigue life
• Torque performance

The required test method and sampling frequency should also be stated when these properties are critical.

Material Certification

Specify whether a mill certificate, material inspection certificate, chemical-composition report, or independent test report is required.

Traceability level

Clarify whether the certificate must be traceable to:

• Each raw-material coil
• Each production batch
• Each heat-treatment batch
• Each shipment
• Individual serialized components

A custom cold headed parts manufacturer must understand this requirement before defining material control and record retention.

How Should Heat Treatment Be Specified?

“Heat treated” is not a complete technical requirement.

The RFQ should explain the required heat-treatment process, finished properties, and inspection condition.

Heat-Treatment Type

Examples may include:

• Quenching and tempering
• Carburizing
• Carbonitriding
• Induction hardening
• Solution treatment
• Aging
• Stress relieving
• Annealing

The appropriate process depends on the material and application.

Hardness Requirements

Hardness scale

State the required scale, such as HRC, HRB, HV, or another applicable method.

Measurement location

A surface reading, core reading, and cross-sectional reading can produce different results.

The drawing or specification should identify where hardness must be measured.

Case Depth

For case-hardened components, define:

• Effective case depth
• Total case depth where relevant
• Surface-hardness range
• Core-hardness range
• Measurement method
• Test location

A custom cold headed parts manufacturer may need to leave machining or grinding allowance when final dimensions are controlled after heat treatment.

Distortion Allowance

Heat treatment can affect straightness, roundness, diameter, and overall length.

Critical dimensions should state whether acceptance applies before or after heat treatment.

How Should Surface Treatment Be Defined?

Surface-treatment names can cover multiple process variations. A useful RFQ defines the exact performance and dimensional requirements.

Finish Type

Possible finishes include:

• Zinc plating
• Zinc-nickel plating
• Mechanical zinc
• Phosphate
• Black oxide
• Passivation
• Anodizing
• Electroless nickel
• Geomet-type coatings
• Lubricated or waxed finish

The appropriate system depends on the material, environment, assembly method, and customer standard.

Coating Thickness

Coating thickness affects dimensions.

Threads

Excessive coating can reduce thread clearance and cause gauge or assembly problems.

Press-fit diameters

A small increase in diameter may significantly change insertion force.

Slots and holes

Coating buildup can reduce available clearance, particularly in narrow internal features.

The drawing should clarify whether final dimensions and threads are inspected before or after coating.

Corrosion Performance

Instead of saying “good corrosion resistance,” define the required test and acceptance condition.

Possible requirements include:

• Test duration
• White-corrosion limit
• Red-rust limit
• Test standard
• Preconditioning
• Appearance after test
• Functional retesting

Appearance Requirements

Color, gloss, texture, visible marks, rack points, and surface defects may matter for exposed parts.

A custom cold headed parts manufacturer should know whether the component is hidden inside an assembly or visible to the end user.

What Tolerance Information Does the Manufacturer Need?

Tolerances determine whether the main geometry can remain as formed or requires calibration, machining, grinding, or sorting.

General Tolerances

A general tolerance note can cover dimensions that do not have individual limits.

Appropriate use

General tolerances are useful for non-critical dimensions such as:

• Clearance surfaces
• General outside contours
• Non-functional radii
• Overall features with generous assembly space

Risk of overuse

A general tolerance should not replace specific limits on critical fits, sealing diameters, bearing seats, threads, or assembly interfaces.

Critical Dimensions

Identify the dimensions that directly affect:

• Assembly
• Safety
• Sealing
• Rotation
• Alignment
• Torque transfer
• Electrical contact
• Clamp load
• Automated feeding

These dimensions may require special gauges, increased inspection frequency, or a secondary finishing process.

Formed vs Machined Dimensions

A useful drawing can identify which features are expected to be cold formed and which require later machining.

As-formed dimensions

As-formed dimensions depend on tooling, material flow, blank volume, equipment condition, and die wear.

Finished dimensions

Machining, grinding, calibration, heat treatment, and coating may change the final result.

The Cold Heading Tolerance Guide on the Romy Metal website explains how geometry, material, tooling, secondary operations, and inspection methods influence practical tolerance decisions.

Do Not Make Every Dimension Critical

Marking every drawing dimension as critical can increase:

• Tooling complexity
• Machining time
• Inspection time
• Gauge cost
• Sorting
• Rejection risk
• Sample approval time

A custom cold headed parts manufacturer can often suggest where a wider tolerance will not affect function.

What Quantity Information Should Be Shared?

Quantity information should cover development, launch, repeat production, and lifecycle demand.

Prototype Quantity

State how many samples are required for:

• Dimensional review
• Assembly testing
• Destructive testing
• Customer approval
• Pilot production
• PPAP submission
• Retained samples

A single sample may not be enough when several departments or test laboratories require parts.

First Production Order

The first production order helps the supplier plan raw material, machine setup, secondary operations, inspection, and packaging.

Trial production vs regular production

Clarify whether the first order is a launch batch, engineering batch, market-validation batch, or normal production release.

Annual Volume

Annual volume is one of the most important commercial inputs for a custom cold headed parts manufacturer.

It affects:

• Tooling investment
• Machine selection
• Number of tooling sets
• Inspection automation
• Raw-material purchasing
• Packaging automation
• Safety-stock planning
• Unit cost

Batch and Release Frequency

Ten monthly orders of 10,000 pieces may require a different production and inventory strategy from one annual order of 100,000 pieces.

State the expected:

• Release quantity
• Order frequency
• Forecast horizon
• Minimum shipment
• Required safety stock
• Consignment requirement where applicable

Lifecycle Demand

Lifecycle demand is the expected total quantity over the product program.

Why it matters

A custom cold headed parts manufacturer may recommend a more efficient production route when the component has stable, long-term demand.

The comparison between cold heading manufacturing and CNC machining provides further guidance on how production volume affects tooling and process selection.

Can a Supplier Quote From a Sample Only?

A supplier can often prepare an initial assessment from a physical sample, but a sample alone does not provide every requirement needed for controlled production.

What a Sample Can Show

A sample can reveal:

• Overall geometry
• Approximate dimensions
• Surface appearance
• Assembly marks
• Wear locations
• Manufacturing clues
• Possible material family
• Areas requiring special inspection

A sample is particularly useful for discontinued parts, imported assemblies, replacement components, and projects where the original drawing is unavailable.

What a Sample Cannot Confirm

A physical sample does not automatically reveal:

• Original tolerance limits
• Nominal dimensions
• Material specification
• Heat-treatment process
• Coating thickness
• Acceptable surface defects
• Required mechanical properties
• Inspection frequency
• Original process capability
• Expected service life

The measured sample may also be worn, deformed, corroded, coated, or produced near one end of its original tolerance.

Sample Copying vs Drawing-Based Manufacturing

Recommended Sample Replication Process

Step 1: Provide several samples

One sample may contain wear or production variation. Several samples allow the manufacturer to compare dimensions and identify consistent features.

Step 2: Explain where the part is used

Provide photographs or assembly models showing how the part contacts surrounding components.

Step 3: Perform dimensional analysis

The custom cold headed parts manufacturer measures the samples and creates a proposed drawing.

Step 4: Test the material

Testing may include chemical composition, hardness, coating thickness, microstructure, and mechanical properties.

Step 5: Confirm tolerances

The buyer and supplier agree on nominal dimensions, tolerance limits, datums, and inspection methods.

Step 6: Approve the new drawing

The approved drawing becomes the controlled production document.

Romy Metal states that its customization services can begin from customer drawings, physical samples, or matching samples, followed by mold development, trial production, inspection, and mass production.

What Secondary Operations Should Be Disclosed?

Secondary operations can determine whether the main cold-heading process remains economical.

Thread Rolling

The RFQ should identify:

• Thread standard
• Nominal diameter
• Pitch
• Class or tolerance
• Thread length
• Partial or full thread
• Lead-in
• Thread relief
• Inspection gauge
• Coated or uncoated inspection condition

Rolled vs cut thread

External threads on cold-headed parts are commonly rolled because rolling displaces material instead of cutting it.

However, the exact blank diameter and material condition must be planned before tooling approval.

Drilling and Machining

State whether the part needs:

• Axial drilling
• Cross drilling
• Reaming
• Boring
• Turning
• Milling
• Grooving
• Broaching
• Tapping
• Grinding

Machining allowance

The cold-headed blank must contain enough material for the finishing operation without creating unnecessary machining waste.

Calibration and Sizing

Some dimensions may be improved through an additional sizing or calibration operation.

Purpose

Calibration can improve:

• Diameter
• Straightness
• Flat dimensions
• External profile
• Concentric relationship
• Assembly fit

It should be included in the original process plan rather than added after samples fail.

Cleaning

The RFQ should define whether the finished parts must be:

• Oil-free
• Chip-free
• Ultrasonically cleaned
• Passivated
• Dry
• Rust protected
• Clean-room packaged

Cleaning standards can strongly affect cost for hydraulic, valve, electronic, and fluid-system parts.

What Quality Documents Should Be Requested?

Quality-document requirements should match the application risk.

Requesting every possible document for a low-risk component increases administrative work, while requesting too little documentation for an automotive or safety-related part can create approval problems.

Basic Inspection Package

A basic package may include:

• Dimensional inspection report
• Material certificate
• Heat-treatment report
• Coating report
• Certificate of conformity
• Sample identification
• Drawing revision

First Article Inspection

A first article report records measured dimensions from initial samples.

Scope

Clarify whether the report must cover:

• All drawing dimensions
• Only critical dimensions
• One sample
• Several samples
• Every tool cavity
• Every production machine

Process Capability

For stable, repeated production, the buyer may request capability data on selected characteristics.

Critical-characteristic selection

Capability studies should focus on meaningful features rather than every dimension on the drawing.

The customer and custom cold headed parts manufacturer should agree on sample size, study method, and acceptance value.

Control Plan

A control plan describes how key process and product characteristics will be monitored.

It may cover:

• Incoming material
• Cold heading
• Thread rolling
• Machining
• Heat treatment
• Coating
• Final inspection
• Packaging

PPAP Requirements

Automotive projects may require the Production Part Approval Process.

AIAG describes PPAP as the industry standard used to demonstrate that engineering design records and specification requirements are consistently met during an actual production process.

State the submission level

Do not write only “PPAP required.” Specify:

• Customer-specific requirements
• Submission level
• Required elements
• Sample quantity
• Run-at-rate requirement
• Laboratory requirements
• Electronic submission format
• Approval deadline

Clarify responsibility

State who approves:

• Material
• Drawing
• Special characteristics
• Process flow
• FMEA
• Control plan
• Measurement method
• Packaging
• Supplier changes

What Packaging and Logistics Information Matters?

Packaging can affect surface quality, corrosion, counting accuracy, automated feeding, and customer handling.

Package Quantity

Define:

• Pieces per bag
• Bags per carton
• Cartons per pallet
• Maximum package weight
• Minimum shipment quantity

Surface Protection

Cold headed parts may damage one another during transport.

Protection methods

Possible methods include:

• Layer separation
• Individual trays
• Plastic sleeves
• Rust-prevention oil
• VCI packaging
• Desiccants
• Sealed bags
• Protective caps

Labeling

Labels may need to show:

• Customer part number
• Supplier part number
• Drawing revision
• Quantity
• Material lot
• Production batch
• Heat-treatment batch
• Coating batch
• Inspection status
• Manufacturing date
• Country of origin

Delivery Terms

State the expected:

• Delivery location
• Incoterm
• Freight method
• Required lead time
• Release frequency
• Safety stock
• Emergency-order process

A custom cold headed parts manufacturer cannot plan capacity and finished-goods inventory without understanding the delivery model.

RFQ Template for a Custom Cold Headed Parts Manufacturer

The following template can be copied into an email, spreadsheet, or purchasing system.

How to State Annual Volume Correctly

The question “How many pieces do you need?” should not be answered with only one number when the program includes several stages.

Separate Development and Production

A clear volume statement might read:

• Prototype requirement: 50 pieces
• Pilot order: 2,000 pieces
• First production order: 20,000 pieces
• Estimated annual demand: 240,000 pieces
• Typical monthly release: 20,000 pieces
• Expected program life: five years
• Estimated lifecycle demand: 1.2 million pieces

This information gives the custom cold headed parts manufacturer a much stronger basis for tool design and pricing.

Use Realistic Forecast Ranges

When demand is uncertain, provide a low, expected, and high scenario.

The quotation should identify which scenario supports the quoted unit price.

Explain Product Variants

Several similar parts may share:

• Material
• Wire diameter
• Heat treatment
• Coating
• Shaft geometry
• Packaging

A family quotation may allow the manufacturer to evaluate common tooling, shared inspections, or combined raw-material purchasing.

Should You Disclose the Current Manufacturing Problem?

Yes. A custom cold headed parts manufacturer can provide a better recommendation when the reason for changing the current process or supplier is known.

High Machining Waste

If the current component is machined from oversized bar, explain:

• Starting stock size
• Finished part weight
• Machining cycle
• Material loss
• Critical machined features
• Annual volume

The supplier can evaluate whether a near-net cold-headed blank would reduce machining.

Frequent Part Failure

Provide information about:

• Crack location
• Wear location
• Load direction
• Failure frequency
• Service time
• Material
• Heat treatment
• Coating
• Assembly condition

Do not send only a photograph of the failed part without application context.

Assembly Problems

State whether the problem involves:

• Excessive insertion force
• Loose fit
• Thread interference
• Misalignment
• Runout
• Sharp edges
• Coating buildup
• Automated-feeding jams
• Incorrect head orientation

Unstable Supply

A supply problem may involve more than manufacturing capacity.

Explain whether the issue relates to:

• Long tool-repair time
• Raw-material availability
• Outsourced heat treatment
• Coating delays
• Quality sorting
• Forecast changes
• Packaging damage
• International logistics

This helps the custom cold headed parts manufacturer determine which risk controls should be included in the proposal.

How a Manufacturer Reviews the RFQ

A professional review normally includes technical, quality, capacity, and commercial checks.

Step 1: Drawing Review

The supplier examines geometry, dimensions, material, tolerance, threads, and notes.

Missing-information list

The manufacturer should identify unresolved requirements rather than silently assuming them.

Step 2: Forming Feasibility

Engineers consider:

• Starting wire diameter
• Material volume
• Upsetting ratio
• Extrusion direction
• Number of forming stations
• Punch strength
• Die release
• Tooling access
• Crack risk
• Secondary operations

The Custom Cold-Headed Fasteners Guide provides additional information about materials, tolerances, manufacturing methods, and supplier evaluation for made-to-print fasteners.

Step 3: Process Route

The custom cold headed parts manufacturer determines whether the component should be:

• Fully cold headed
• Cold headed and thread rolled
• Cold headed and calibrated
• Cold headed with secondary machining
• Cold headed with grinding
• Produced from a cold-headed preform
• Manufactured through another process

Step 4: Tooling Estimate

The supplier estimates:

• Number of dies
• Number of punches
• Tool materials
• Insert requirements
• Cutting and transfer tools
• Gauges
• Machining fixtures
• Spare tooling
• Development trials

Step 5: Quality Planning

The review identifies:

• Critical dimensions
• Measuring equipment
• Test requirements
• Traceability
• Inspection frequency
• PPAP needs
• Special packaging
• Customer approval points

Step 6: Capacity Planning

The supplier evaluates:

• Machine availability
• Cycle rate
• Tool life
• Secondary-process capacity
• Inspection capacity
• Annual demand
• Peak demand
• Delivery frequency

Step 7: Commercial Quotation

A useful quotation should clearly separate or explain:

• Tooling
• Samples
• Unit price
• Material basis
• Heat treatment
• Coating
• Secondary machining
• Inspection
• Quality documents
• Packaging
• Freight
• Lead time
• Payment terms
• Quotation validity
• Assumptions and exclusions

How Romy Metal Supports Custom RFQ Projects

Romy Metal positions its service around drawing- and sample-based development, in-house mold design, trial production, mass production, inspection, and delivery. Its website lists custom non-standard shafts, sleeves, bushings, valve parts, polygonal components, spline parts, long-rod parts, and other cold-headed products.

Drawing-Based Customization

Buyers can submit a controlled drawing for engineering review.

Process assessment

The review can evaluate whether the component should be completely cold headed or combined with thread rolling, drilling, turning, grinding, heat treatment, and coating.

Sample-Based Development

Physical samples can support projects where the original technical drawing is unavailable.

Specification reconstruction

Measurements and material testing can be used to create a proposed production drawing for customer approval before tooling is finalized.

Product and Application References

Romy Metal’s product range includes automotive gear shafts, door-lock shafts, bleed screws, triangular key shafts, spline shafts, ball-head rods, valve stems, sleeves, bushings, adjustment bolts, and other precision components.

For example, the company’s 304 stainless steel valve stem demonstrates how slotted and two-flat functional geometry may be incorporated into a custom formed component.

Custom Cold Heading Solutions

The custom cold heading solutions section is suitable for projects involving non-standard hollow parts, special-shaped shafts, polygonal forms, splines, long components, or customer-specific geometries.

RFQ Submission

Buyers can send drawings, models, sample photographs, quantities, material requirements, and project information through the Romy Metal contact page. The current contact page is intended for custom fasteners, precision components, and bulk-order inquiries.

Common RFQ Mistakes

Sending Only a Product Photo

A photograph shows appearance but does not define scale, internal geometry, tolerances, material, or acceptance requirements.

Better approach

Send the photo together with a drawing, sample, application explanation, and reference dimensions.

Requesting a Quote Before the Design Is Stable

Early budgetary quotations are useful, but they should not be treated as final production prices.

Better approach

Tell the custom cold headed parts manufacturer which dimensions are still under development and request a preliminary quotation with clearly stated assumptions.

Providing Only the First Order Quantity

This may cause the supplier to recommend a low-volume route even when the lifecycle demand supports cold-heading tooling.

Better approach

Provide prototype, launch, annual, batch, and lifecycle quantities separately.

Using an Old Sample as the Only Standard

An old sample may be worn, corroded, bent, or produced at one tolerance extreme.

Better approach

Provide several samples and approve a new controlled drawing.

Leaving Coating Until the End

Coating can affect threads, diameters, slots, holes, color, corrosion performance, and friction.

Better approach

Define the finish before tooling and gauges are finalized.

Requesting “Best Tolerance”

The tightest tolerance is not automatically the best tolerance.

Better approach

Define the functional need and allow the supplier to recommend an economical manufacturing tolerance.

Asking for PPAP After Sample Approval

PPAP requirements can affect the production run, documentation, gauges, traceability, and schedule.

Better approach

State PPAP expectations in the original RFQ. AIAG treats PPAP as a structured production-approval process intended to demonstrate that design and specification requirements can be met consistently.

Comparing Quotations Without Comparing Scope

One price may include heat treatment, plating, inspection, and packaging while another covers only the cold-headed blank.

Better approach

Create a quotation-comparison sheet listing every included process and deliverable.

RFQ Comparison Checklist

Before selecting a supplier, compare the following items line by line.

Final Pre-RFQ Checklist

Before contacting a custom cold headed parts manufacturer, confirm that the following information is ready.

Technical Files

• Controlled 2D drawing
• Current drawing revision
• 3D model where applicable
• Assembly drawing where useful
• Photographs
• Physical samples where available
• Mating-part information
• Applicable standards

Material and Finish

• Exact material grade
• Permitted equivalent materials
• Starting material condition
• Final mechanical properties
• Heat-treatment specification
• Hardness and case-depth requirements
• Surface-treatment type
• Coating thickness
• Corrosion-test requirement
• Appearance requirement

Dimensions and Inspection

• General tolerances
• Critical dimensions
• Datums
• Geometric tolerances
• Thread specification
• Surface finish
• Measurement methods
• First article requirements
• Capability requirements

Quantities and Timing

• Prototype quantity
• Pilot quantity
• First production order
• Annual demand
• Release quantity
• Program life
• Lifecycle demand
• Target sample date
• Target production date

Quality and Compliance

• Material certificates
• Heat-treatment reports
• Coating reports
• Inspection reports
• PPAP level
• Control plan
• Traceability
• Regulatory requirements
• Customer-specific standards

Packaging and Delivery

• Package quantity
• Surface protection
• Label format
• Pallet requirements
• Delivery location
• Incoterm
• Shipment frequency
• Safety-stock requirements

Conclusion

A reliable quotation for a non-standard component begins with a reliable technical brief.

A custom cold headed parts manufacturer needs to understand the component’s geometry, function, material, finished properties, production volume, inspection method, quality documentation, packaging, and delivery expectations.

The most important RFQ materials are:

• A controlled 2D drawing
• A supporting 3D model
• Exact material requirements
• Heat-treatment and coating specifications
• Clearly identified critical dimensions
• Prototype, annual, and lifecycle quantities
• A complete list of secondary operations
• Quality and PPAP requirements
• Packaging and logistics information
• Application and service-condition details

When no drawing is available, physical samples can support reverse engineering. However, the buyer and manufacturer should create and approve a new controlled drawing before tooling and mass production.

A complete RFQ allows suppliers to quote the same finished component, identify manufacturing risks early, and recommend the right balance of cold heading, machining, thread rolling, heat treatment, finishing, and inspection.

It also helps buyers avoid the most common custom-part problems: hidden quotation assumptions, late price changes, repeated sampling, tool modifications, unclear tolerances, coating interference, and delayed production approval.

FAQ

What information does a custom cold headed parts manufacturer need?

The manufacturer normally needs a controlled drawing, material grade, tolerances, heat treatment, surface treatment, annual quantity, batch size, application, critical dimensions, secondary operations, inspection requirements, packaging, and delivery schedule.

For automotive work, PPAP and traceability requirements should also be stated.

Can a custom cold headed parts manufacturer quote without a drawing?

A preliminary quotation may be possible from a sample, sketch, photograph, or 3D model. However, final tooling and production should normally be based on an approved drawing that defines dimensions, tolerances, material, finish, and acceptance criteria.

Can a supplier copy an existing physical sample?

Yes. A supplier can measure the sample, analyze material and hardness, evaluate the coating, and create a proposed drawing.

Several samples are better than one because they help distinguish intended geometry from wear and normal production variation.

How many samples should I send?

Three to five samples are often more useful than a single sample, although the appropriate number depends on part size, available inventory, testing needs, and whether destructive material analysis is required.

Clearly identify whether the samples may be cut, damaged, or retained by the supplier.

Should I send a 2D drawing or a 3D model?

Send both when possible.

The 3D model helps communicate complex geometry, while the 2D drawing defines tolerances, datums, materials, threads, finishes, and inspection requirements.

Can a custom cold headed parts manufacturer select the material?

Yes, when the buyer provides sufficient functional information.

The manufacturer needs to understand load, temperature, corrosion, assembly, required strength, fatigue, conductivity, and lifecycle expectations before recommending a material.

The final material should be approved by the customer.

How should annual volume be stated?

Separate prototype quantity, pilot order, first production quantity, annual demand, normal release quantity, and expected program life.

When demand is uncertain, provide low, expected, and high forecast scenarios.

Why does the manufacturer need lifecycle volume?

Lifecycle volume helps determine whether dedicated cold-heading tooling and automated inspection are economically justified.

It also supports tool-life planning, capacity planning, raw-material purchasing, and unit-cost calculation.

Should tooling cost and unit price be quoted separately?

Yes. Separate tooling and unit pricing make it easier to understand the one-time and recurring costs.

The quotation should also explain tooling ownership, expected life, maintenance, replacement, revision, and storage conditions.

What does a tooling quotation normally include?

It may include dies, punches, cutting tools, transfer tools, inserts, machining fixtures, gauges, trial runs, and initial samples.

Buyers should ask the supplier to describe the included tooling scope rather than assuming every tool and gauge is covered.

Why does coating need to be specified before quoting?

Coating affects material compatibility, corrosion resistance, friction, appearance, threads, fits, holes, slots, inspection, and packaging.

The custom cold headed parts manufacturer may need to adjust pre-coating dimensions and gauges to achieve the correct final condition.

What if the drawing tolerances are too tight for cold heading?

The manufacturer may recommend calibration, secondary machining, grinding, sorting, or a wider non-critical tolerance.

The buyer should identify the functional requirement so the supplier can propose the most economical solution.

Can cold heading and CNC machining be combined?

Yes. A cold-headed blank can create the main near-net geometry, while machining completes deep holes, cross holes, grooves, bearing seats, sealing surfaces, or other precision features.

This hybrid route can reduce material waste and machining time.

When should PPAP be mentioned?

PPAP should be stated in the original RFQ, not after sample approval.

Specify the submission level, required documents, sample quantity, customer-specific requirements, and approval deadline.

How long does a custom quotation take?

Quotation time depends on geometry, drawing completeness, material availability, secondary processes, inspection requirements, and the need for engineering review.

A complete RFQ can usually be evaluated more efficiently than an inquiry requiring repeated clarification.

What makes one custom cold headed parts manufacturer quotation more reliable than another?

A reliable quotation clearly identifies the material, tooling, process route, secondary operations, inspection, quality documents, packaging, lead time, annual-volume basis, assumptions, and exclusions.

A price without a defined technical scope is difficult to compare and may change later.

What should I do before sending the purchase order?

Confirm:

• Drawing revision
• Approved material
• Tooling scope
• Sample quantity
• Sample approval method
• Unit-price basis
• Annual volume
• Secondary operations
• Quality documents
• Packaging
• Delivery schedule
• Tool ownership
• Engineering-change procedure

The purchase order should reference the same documents and assumptions used for the final quotation.