Product Specification

304Cu Stainless Steel Fastener Wire for Cold Heading | 0.15–12mm

Product Introduction

TOPONE Wire supplies 304Cu stainless steel fastener wire for cold heading and cold forming applications, including screws, bolts, nails, rivets, pins and other stainless steel fasteners.

The wire is available in diameters from 0.15–12mm, with skin-pass, soap-coated and bright surface options. Diameter, tolerance, mechanical condition and surface treatment can be specified according to the customer's forming process and finished component requirements.

For fastener manufacturing, wire selection should consider more than the material grade. Diameter tolerance, mechanical condition, surface treatment, lubrication requirements, forming sequence and applicable standard should be evaluated together.

Product Parameters

Technical Note: Tensile strength, elongation, hardness and dimensional tolerance should be confirmed according to the selected diameter, applicable standard and customer's cold-heading process.

Application Fields

Screw Manufacturing

304Cu stainless steel wire can be used as feedstock for screw production through cold heading and subsequent thread-forming processes.

The starting wire diameter should be selected according to the finished screw dimensions, heading process and material deformation requirements.

Bolt and Stud Manufacturing

For stainless steel bolts and studs, wire grade, diameter, mechanical condition and forming sequence should be considered together.

Nail Manufacturing

304Cu wire can be used for stainless steel nail production where the selected material grade and surface condition meet the requirements of the forming process.

Rivets and Pins

The wire can also be specified for cold-formed rivets, pins and similar fastening components. For parts requiring significant deformation, the component drawing or forming requirements should be provided for technical evaluation.

General Cold-Formed Fasteners

Typical applications include:

• Stainless steel screws

• Stainless steel bolts

• Stainless steel studs

• Stainless steel rivets

• Stainless steel pins

• Stainless steel nails

• Custom cold-formed components

Product Advantages

304Cu Material for Fastener Manufacturing

304Cu stainless steel provides a material option for stainless steel fasteners produced through cold heading and cold forming processes.

The appropriate material condition should be evaluated according to the required deformation, finished component dimensions and applicable material standard.

Skin-Pass Surface Option

Skin-pass processing provides an additional controlled finishing step for the wire.

For fastener production, surface condition should be evaluated together with diameter tolerance, tooling and forming requirements.

Soap-Coated Surface for Cold Forming

A soap-coated surface can provide a lubricating condition for certain cold-forming processes.

Its suitability depends on the customer's dies, lubricant system, forming speed and number of forming stages.

0.15–12mm Diameter Range

The available diameter range of 0.15–12mm covers different stainless steel wire requirements, from small precision fasteners to larger cold-formed components.

The required nominal diameter and tolerance should be confirmed according to the finished part and production process.

Specification-Based Customization

The wire can be specified according to:

• Diameter

• Diameter tolerance

• Mechanical condition

• Surface condition

• Applicable standard

• Coil or spool requirements

• Packaging requirements

304Cu Fastener Wire Selection Guide

1. Confirm the Finished Fastener

Before selecting the wire, confirm:

• Finished diameter

• Head dimensions

• Shank diameter

• Finished length

• Thread requirements

• Forming sequence

• Number of heading stages

These details help determine the appropriate starting wire specification.

2. Select the Wire Diameter

TOPONE Wire supplies 304Cu stainless steel wire in a 0.15–12mm diameter range.

The nominal diameter should be selected according to the finished component and forming process. For precision fasteners, the required diameter tolerance should also be included in the purchasing specification.

3. Confirm Mechanical Requirements

Cold heading involves plastic deformation, so the mechanical condition of the wire is an important selection factor.

Depending on the component design, buyers may need to specify:

• Tensile strength

• Elongation

• Hardness

• Forming condition

These values should correspond to the selected diameter and applicable standard.

4. Confirm Surface Treatment

For wire used in cold forming, surface condition can affect lubrication and interaction with tooling.

The buyer should specify whether the application requires:

• Bright surface

• Skin-pass surface

• Soap-coated surface

The final selection should be checked against the customer's lubricant and forming equipment.

5. Confirm the Applicable Standard

The purchasing specification should identify the required standard, such as:

• ASTM

• JIS

• EN

• DIN

• GB

This provides a clear technical reference for material composition, mechanical properties and inspection requirements.

Quality and Specification Control

For stainless steel fastener wire, terms such as "stable quality" or "consistent performance" should be supported by measurable specifications.

For purchasing and incoming inspection, buyers can define:

For repeat orders, keeping the same grade, diameter, tolerance, mechanical condition, surface treatment and applicable standard provides a clearer technical basis for production consistency.

Frequently Asked Questions

What is 304Cu stainless steel fastener wire?

304Cu stainless steel fastener wire is stainless steel wire used as feedstock for manufacturing screws, bolts, nails, rivets, pins and other cold-formed fasteners.

What diameter range is available?

The specified diameter range is 0.15–12mm. The exact diameter tolerance and mechanical condition should be confirmed according to the customer's application and applicable standard.

What is skin-pass stainless steel wire?

Skin pass is a controlled finishing process applied to the wire after previous processing. It can be used to adjust the surface and dimensional condition according to the agreed specification.

Why is soap coating used on fastener wire?

Soap coating can provide a lubricating surface condition for certain cold-forming processes. Its suitability should be evaluated together with the customer's lubricant, tooling and forming sequence.

Can 304Cu wire be used for screws and bolts?

Yes. 304Cu stainless steel wire can be used as feedstock for cold-formed screws, bolts and other fastener components, subject to the required material specification and forming process.

What information should I provide when requesting a quotation?

For a technical quotation, it is useful to provide:

• Material grade

• Wire diameter

• Diameter tolerance

• Surface condition

• Tensile strength or mechanical requirement

• Finished fastener dimensions

• Forming process

• Applicable standard

• Required quantity

• Coil or spool requirement