304Cu Stainless Steel Fastener Wire for Cold Heading

Product Introduction

TOPONE Wire supplies 304Cu stainless steel fastener wire for screw, bolt, rivet, pin, and other cold-formed fastener manufacturing applications.

This product is supplied with a skin-passed and soap-coated surface condition, designed for applications where wire surface condition and downstream forming requirements need to be considered together.

The available diameter range is 0.15–12mm, allowing manufacturers to select wire according to fastener dimensions, cold-heading equipment, forming sequence, and tooling requirements.

304Cu is an austenitic stainless steel grade commonly used in cold heading and stainless steel fastener production. For cold-forming applications, the material grade alone is not sufficient for wire selection. Diameter, mechanical properties, dimensional tolerance, surface treatment, lubrication, and forming conditions should also be specified.

Product Specifications

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

Why Choose 304Cu Fastener Wire?

304Cu Grade for Cold-Formed Fasteners

304Cu stainless steel is commonly used in cold heading and fastener manufacturing.

It can be considered for screws, bolts, rivets, pins, studs, and other components that are formed from stainless steel wire.

For demanding forming applications, the grade should be evaluated together with the component geometry, deformation level, forming sequence, and tooling.

Skin-Passed Surface

Skin pass is a controlled finishing operation that can be used to refine the wire surface and dimensional condition after previous processing.

For fastener manufacturing, surface condition should be considered together with wire diameter, tolerance, tooling, and lubrication requirements.

The actual skin-pass reduction and resulting mechanical properties should be specified according to the agreed production standard rather than assumed to be identical for every diameter.

Soap-Coated Surface for Forming Processes

A soap-coated surface can be used where additional lubrication is required during cold heading or related wire-forming operations.

Surface treatment should be matched with the customer's lubricant, dies, punches, forming speed, and number of forming stages.

Before mass production, compatibility between the wire coating and the customer's forming process should be confirmed.

0.15–12mm Diameter Range

TOPONE provides stainless steel wire in a 0.15–12mm diameter range.

This allows manufacturers to select different wire sizes according to finished fastener dimensions and forming requirements.

For precision fasteners, the nominal diameter should always be specified together with the required tolerance.

Applications

Stainless Steel Screw Manufacturing

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

Wire diameter, mechanical condition, surface treatment, and forming sequence should be matched with the screw design.

Bolt Manufacturing

The wire can be processed into stainless steel bolts and studs where the selected material grade and mechanical properties meet the required specification.

Larger bolt dimensions may require specific wire diameter and forming conditions.

Rivets and Pins

304Cu wire can also be considered for cold-formed rivets, pins, and other small stainless steel fastening components.

General Fastener Manufacturing

The material can be specified for various cold-formed fasteners according to component geometry, required properties, applicable standard, and production equipment.

How to Select 304Cu Fastener Wire?

1. Confirm the Fastener Design

Before selecting the wire, confirm:

• Finished component diameter

• Head dimensions

• Shank dimensions

• Finished length

• Thread requirements

• Forming sequence

• Number of heading stations

These parameters help determine the required starting wire diameter and mechanical condition.

2. Select the Wire Diameter

The available diameter range is 0.15–12mm.

The selected diameter should correspond to the finished component design and cold-heading process.

For precision fasteners, diameter tolerance should be included in the purchasing specification.

3. Confirm Mechanical Properties

Cold heading involves substantial plastic deformation. Tensile strength, elongation, hardness, and mechanical condition therefore need to be considered according to the forming process.

For multi-stage heading or components with significant deformation, the wire specification should be reviewed against the actual forming sequence.

4. Confirm Surface Treatment

Skin pass and soap coating should be specified according to the customer's forming equipment and lubrication system.

The surface condition should not be selected independently from the forming process.

5. Confirm the Applicable Standard

The buyer should specify the required ASTM, JIS, EN, DIN, GB, or equivalent material standard.

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

Product Advantages

304Cu Stainless Steel Grade

304Cu provides a stainless steel material option commonly used for cold heading and fastener manufacturing.

Skin-Pass Processing

The skin-pass process provides an additional controlled finishing step for the wire surface and dimensional condition.

Soap-Coated Surface

Soap coating can be specified for cold-forming processes where controlled surface lubrication is required.

0.15–12mm Diameter Availability

The diameter range supports different screw, bolt, rivet, pin, and other fastener dimensions.

Specification-Based Customization

Diameter, tolerance, mechanical requirements, surface treatment, applicable standard, coil requirements, and packaging can be defined according to the customer's production process.

Technical Checklist for Fastener Buyers

For a 304Cu stainless steel fastener wire inquiry, the following information should be confirmed:

Quality and Specification Control

For stainless steel fastener wire, general claims such as “high quality” or “reliable performance” should be supported by measurable specifications.

Important purchasing and inspection parameters may include:

• Material grade

• Chemical composition

• Wire diameter

• Diameter tolerance

• Tensile strength

• Elongation

• Hardness

• Surface condition

• Skin-pass condition

• Soap coating

• Coil weight

• Applicable standard

For repeat production, keeping the same agreed grade, diameter, tolerance, mechanical condition, surface treatment, and standard provides a clear technical reference for subsequent orders.

FAQ

What is 304Cu stainless steel fastener wire?

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

What is the diameter range?

TOPONE supplies this stainless steel wire range from 0.15–12mm. The exact available specification should be confirmed according to the material grade, production process, and required tolerance.

What does skin pass mean?

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 required specification.

Why is the wire soap coated?

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 is commonly considered for cold-formed fasteners including screws, bolts, rivets, pins, and studs.

What information should I provide when purchasing fastener wire?

Provide the material grade, wire diameter, tolerance, surface condition, mechanical requirements, finished component dimensions, forming process, applicable standard, quantity, and packaging requirements.