Product Specification

Stainless Steel Screw & EPQ Wire for Fastener Manufacturing

Product Introduction

TOPONE stainless steel screw wire and EPQ wire are supplied for screw manufacturing, fastener production, cold heading and other wire-forming applications.

Available stainless steel grades include 201, 302, 304, 316 and 304Cu, with a diameter range of 0.15–12mm. The appropriate grade and wire condition can be selected according to the forming process, finished fastener requirements and working environment.

For screw and fastener manufacturers, stainless steel wire selection should consider more than the nominal grade. Wire diameter, mechanical condition, surface condition, forming process and applicable material standard should be defined together.

Product Parameters

Exact mechanical properties, surface condition and available diameter should be confirmed according to the selected grade and production specification.

Stainless Steel Screw Wire for Fastener Manufacturing

Stainless steel screw wire is used as the starting material for different screw and fastener manufacturing processes.

The required wire specification normally includes:

• Stainless steel grade

• Wire diameter

• Mechanical condition

• Tensile strength and hardness

• Surface condition

• Applicable standard

• Cold heading or forming requirements

TOPONE supplies stainless steel wire from 0.15–12mm, allowing different wire sizes to be specified according to screw dimensions and production requirements.

For high-volume fastener production, the wire should be evaluated together with the customer's heading equipment, tooling, lubrication system and forming sequence.

Stainless Steel Grades

201 Stainless Steel Screw Wire

201 stainless steel wire can be considered for screw and formed-wire applications where its corrosion resistance and mechanical characteristics meet the requirements of the working environment.

302 Stainless Steel Wire

302 stainless steel is commonly used for spring and formed-wire applications and can be selected for specific fastener or wire-forming requirements according to the required mechanical condition.

304 Stainless Steel Screw Wire

304 stainless steel is widely used for stainless steel fasteners and formed metal components where a balance of corrosion resistance and forming performance is required.

316 Stainless Steel Screw Wire

316 stainless steel contains molybdenum and can be considered for applications requiring higher corrosion resistance than standard 304 under specific service conditions.

304Cu Screw Wire

304Cu stainless steel wire is suitable for applications where the material specification is intended for forming and fastener production. It can be evaluated for cold heading processes according to the customer's technical requirements.

EPQ Wire for Cold Heading

EPQ wire should be specified according to the actual forming process rather than treated simply as a material grade.

For cold heading and screw production, manufacturers should confirm four key factors.

Wire Diameter

The diameter should correspond to the screw blank, finished dimensions and forming sequence.

Mechanical Condition

Tensile strength and hardness should be compatible with the heading and forming process.

Surface Condition

Bright, matte or soap-coated surfaces may be selected according to tooling, lubrication and wire-feeding requirements.

Material Grade

201, 302, 304, 316 and 304Cu should be selected according to corrosion requirements, forming characteristics and the applicable product standard.

Surface Options

Bright Surface

Bright stainless steel wire provides a clean metallic surface and can be considered where surface appearance and wire condition are important.

Matte Surface

Matte wire can be selected where a non-bright surface condition is preferred or where the surface specification is determined by the subsequent forming process.

Soap-Coated Surface

Soap-coated wire provides a lubricated surface condition that can be considered for forming operations where wire-to-tool friction needs to be managed.

The appropriate surface should be confirmed according to the forming equipment, tooling and lubrication method.

Applications

Screw Manufacturing

Used as raw material for different stainless steel screw manufacturing processes, including forming and heading applications.

Fastener Manufacturing

Suitable grades can be specified for stainless steel nuts, screws, bolts and other formed fastener components according to the required material standard.

Cold Heading

EPQ and suitable stainless steel grades can be evaluated for cold heading according to wire diameter, mechanical condition and forming requirements.

Wire Forming

The wire can also be used for clips, formed-wire components and other precision metal parts.

Industrial Hardware

Selected stainless steel grades can be used for hardware components requiring defined material and dimensional specifications.

Product Advantages

Multiple Stainless Steel Grades

The product range includes 201, 302, 304, 316 and 304Cu, allowing manufacturers to select the material according to application and processing requirements.

0.15–12mm Diameter Range

TOPONE provides stainless steel wire in the 0.15–12mm range for different screw, fastener and wire-forming applications.

Designed Around Processing Requirements

Material grade, diameter, mechanical condition and surface can be specified together to match different forming processes.

Multiple Surface Options

Bright, matte and soap-coated surfaces are available according to the required wire specification and processing conditions.

Suitable for International Specifications

The product can be specified according to AISI, ASTM, DIN, JIS and GB standards where applicable.

How to Select Stainless Steel Screw Wire

1. Confirm the Material Grade

Select 201, 302, 304, 316 or 304Cu according to the required corrosion resistance, forming characteristics and finished-product requirements.

2. Confirm the Diameter

The wire diameter should be matched with the screw blank size, finished dimensions and forming process.

3. Define Mechanical Requirements

Confirm tensile strength, hardness and other mechanical requirements according to the customer's forming equipment and product specification.

4. Select the Surface

Bright, matte or soap-coated wire should be selected according to tooling, lubrication and final surface requirements.

5. Confirm the Standard

Define the applicable AISI, ASTM, DIN, JIS or GB specification before production to avoid differences in material and mechanical requirements.

FAQ

What stainless steel grades are available for screw wire?

TOPONE supplies screw and EPQ wire in 201, 302, 304, 316 and 304Cu grades.

What diameter range is available?

The stainless steel wire range is 0.15–12mm. Exact availability depends on the selected material grade and production condition.

What is stainless steel EPQ wire used for?

EPQ wire is used for applications requiring suitable forming characteristics, including screw, fastener and cold heading production.

Can stainless steel wire be used for cold heading?

Yes. Appropriate stainless steel grades and mechanical conditions can be selected for cold heading according to the screw design, tooling and forming process.

How should I choose between 304 and 316 screw wire?

The choice should be based on the actual working environment, required corrosion resistance, forming requirements and applicable material standard rather than diameter alone.

What surface options are available?

Depending on the specification, stainless steel wire can be supplied with bright, matte or soap-coated surfaces.