Flat Washer
Used to distribute fastener pressure and protect the connecting surface.

Product Introduction
A flat washer is a common fastener accessory, typically installed at the connection of bolts, nuts, or screws, to increase the bearing area, distribute fastening pressure, and protect the surface of the connected parts from damage.
WT Fasteners professionally produces various specifications of flat washers, including standard flat washers, oversize flat washers, thick flat washers, high-strength flat washers, and non-standard custom washers. Products can be provided in different materials, sizes, and surface treatments according to customer requirements, widely used in construction, machinery manufacturing, automotive, power equipment, and industrial assembly fields.
Product Features
1. Increased Bearing Area
Flat washers effectively distribute bolt fastening pressure, reduce surface deformation of connected parts, and improve connection stability.
2. Protection of Connecting Surfaces
During installation, they reduce friction between the nut or bolt head and the workpiece, preventing surface scratches.
3. Precision Dimensional Control
Advanced production processes ensure precise inner diameter, outer diameter, and thickness dimensions, providing a good match with bolts and nuts.
4. Multiple Specifications Available
Support production according to metric and imperial standards, and also offer non-standard customization based on customer drawings or samples.
Product Parameters
Product Name:
Flat Washer
English Name:
Flat Washer / Plain Washer
Common Standards:
- DIN 125
- DIN 9021
- ISO 7089
- ISO 7090
- GB/T 95
Materials:
- Carbon Steel
- Alloy Steel
- Stainless Steel 304
- Stainless Steel 316
- Brass
Grades:
- Grade 4
- Grade 8
- Grade 10
Specification Range:
M2-M100
(Non-standard size customization supported)
Surface Treatment:
- White Zinc
- Yellow Zinc
- Black Zinc
- Hot-Dip Galvanized
- Dacromet
- Black Oxide
- Stainless Steel Natural Finish
Product Types
Standard Flat Washer
Commonly used for ordinary bolt connections, suitable for general machinery and industrial assembly.
Oversize Flat Washer
With a larger outer diameter, it provides a greater support area, suitable for soft materials or large connection parts.
Thick Flat Washer
Increased thickness provides stronger load-bearing capacity, suitable for high-strength connections.
Stainless Steel Flat Washer
Good corrosion resistance, suitable for outdoor, humid, and special environments.
Application Fields
Flat washers are widely used in:
- Construction Engineering
- Steel Structure Installation
- Automotive Manufacturing
- Machinery and Equipment
- Power Equipment
- Furniture Manufacturing
- Industrial Production Lines
- Solar Bracket Systems
Packaging Methods
Provided according to customer requirements:
- Plastic Bag Packaging
- Woven Bag Packaging
- Small Box Packaging
- Carton Packaging
- Pallet Packaging
- Customer Brand Packaging











































