Flat Washer (SS) Supplier
High-quality Stainless Steel Flat Washer. Standard flat washer with wide bearing surface. Size range M2-M36. Factory direct pricing with ISO 9001 certification.
Quick Specifications
Material
Stainless Steel
Type
Standard flat washer
Size Range
M2–M36
Surface Finish
Natural / Polished
Grade
A2 (SS304) / A4 (SS316)
Product Overview
Stainless steel flat washers provide excellent corrosion resistance and are ideal for applications exposed to moisture, chemicals, or saltwater environments. They distribute the load of a bolt or screw head evenly across the surface being fastened.
Our stainless steel flat washers are manufactured to DIN 125 / ISO 7089 standards in A2 (SS304) and A4 (SS316) grades. A2 offers general corrosion resistance, while A4 provides superior resistance to chlorides and marine environments.
All products comply with international standards including DIN 125, ISO 7089, and GB/T 97.1, ensuring reliable performance in corrosive and hygienic applications.
Dimensional Specifications
DIN 125 / ISO 7089 Standard – Stainless Steel Flat Washers
| Thread Size | Inner Dia. d (mm) | Outer Dia. D (mm) | Thickness s (mm) | Standard |
|---|---|---|---|---|
| M2 | 2.2 | 5 | 0.3 | DIN 125A |
| M3 | 3.2 | 7 | 0.5 | DIN 125A |
| M4 | 4.3 | 9 | 0.8 | DIN 125A |
| M5 | 5.3 | 10 | 1.0 | DIN 125A |
| M6 | 6.4 | 12 | 1.6 | DIN 125A |
| M8 | 8.4 | 16 | 1.6 | DIN 125A |
| M10 | 10.5 | 20 | 2.0 | DIN 125A |
| M12 | 13.0 | 24 | 2.5 | DIN 125A |
| M16 | 17.0 | 30 | 3.0 | DIN 125A |
| M20 | 21.0 | 37 | 3.0 | DIN 125A |
| M24 | 25.0 | 44 | 4.0 | DIN 125A |
| M30 | 31.0 | 56 | 4.0 | DIN 125A |
| M36 | 37.0 | 66 | 5.0 | DIN 125A |
Material Grades & Mechanical Properties
Stainless Steel Flat Washers – Mechanical Properties
| Grade | Hardness (HB) | Tensile Strength (MPa) | Corrosion Resistance | Applications |
|---|---|---|---|---|
| A2 (SS304) | 150-210 | 500-700 | Good – general atmosphere | Food processing, architecture |
| A4 (SS316) | 160-220 | 520-720 | Excellent – marine/chemical | Marine, chemical, medical |
| A2 (SS304) Polish | 140-190 | 500-700 | Good – hygienic surface | Food & beverage, pharma |
Surface Treatment Options
Choose the right finish for your application environment
Natural Finish
Standard mill finish stainless steel surface. Good corrosion resistance for general applications.
- Standard corrosion resistance
- Cost-effective
- General purpose
Polished Finish
Mirror-like polished surface for hygienic and aesthetic applications. Easy to clean and maintain.
- Hygienic surface
- Easy to clean
- Aesthetic appearance
- Food grade
Passivated
Chemical passivation treatment for enhanced corrosion resistance. Removes free iron from surface.
- Enhanced corrosion resistance
- Removes surface contaminants
- Extended service life
Applications
Food & Beverage Food & Beverage
Food processing, dairy, brewing equipment
Marine Marine
Boats, ships, offshore platforms, dock hardware
Medical Medical
Medical equipment, surgical instruments, clean rooms
Architecture Architecture
Curtain walls, facades, decorative installations
Chemical Chemical
Chemical processing, storage tanks, pipelines
Solar Energy Solar Energy
Solar panel mounting, renewable energy systems
Quality Assurance
ISO 9001 Certified
Strict quality management system
Material Certificates
EN 10204 3.1 certificates available
100% Inspection
Dimensional and visual inspection
Professional Packaging
Carton, bag, pallet options
Need Stainless Steel Flat Washers?
Factory direct pricing, MOQ from 1 piece, fast delivery worldwide.