Flat washers are flat, circular or square shaped standard fasteners with intermediate holes for bolts or screws to distribute axial loads on fasteners, protect joint surfaces and enhance joint stability. Flat washers are suitable for use with Metric Thread, UNC/UNF threads and custom threaded fasteners.
Flat washers prevent stress concentrations, reduce friction and surface damage, and increase resistance to loosening by increasing the area under stress. It is widely used in assembly and connection systems in machinery, construction, automotive, electric power and home appliance industries, and is a basic functional part in the field of industrial fastening.
Specifications
| Metric sizes | M2 to M160 |
| Internal diameter | 1/4” to 2″ |
| Outside diameter | 5/16” to 3” |
| Strength | grade 4.8 to 8.8; A2-70, A4-80. |
| Material | Carbon steel, aluminum, copper, nylon, etc. |
| Standard | ISO, DIN, UNI, ASME, EN, IFI, NF. |
| Packaging | Plastic box, color box, carton, pallet, or customized packaging. |
Surface Treatment Process
We work with more than 10 surface treatment manufacturers and can provide any surface treatment service.
- Natural color
- Galvanized
- Oxidized blackening
- Nickel plating
- Dacromet
- Electroplated color zinc
- White Plating
- Chrome Plated
- Brass Plated
- Anodized
Flat Washers Standards
| DIN 125 | DIN 34815 | DIN 6916 | ISO 7093.1 | ISO 10669 | BS 4395 | DIN 1440 | ASTM F959 |
| DIN 9021 | DIN 6902 | DIN 134 | ISO 7094 | ISO 10673 | BS 3410 | DIN 433 | UNI 5714 |
| DIN 1052 | DIN 6903 | ISO 7089 | ISO 7415 | ISO 7091 | BS 4320 | DIN 436 | UNI 6592 |
| DIN 1441 | DIN 7349 | ISO 7090 | ISO 7416 | JIS B 1256 | ANSI/ASME B18.2.6 | NF E25-522 | UNI 1750 |
| DIN 7989 | UNI 6593 | ISO 7092 | ISO 8738 | JIS B 1258 | ANSI/ASME B18.22.1 | NF E25-511 | UNI 1734 |
| EN 28738 | DIN 434 | EN 14399 | JIS B 1220 | JIS B 1186 | IFI 542 | DIN 435 | ASTM F436 |
Best Quality Flat Washers Supplier
51Fasteners supplies flat washers in various sizes and materials, we can customize the production according to your drawings, including: thin washers, thick washers, large OD flat washers, small OD flat washers, heavy duty flat washers, fender washers and so on.
Stainless Steel Flat Washer
Copper Flat Washer
Red Steel Paper Insulated Flat Washer
Titanium Flat Washer
Nylon Flat Washer
Features
- Conforms to international standards
- Highly refined surfaces
- Protects connecting surfaces from damage
- Prevents screws from loosening
- Anti-fallout soft material
- Various materials
- Various surface treatments
- Various specifications
Applications
- Automotive
- Construction
- Electrical equipment
- Furniture assembly
- Industrial machinery
- Household appliances
- Marine & Offshore
Processing Service
- Customized Size
- Surface Treatment
- Laser Cutting
- Special Material
- Laser Marking
- Packaging Design
- OEM/ODM
A Trusted Global Supplier of Flat Washers for Industry
51Fasteners has more than 10 years of experience in the fastener industry, ISO 9001 certified, and our products are exported to 50+ countries. We support small batch customization and mass production with stable delivery and reliable quality, and have provided cost-effective fastener solutions for hundreds of customers around the world.
- Flat washer shipped direct from manufacturer
- Standard flat washers in stock
- Sturdy carton + wooden pallet for export
- Support customized drawing
- One-stop solution for fastener industry