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Also known as plain washers, their purpose is to distribute the fastener's load while reducing heat and friction during the tightening process. They can also be used as spacers. Form A: Normal diameter, normal thickness. Zinc plated fasteners are the most common used plating. This ensures good rust-resisting qualities, appearance and low cost.
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| Product properties | |
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| Brand | Fastbolt |
| Category | Form A |
| Inside Diameter (mm) | 21.0 |
| Outside Diameter (mm) | 37.0 |
| Width (mm) | 3.0 |
| Grade | 4.8 |
| Material | Mild Steel |
| Series | Metric |
| Type | Form A |
| Surface Finish | Zinc Plated |
| Size (mm) | 20 |
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