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Serrated washers increase the friction between the bolt, screw or nut and the mating surface to help prevent loosening under vibration.
In electrical installations the serrations or teeth of the washer dig into the mating surface to provide an electrically conductive assembly.
As with all serrated fasteners the mating surface is scratched or marked during assembly which can, on painted or coated surfaces, increase the risk of corrosion.
| A2 Stainless Steel - Also known as grade 304 or 18/8. A general purpose grade of stainless steel. | |
| A4 Stainless Steel - Also known as grade 316 or 18/8/3. A higher corrosion resistant, marine grade of stainless steel. | |
| Phosphor Bronze - Attractive orange metal normally used in conjunction with brass fasteners. | |
| Bright Zinc Plated (BZP) Steel - Non-stainless standard steel grade offering a basic level of corrosion resistance. | |
| Organic Zinc Flake Coated Steel - Steel parts coated with superior mechanically applied zinc with corrosion resistance lasting 480 hours in the salt spray test. |
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