Detail & Specs
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Stainless Steel + Black Oxide / Coarse Thread Acorn Nuts
Acorn nuts are used to cover and protect exposed threads. Stainless acorn nuts are commonly used in damp environments for corrosion resistance, popular across a wide range of industries: automotive, motorsport, industrial machinery, architectural finish work, agriculture, food processing, clean energy, etc.
Material: Stainless Steel
Suitable for damp locations
Corrosion resistant
Finish: Black Oxide
- Abrasion resistant, does not peel, chip or rub off
- Reduces friction, prevents galling
- Does not change the strength of the stainless steel
- Practically no dimensional change to base fastener
- The spray applied during the coating process wears off over time, revealing an attractive matte black finish
The black oxide coating per MIL-DTL-13924, Class 4 on 300 series corrosion resistant steel meets 96 hours of resistance in a 5% salt spray (fog) test in accordance with ASTM B117. We recommend using stainless steel installation tools to prevent extraneous rust.
For any application involving marine (salt water), use A4 / 316 Stainless Steel material, available as a special order.
Also known as dome nut, hexagon domed cap nut.
Special Order Variations
Additional Sizes: M30, M33, M36
Additional Materials: A4 Stainless Steel
