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M8X1.25 Carriage Bolt - A2 Stainless + Black Oxide DIN 603
Carriage bolts have a small square shoulder under the head that fits into a prepared square-bored hole. The self-locking square neck prevents rotation, holding the bolt in place while tightened with a mating nut.
A large, smooth domed head creates a safe finish installation, the absence of a drive socket prevents debris build up.
Also known as Round head square neck bolt or mushroom head bolt.
Material: A2 / SAE Type 304
A2 Stainless carriage bolts 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.
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.
