Stainless Steel Bolt

A stainless steel bolt is a threaded fastener with a hexagonal head, used with a nut to join two or more parts. It is often used where corrosion resistance is important.

A stainless steel bolt clamps two or more parts through a drilled hole. It takes a nut of the same thread and class, and often a washer under the head and nut. It suits outdoor, marine and chemical environments where corrosion resistance matters.

This kind of bolt is often made in stainless steel. Common grades are A2 and A4, which correspond to 304 and 316. A2 suits general outdoor use, while A4 gives better resistance to chlorides and acids.

This is a general guide to checking this kind of part. It says nothing about any supplier's parts.

Ask for a mill test certificate to confirm the grade and mechanical properties. On receipt, check the head markings and thread for damage. Verify the dimensions with a gauge if the fit is critical.