Hex Bolt

A hex bolt is a threaded fastener with a hexagonal head. It is used to join two or more parts together, usually with a nut and washer.

A hex 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 nut and under the head. A spanner or socket of the matching size sets it.

Zinc plating gives a bright finish and mild corrosion resistance. Hot dip galvanising gives a thicker coating for outdoor use. Black oxide gives a dark finish with light oil protection.

This kind of bolt is often made in steel, alloy steel, stainless steel, brass, or nylon. Steel grades are common for general use. Alloy steel grades are used for high strength.

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 or certificate of conformance if you need traceability. Check the thread, head dimensions, and length against your requirement. Inspect for cracks, thread damage, or coating defects on receipt.