Stud

A stud is a length of threaded rod used to join two parts or to hold a fixture with nuts at one or both ends. It can be fully threaded or threaded at both ends only.

A stud joins two parts that are clamped together, often where a bolt is too short or where a through hole is used. It can be threaded at both ends or fully threaded, and it takes nuts and washers of the same thread and class.

Hot-dip galvanising gives a thick zinc coating for outdoor and wet service. Plain finish is bare metal with no coating. PTFE coating is a low-friction layer that helps with assembly and resists chemicals.

Studs are often made in steel, stainless steel 304, stainless steel 316, brass, plastic, or nickel alloys such as 400 nickel. Stainless steel grades resist corrosion, while steel grades suit higher strength needs.

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 a certificate of conformance to confirm the grade and material. On receipt, check the thread form, the length, and that the finish is even.