Pin

A pin is a short cylindrical fastener used to hold parts together or to locate them. It can be solid or hollow and often has a head or a hole for a split pin.

A pin holds two or more parts in line, usually through a drilled hole. It can be matched with a matching hole, a cotter pin or a retaining clip where the pin must stay put. A dowel pin locates parts, a taper pin wedges into a reamed hole, and a spring or snap pin flexes to hold its place.

Pins are often made in steel, stainless steel, brass, plastic, or high-nickel alloys. The material choice affects strength and corrosion resistance.

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

Ask for a certificate of conformance or a mill test certificate for the material. On receipt, check the pin diameter, length, and surface for damage.