A metal pin used to attach fittings to each other or their mounts.

a pin with a flat head on one end and one or more drilled holes for a cotter pin or a stronger split ring

a type of fastener that allows

a small cylindrically shaped pin used to close shackles or outhaul fittings, or to fasten a turnbuckle to a chain plate.

A pin used to close the opening of a shackle or clevis.

A clevis pin is a type of fastener that will allow rotation of the connected parts about the axis of the pin. A clevis pin consists of a head, shank and hole. The hole passes through the shank at the opposite end of the pin from the head.