CLEVIS PIN

Clevis Pins are a type of fastener that will allow the rotation or swivel of the connected parts about the axis of the pin linkage. A clevis pin, sometimes referred to as a link pin or hinge pin, consists of a head, shank and cross drilled hole or groove. When using a fastening, such as a clevis pin, the hole or groove which is at the opposite end of the pin to the head is inserted through the items to be linked, and then a cotter pin, R clip, Circlip or similar retaining fastener is inserted through the hole or set in groove to fix the clevis pin in place. 
 

Like a set screw, a clevis pin is often used to prevent two other pieces from moving relative to each other, A clevis pin is less adjustable, in that it can hold two parts in exactly one relative position (because holes must be drilled in both parts) A clevis pin is also more secure, as it is less apt to work loose due to vibration., this is why clevis pins are often found in agricultural machinery. Clevis Pins are currently supplied in metric sizes to ISO 2341:1986 or DIN 1444, in stainless steel, Mild steel and bright zinc coated steel.