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If it needs to turn or it needs to be tightened down, there’s a good chance the fastener is secured with a pin. We carry several types of pins, including customary and DIN 94 metric cotter pins. Standard cotter pins have bendable tines, securing castle nuts and other fasteners. Hammer-lock cotter pins are designed to be hammered into place, which is handy for installation in tight quarters. Hitting the top of the pin forces the lower tine down, spreading both tines and securing the pin. Spring pins slide into holes, fitting flush, so they can’t catch on anything while assemblies are in motion. These are commonly used in axle shafts. Lynch pins with rings are designed to be removed and inserted multiple times. These are mostly used for temporary connections, like trailer hitches. Clevis pins fix sliding assemblies in place. These have a hole at one end, so they can be secured with a lynch pin or a cotter pin.
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