Sourcing Map Split Cotter Pins - 4mm X 50mm, 304 Stainless Steel, 2-Prong Fastener Clip, Pack Of 5

These split cotter pins are one of those simple but super useful hardware bits. You get 5 pins in the pack, each made from 304 stainless steel, so they're strong, durable, and corrosion-resistant. Size is 4mm in diameter and 50mm long. They have that classic hairpin-style design with two prongs. How they work: you insert the pin through a hole in a bolt or clevis pin, and the bulbous head stops it from pulling all the way through. Then you just bend the two prongs apart to lock it in place. Super secure. They're commonly used with castle nuts, in agricultural machinery, tractors, small engines, lawn mowers, or any general mechanical fastening where you need a reliable, removable lock. Easy to use, no special tools needed. A handy thing to have in your workshop toolbox, garage, or for any DIY repair job involving pins or shafts.