Interlocking teeth help these pins resist sliding when exposed to vibration. They have a slot that presses closed when the pins are inserted so they don't flex after installation.

These spiral pins remain flexible after installation, so they absorb shock and vibration better than slotted spring pins. They work well in holes that are out of round.

Also known as hitch pin clips and R-clips, these pins are easy to install and remove.

These pins are coiled for more tension than standard wire-snap cotter pins.

For parts that spin or are otherwise difficult to access, slide these pins in and tap them with a hammer for a temporary hold. Reposition work, then bend the prongs outward to secure.

The double-head design lets you push or pull these pins from either side of the hole. Once in place there's little chance they will be vibrated out or knocked off.

An extra loop locks these cotter pins more securely than other pins, so they can't vibrate out or be knocked off.