U型夾銷

I've been using it to secure our swing set's chains, and the metal feels solid and durable. The pin slides in easily but holds tight once locked—does exactly what it needs to for a few bucks.

Ordered this after losing the original during a swing set teardown and it fit perfectly into the existing bracket. The metal feels sturdy and the pin slides through smoothly, so reassembly took less than ten minutes. Solid, no-nonsense part that does exactly what it's supposed to.

My swing was wobbling so bad I thought the whole frame was about to give, but this clevis key locked the pins in place and now it’s solid as a rock. The metal feels sturdy enough to handle daily use, and it took me less than five minutes to swap out the old one.