Square Wire Lock Pins are a clevis pin with an attached wire loop that is pulled over the end of the pin. The loop at the end of the bent wire slides over the post for simple securing and removal. Pins are square in shape.
Hillman 1/4 in. x 2 in. Wire Round Lock Pin (5-Pack) 882693 - The Home Depot
Hillman 58528 (1/4 x 2) Round Wire Lock Pin, Zinc, 4 Pieces : Industrial & Scientific
Fasteners, Pins
Hillman 1/4 in. x 2 in. Wire Round Lock Pin (5-Pack) 882693 - The Home Depot
Hillman 1/4 in. x 2 in. Wire Round Lock Pin (5-Pack) 882693 - The Home Depot
Pin/Clip Fasteners at
Hillman 3/8 in. x 2-3/4 in. Wire Square Lock Pin (5-Pack) 882697 - The Home Depot
Hillman Specialty Fasteners & Fastener Kits at
Hillman 5/16 in. x 2-3/4 in. Wire Round Lock Pin (5-Pack) 882694 - The Home Depot