5/16" x 1-3/4" Plain Steel Tension Pins TNPN-199 (8 pcs.)

Diameter: 5/16"
Length: 1-3/4"
Material: Steel
Finish: Plain
Type: Tension Pin

Box of 8.

A tension pin is similar to a cotter pin, but it has very little play and is better able to withstand side loads and rotational friction.