Koch Industries 4022323 Wire Hair Pin Clip, 1/8 x 2-1/16-Inch, Yellow Zinc Plated, 10-Piece Fastener used to prevent a wheel or other rotating part from sliding off the axle upon which it is riding Fits shaft diameter 1/2 - 3/4-inches Commonly used with clevis pins and shafts Pins comes in poly bag Yellow zinc plated