Hard-to-Find Fastener 014973231095 Carriage Bolts, 5/16-18 x 8, Piece-67 Diameter 1: 5/16 inches Diameter 2: 23/32 inches Length: 8 inches Material: Steel Finish: Zinc Diameter: 5/16" Length: 8 Inch Material: Steel Finish: Zinc Head Style: Carriage