Hard-to-Find Fastener 014973251581 Grade 8 Coarse Hex Cap Screws, 5/16-18 x 1-1/2-Inch, 50-Piece Diameter: 5/16-Inch Length: 1-1/2-Inch Material: Steel Finish: Yellow Zinc Head Style: Hex (1/2 Wrench) Diameter: 5/16" Length: 1-1/2 inch Material: Steel Finish: Yellow Zinc Head Style: Hex (1/2 Wrench)