Hex Head Cap Screw Head Type Hex Diameter 5/8 In. Grade 9 Material Alloy Steel Finish Yellow Zinc Plated Thread Size 5/8-11 Thread Type Coarse Length under Head 1-1/4 In. Thread Length 1-1/4 In. Head Height 15/32 In. Head Width 15/16 In. Thread Style Fully Threaded Thread Direction Right Hand Proof Load 150 000 psi Tensile Strength 180 000 psi Rockwell Hardness C38 to C42 Meets/Exceeds ASME B18.2.1 ASTM F1941 FeZn5C Package Quantity 25