Hex Head Cap Screw Head Type Hex Diameter 5/8 In. Material 18-8 Stainless Steel Thread Size 5/8-18 Thread Type Fine Length under Head 8 In. Thread Length 1-3/4 In. Head Height 13/32 In. Thread Style Partially Threaded Thread Direction Right Hand Tensile Strength 85 000 to 150 000 psi Rockwell Hardness B80 to C32 Meets/Exceeds ASME B18.2.1 Package Quantity 5