Hex Head Cap Screw Head Type Hex Diameter 3/8 In. Grade 8 Material Alloy Steel Finish Plain Thread Size 3/8-16 Thread Type Coarse Length under Head 3 In. Thread Length 1 In. Head Height 15/64 In. Head Width 9/16 In. Thread Style Partially Threaded Thread Direction Right Hand Tensile Strength 150 000 psi Rockwell Hardness C33 to C39 Meets/Exceeds SAE J429 ASME B18.2.1 Refills 2EB31 Package Quantity 25