Socket Head Cap Screw Head Type Standard Material Alloy Steel Black Oxide Finish Thread Size 18 Drive Type Hex Socket Drive Size 1/2 In. Thread Type Coarse Thread Style Fully Threaded Thread Direction Right Hand Length under Head 1 In. Thread Length 1 In. Head Height 5/8 In. Thread Dia 5/8 In. Head Dia 1 In. Temp Range - 20 Degrees F to 400 Degrees F Rockwell Hardness HRC 37 to 45 Min Tensile Strength 170 000 psi Meets/Exceeds ASTM A574 ASME B18.3 Package Quantity 25