Socket Head Cap Screw Head Type Standard Material Alloy Steel Black Oxide Finish Thread Size 8 Drive Type Hex Socket Drive Size 3/4 In. Thread Type Coarse Thread Style Partially Threaded Thread Direction Right Hand Length under Head 3-1/2 In. Thread Length 2-1/2 In. Head Height 1 In. Thread Dia 1 In. Head Dia 1-1/2 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