Socket Head Cap Screw Head Type Standard Material Alloy Steel Black Oxide Finish Thread Size 24 Drive Type Hex Socket Drive Size 5/16 In. Thread Type Fine Thread Style Partially Threaded Thread Direction Right Hand Length under Head 2 In. Thread Length 1-1/4 In. Head Height 3/8 In. Thread Dia 3/8 In. Head Dia 9/16 In. Temp Range -65 Degrees F to 300 Degrees F Rockwell Hardness C39 Min Tensile Strength 180 000 psi Package Quantity 50