Shoulder Screw, Shoulder Screw Type Standard Shoulder Screw, Head Type Standard, Drive Type Socket, Material Alloy Steel, Finish Plain, System of Measurement Inch, Thread Size 1/2-13, Minimum Thread Length 3/4 in, Shoulder Length 2 1/4 in, Shoulder Length Tolerance +/-0.005 in, Shoulder Diameter 5/8 in, Shoulder Diameter Tolerance -0.004 in to +0.0 in, Pack Size Small Pack, Head Height 3/8 in, Head Diameter 7/8 in, Dimensional Standards ASME B18.3, Tensile Strength 140,000 psi