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 5/16 In.-18, Minimum Thread Length 1/2 in, Shoulder Length 3 1/2 in, Shoulder Length Tolerance -0.0 in to +0.005 in, Shoulder Diameter 3/8 in, Shoulder Diameter Tolerance -0.004 in to +0.0 in, Pack Size Small Pack, Head Height 1/4 in, Head Diameter 9/16 in, Tensile Strength 140,000 psi, Shear Strength 10,280 psi