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 1/4-20, Minimum Thread Length 7/16 in, Shoulder Length 1 in, Shoulder Length Tolerance +/- 0.005 in, Shoulder Diameter 5/16 in, Shoulder Diameter Tolerance - 0.002 in to - 0.004 in, Pack Size Small Pack, Head Height 7/32 in, Head Diameter 7/16 in, Dimensional Standards ASME B 18.3, Tensile Strength 140, 000 psi