Shoulder Screw, Shoulder Screw Type Precision Shoulder Screw, Head Type Standard, Drive Type Socket, Material Stainless Steel, Material Grade/Class 416, Finish Plain, System of Measurement Inch, Thread Size 5/16 In.-18, Minimum Thread Length 1/2 in, Shoulder Length 5/8 in, Shoulder Length Tolerance -0.0 in to +0.002 in, Shoulder Diameter 3/8 in, Shoulder Diameter Tolerance -0.0015 in to +0.0 in, Pack Size Small Pack, Head Height 1/4 in, Head Diameter 9/16 in