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 1/2 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