Shoulder Screw Shoulder Screw Type Standard Shoulder Screw Head Type Truss Drive Type Combination Slotted/Phillips Material Steel Finish Zinc Plated System of Measurement Inch Thread Size 1/4 In.-20 Minimum Thread Length 5/16 in Shoulder Length 1/4 in Shoulder Length Tolerance +/-0.005 in Shoulder Diameter 5/16 in Shoulder Diameter Tolerance -0.004 in to +0.0 in Pack Size Small Pack Head Height 5/32 in Head Diameter 9/16 in Tensile Strength 60 000 psi Package Quantity 25