Shoulder Screw Shoulder Screw Type Precision Shoulder Screw Head Type Standard Drive Type Slotted Material Stainless Steel Material Grade/Class 18-8 Finish Plain System of Measurement Metric Thread Size M3-0.5 Minimum Thread Length 4 mm Shoulder Length 4 mm Shoulder Length Tolerance -0.0 mm to +0.05 mm Shoulder Diameter 4 mm Shoulder Diameter Tolerance -0.013 mm to +0.0 mm Pack Size Small Pack Head Height 3 mm Head Diameter 6 mm Dimensional Standards ASME/ANSI B18.3.3