Tapping Sheet Metal Screw Head Type Truss Finish Plain Material 18-8 Stainless Steel Screw Size #4 Fastener Length 1/2 in Head Width 0.257 in Head Height 0.069 in Drive Size #1 Dimensional Standards ASME B18.6.4 SAE J933 Pack Size Small System of Measurement Inch Drive Phillips Package Quantity 100