Machine Screw Head Type Truss Material 18-8 Stainless Steel Finish NL-19 Drive Phillips Thread Size 1/4 In.-20 Fastener Length 3/4 in Head Width 0.573 in Head Height 0.15 in Drive Size #3 Dimensional Standards ASME B18.6.3 Pack Size Small Minimum Thread Length 3/4 in Type Standard Machine Screw Maximum Head Width 0.573 in Minimum Head Width 0.546 in Maximum Head Height 0.15 in Minimum Head Height 0.133 in System of Measurement Inch Thread Style Fully Threaded