Machine Screw Head Type Truss Material 18-8 Stainless Steel Finish Plain Drive Phillips Thread Size 1/4 In.-20 Fastener Length 1 1/2 in Head Width 0.477 in Head Height 0.15 in Drive Size #3 Tensile Strength 60 000 psi Dimensional Standards ASME B18.6.3 Pack Size Small Minimum Thread Length 1 7/16 in Type Standard Machine Screw Maximum Head Width 0.477 in Minimum Head Width 0.442 in Maximum Head Height 0.15 in Minimum Head Height 0.133 in System of Measurement Inch