Machine Screw Head Type Pan Material 18-8 Stainless Steel Finish Plain Drive Phillips Thread Size 1/4 In.-20 Fastener Length 1 in Head Width 0.477 in Head Height 0.175 in Drive Size #3 Tensile Strength 60 000 psi Dimensional Standards ASME B18.6.3 Pack Size Small Minimum Thread Length 31/32 in Type Standard Machine Screw Maximum Head Width 0.477 in Minimum Head Width 0.442 in Maximum Head Height 0.175 in Minimum Head Height 0.162 in System of Measurement Inch