Machine Screw Head Type Fillister Material Nylon Finish Plain Drive Phillips Thread Size 1/4 In.-20 Fastener Length 3/4 in Head Width 0.391 in Head Height 0.203 in Tensile Strength 312 psi Pack Size Small Minimum Thread Length 3/4 in Type Standard Machine Screw Washer Outside Diameter Not Applicable Washer Thickness Not Applicable Maximum Head Width 0.391 in Minimum Head Width 0.391 in Maximum Head Height 0.203 in Minimum Head Height 0.204 in System of Measurement Inch