Machine Screw Head Type Pan Material Nylon Finish Plain Drive Slotted Thread Size 1/4 In.-20 Fastener Length 2 in Head Width 0.5 in Head Height 0.141 in Tensile Strength 312 psi Pack Size Small Minimum Thread Length 2 in Type Standard Machine Screw Washer Outside Diameter Not Applicable Washer Thickness Not Applicable Maximum Head Width 0.5 in Minimum Head Width 0.492 in Maximum Head Height 0.141 in Minimum Head Height 0.144 in System of Measurement Inch