Machine Screw Head Type Pan Material Nylon Finish Plain Drive Slotted Thread Size #4-40 Fastener Length 1/4 in Head Width 0.219 in Head Height 0.063 in Tensile Strength 41 psi Pack Size Small Minimum Thread Length 1/4 in Type Standard Machine Screw Washer Outside Diameter Not Applicable Washer Thickness Not Applicable Maximum Head Width 0.219 in Minimum Head Width 0.212 in Maximum Head Height 0.063 in Minimum Head Height 0.063 in System of Measurement Inch