Machine Screw Head Type Fillister Material Steel Finish Zinc Plated Drive Slotted Thread Size 1/4 In.-20 Fastener Length 3/4 in Head Width 0.414 in Head Height 0.237 in Tensile Strength 60 000 psi Dimensional Standards ASME B18.6.3 Pack Size Bulk Minimum Thread Length 3/4 in Type Standard Machine Screw Washer Thickness - System of Measurement Inch Thread Type Coarse Package Quantity 3000