Machine Screw Head Type Flat Material Steel Finish Zinc Plated Drive Slotted Thread Size 3/8 In.-16 Fastener Length 4 1/2 in Head Width 0.717 in Head Height 0.23 in Tensile Strength 60 000 psi Dimensional Standards ASME B18.6.3 Pack Size Small Type Standard Machine Screw Maximum Head Width 0.717 in Minimum Head Width 0.67 in System of Measurement Inch Thread Type Coarse Package Quantity 50