Machine Screw, Head Type Round, Material Brass, Finish Plain, Drive Slotted, Thread Size 5/16 In.-18, Fastener Length 1 in, Head Width 0.579 in, Head Height 0.216 in, Tensile Strength 60,000 psi, Dimensional Standards ASME B18.6.3, Pack Size Small, Type Standard Machine Screw, Maximum Head Width 0.579 in, Minimum Head Width 0.556 in, Maximum Head Height 0.216 in, Minimum Head Height 0.198 in, System of Measurement Inch, Thread Type Coarse, Package Quantity 25