Machine Screw, Head Type Round, Material Steel, Finish Zinc Plated, Drive Slotted, Thread Size 1/4 In.-20, Fastener Length 1 1/2 in, Head Width 0.477 in, Head Height 0.175 in, Tensile Strength 60,000 psi, Dimensional Standards ASME B18.6.3, Pack Size Small, Minimum Thread Length 1 in, Type Standard Machine Screw, Maximum Head Width 0.477 in, Minimum Head Width 0.442 in, System of Measurement Inch, Thread Type Coarse, Package Quantity 100