U-Drive Screw, Finish Zinc Plated, Material Steel, Fastener Length 1/4 in, Head Width 0.188 in, Head Height 0.078 in, Head Type Round, Maximum Head Height 0.078 in, System of Measurement Inch, Dimensional Standards ASME B18.6.3, ASME B18.6.4, Drive Type U, Head Material Steel, Package Quantity 1000