Tamper Screw, Head Type Flat, Material 18-8 Stainless Steel, Finish Plain, Drive Spanner, Thread Size 1/4 In.-20, Fastener Length 1 1/2 in, Head Width 0.507 in, Head Height 0.153 in, Drive Size #14, Dimensional Standards ASME B18.6.3, Pack Size Small, Type Tamper Screw, Maximum Head Width 0.507 in, Minimum Head Width 0.452 in, System of Measurement Inch, Thread Type Coarse, Package Quantity 25