Socket Set Screw Head Type Square Point Type Cup System of Measurement Inch Thread Size 1/4 In.-20 Overall Length 1 in Drive Type External Square Drive Size 1/4 in Material Steel Finish Plain Pack Size Small Pack Decimal Equivalent 0.25 in Dimensional Standards ASME B18.6.2 Head Height 0.188 in Head Width 1/4 in Package Quantity 100