Internal Hex, External Hex, Internal Torx, Hex, TX
Metric, Torx, Imperial, AF, SAE
9/32 ", 1 ", 11/16 ", 7/16 ", 10 mm
1/4, 3/4, 2-1/2, 1-1/2, 3/8
38.1, 25.4, 9.53, 6.35, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Phosphatized, Oxidised, Black Phosphate, Black Oxide