Internal Torx, Internal Hex, External Hex, TX, Hex
Metric, Torx, AF, Imperial, SAE
7/16 ", 9 mm, 11/16 ", 15/16 ", 5 mm
1-1/2, 2-1/2, 1, 3/8, 1/2
38.1, 25.4, 6.35, 9.53, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Phosphatized, Oxidised, Black Phosphate, Black Oxide