Internal Hex, Internal Torx, TX, Hex, External Torx
AF, Torx, Imperial, Metric, SAE
15/16 ", 3/16 ", 5.5 mm, 5/16 ", 1-1/2 "
3/4, 1, 1-1/2, 2-1/2, 3/8
38.1, 9.53, 19.05, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Phosphated, Oxidised, Black Oxide, Black Phosphate