Internal Hex, Internal Torx, External Hex, TX, Hex
Metric, Torx, AF, Imperial, SAE
7/16 ", 5.5 mm, 11/16 ", 9/16 ", 3/16 "
1, 1-1/2, 2-1/2, 3/4, 1/2
9.53, 38.1, 25.4, 19.05, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Phosphated, Oxidised, Black Phosphate, Black Oxide