Internal Torx, External Hex, TX, Hex, External Torx
Imperial, AF, Torx, SAE, Metric
11 mm, 5/16 ", 7/16 ", 35 mm, 1-1/2 "
3/4, 1, 1/4, 2-1/2, 1-1/2
38.1, 6.35, 9.53, 19.05, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Phosphated, Oxidised, Black Phosphate, Black Oxide