Internal Torx, External Hex, Hex, TX, External Torx
Imperial, Torx, Metric, AF, SAE
11/16 ", 13/16 ", 3/16 ", 5.5 mm, 9/16 "
3/8, 1/4, 3/4, 1-1/2, 2-1/2
9.53, 25.4, 19.05, 6.35, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Phosphatized, Oxidised, Black Phosphate, Black Oxide