Internal Torx, External Hex, Hex, TX, External Torx
Imperial, AF, Torx, SAE, Metric
5/16 ", 3/16 ", 5.5 mm, 14 mm, 5/8 "
1/4, 2-1/2, 1/2, 1-1/2, 1
6.35, 25.4, 12.5, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide