Internal Hex, External Torx, Internal Torx, TX, Hex
Imperial, AF, Metric, Torx, SAE
3/16 ", 5/16 ", 7/16 ", 30 mm, 11/16 "
1-1/2, 1/2, 1/4, 3/4, 3/8
25.4, 9.53, 19.05, 38.1, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Phosphatized, Oxidised, Black Phosphate, Black Oxide