Internal Hex, External Hex, Internal Torx, Hex, TX
Imperial, Torx, AF, Metric, SAE
5.5 mm, 9/16 ", 5/16 ", 5/8 ", 11/16 "
1/4, 1-1/2, 2-1/2, 3/8, 3/4
6.35, 12.5, 19.05, 9.53, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide