These nuts are standard for all valves and fittings on the market using Upchurch, VICI® compatible, 10-32 thread. They are suitable with the standard 1/16” O.D. tubing. For 1/8’’ O.D. tubing we have our 1/8’’ fine pitch thread nut that require less torque to achieve the sealing of the ferrule and we also have the standard 1/8’’ as well but not recommended. The long type is for situations where the fitting head may be other wise inaccessible or where interference between fittings occur.