Fitting Nut 1.Size:1/8"--2" 2.Material:stainless steel 304 ... ;4.Technics:Forged;5.Thread Standard:NPT,BSP,G,AN,PT,RP,ISO and etc.6.Applicable medium:oil,gas,water ... is transmitted to tubing during installation. Ferrule Fittings,Stainless steel Nut