Applications Include Oil, Water, Air, & Natural Gas.Brass Long Nipple, 1-1/2 Length, Male (1/4-18 NPT), 1/card Tighten A Minimum Of 2-1/2 Turns After Hand Tightening For Air Tight Seal. Working Temp (Pressure): -65 Degrees F To 250 Degrees F (1000 Psi).