Threads Conform With The American Standard Taper Pipe Thread & Resist Vibration. Fittings Are Offered In A Variety Of Packaging Options, Including: Retail Clam-Shells, Bulk Boxed, And Plastic Tray Assortments. Working Temp (Pressure): -65 Degrees F To 250 Degrees F (1000 Psi).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.