Anvil 2119 Forged Steel Pipe Fitting, Class 3000, Half Coupling, 1/8" NPT Female Half coupling for connecting a threaded and unthreaded pipe with the same diameter Female National Pipe Taper (NPT) threads for connecting to male threaded pipes Forged steel for weldability, rust resistance, and durability Class 3000 fitting for use in high-pressure applications Meets specifications ASTM A105 and ASME/ANSI B16.11 for quality assurance