Eaton Aeroquip 2046-8-8S Steel Pipe Fitting, Adapter, 1/2" NPSM Female x 1/2" NPT Female National Pipe Straight Mechanical (NPSM) female adapter for connecting a pipe to a National Pipe Thread (NPT) male Female NPSM threads on one end and female NPT threads on the other end for connecting two threaded pipes Steel for weldability and greater resistance to rust than iron Standard duty for light to medium pressure applications Society of Automotive Engineers (SAE)-compliant for SAE standards J512, J513, J514, J1926 and J1453 for functional requirements