Dixon 1404-12-12 Zinc Plated Steel Hydraulic Pipe Fitting Adapter, 3/4"-14 NPTF Male x 3/4"-14 NPSM Female Adapter for connecting two different types of pipes or hoses Male National Pipe Taper Fuel (NPTF) threads and female National Pipe Straight Mechanical (NPSM) threads for connecting female pipe to male pipe Zinc-plated steel for strength and corrosion resistance Female NPSM end swivels to prevent hose stress due to twisting Compact design provides ease of assembly in confined areas