Parker 6-4 B2HF-B Brass Barbed Connector To Male Pipe 3/8" Hose Barb 1/4" Male NPT Adapter for connecting pipes or hoses of different types Connects a hose on one end and a female NPT threaded connection on the other Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability Integral hex nut for using a wrench to tighten the fitting