Dixon Valve BN251 Brass Hose Fitting, Male Insert, 1/8" NPTF Male x 5/16" Hose ID Barbed Male insert for connecting a hose to a female threaded connection Hose barb on one end and NPTF male threads on the other Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability Barbed fitting for a tight seal on hoses and NPTF threads for a tighter seal than straight threads