Campbell Fittings HAB-2 Brass Steel Hose Fitting, Combination Nipple, 1/2" Hose ID, Threaded NPT Combination nipple for connecting a hose to a pipe or fitting of the same diameter Hose barb on one end and male NPT threads on the other Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability Maximum number of serrations for maximum holding power Formed hex wrench area on 3/4 through 1-1/2 combination nipples for easier installation