Dixon DCB9 Brass Air Chief Industrial Interchange Quick-Connect Air Hose Fitting, 1/2" Coupling x 1/2" NPT Male Air Chief industrial interchange quick connect plug for connecting directly with a hose with a male NPT end to connect with a female NPT threaded connection Air Chief Industrial interchange quick connect coupler with a male NPT threaded end Valved construction automatically shuts off flow when coupler is disconnected. Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability Interchanges with MIL-C-4109F/A-A-59439 specifications for quick-disconnect couplings for hoses and portable pneumatic tools, but not water or fluids, at maximum working pressures up to 232 psi (16 bar)