Dixon Valve & Coupling DCP21B Brass Air Chief Industrial Interchange Quick-Connect Air Hose Fitting, Plug, 1/4" Coupling x 1/4" NPT Male (Pack of 10) Air Chief industrial interchange quick connect plug for connecting directly to a hose with a male NPT end to connect with a female NPT threaded connection 1/4" Air Chief industrial interchange quick connect plug with a 1/4" male NPT threaded end Valveless construction allows flow when 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)