Dixon DC26S Stainless Steel 303 Air Chief Industrial Interchange Quick-Connect Hose Fitting, 3/8" Coupling x 3/8" NPT Female Air Chief industrial interchange quick connect coupler for connecting directly with a hose with a female NPT end to connect with a male NPT threaded connection Air Chief Industrial interchange quick connect coupler with a female NPT threaded end Valved construction automatically shuts off flow when coupler is disconnected. Stainless steel 303 for better machining characteristics than stainless steel 316 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)