Page XX AIR FITTINGS Page 103 AIR FITTINGS UNIVERSAL MALE COUPLER Universal (U) 1/4” coupler with 1/4” male national pipe thread (NPT) connection. Steel construction, 300 PSI max pressure, for compressed air only. Works with Tru-Flate®, Industrial/Milton®, and ARO® style plugs. Does not work with Lincoln® style plugs. MODEL DESCRIPTION 28040 Universal 1/4” x 1/4” Male NPT Coupler 28118 Universal 1/4” x 1/4” Male NPT Coupler, Bulk ARO® STYLE FEMALE PLUG ARO® (A) style 1/4” plug with 1/4” female national pipe thread (NPT) connection. Steel construction, 300 PSI max pressure, for compressed air only. MODEL 28036 ARO® STYLE MALE COUPLER ARO® (A) style 1/4” coupler with 1/4” male national pipe thread (NPT) connection. Steel construction, 300 PSI max pressure, for compressed air only. MODEL 28037 ARO® STYLE FEMALE COUPLER ARO® (A) style 1/4” coupler with 1/4” female national pipe thread (NPT) connection. Steel construction, 300 PSI max pressure, for compressed air only. MODEL 28038 ARO® STYLE PLUG AND COUPLER SET ARO® (A) style 1/4” plug and coupler with 1/4” national pipe thread (NPT) connections. Steel construction, 300 PSI max pressure, for com- pressed air only. MODEL 28039