KT Industries 6-5132 1/4" Female NIpple 1/4" FNPT to 1/4" Male Air Fitting ARO
KT Industries 6-5123 3/8" Female Coupler 3/8 FNPT to 3/8" Air Fitting for Milton
KT Industries 6-5144 1/4" NPT Female Coupler to 1/4" Air Fitting for Lincoln
KT Industries 6-5014 fits Tru-Flate 3/8" Male Coupler 3/8 NPT - 3/8 Air Fitting
KT Industries 6-5221 Brass Female 1/4 NPT Female Coupler Both Side Air Fitting