Eaton Weatherhead 202X6 Brass CA360 Inverted Flare Brass Fitting, Adapter, 1/4" NPT Male x 3/8" Tube OD (Pack of 10) Adapts 1/4" NPT male end to 3/8" OD flared tubing female end Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability For use with LP and natural gas, refrigeration, and hydraulic applications