Eaton Weatherhead 1110X5 Brass CA360 SAE 45 Degree Flare, Nut, 5/16" Tube OD (Pack of 5) SAE 45-degree flare nut for use with 5/16" OD flared tubing Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability For use with LP and natural gas, refrigeration, and hydraulic applications