These fittings make installation a breeze with a back-up Hex that you can hold while tightening the female JIC nut. • Ideal for factory settings. (Also available in Carbon Steel) • Great choice for use with many chemicals see a list here • For use with both .030 & .040 inch wall thickness. • The Crimp Collar is included. • Remember finger tighten the nut and then ONLY half a turn with a wrench!