CBC-Lok® tube fittings are fully interchangeable with Swagelok® and Parker A-Lok®. Although it is always recommended to use all CBC-Lok® components, intermixing CBC-Lok® bodies and/or component parts with that of other manufacturers will not adversely affect sealing ability. CBC-Lok® Tube Fittings are made to strict quality control standards. CBC-Lok® Tube Fittings are proudly made in the U.S.A.