KQ uni-fit one-touch fittings only require hand tightening to assemble and a snug of the wrench to attain a positive seal in 1/3 of the time of conventional fittings. he innovative design allows use of uni-fit one-touch fittings with NPT NPTF RC(PT) and G(PF) threads making the uni-fit design both versatile and time saving. Product related keywords: KQL12-04S-X12 KQL12-04S-X12#SMC