UseUse of supplied safety clip guarantees the fittings are properly connected because the safety pin will not go through the holes in mating fittings until couplings are locked in place. Only one Air King safety clip or wire type retainer is required for each Air King universal coupling.Air King is for air and water service onlySpecificationsAir King meets pressure requirements as specified in A-A-59553 commercial item description superseding Mil Spec.WWC-633D.FeaturesSafety clip includedSupplied with rubber washer, part # AWR4Safety notesAir King is for air and water service onlyNever use any Air King coupling for steam service!The use of an Air King safety clip or wire type retainer is necessary to ensure Air King universal couplings will not become accidentally disconnected.To provide protection against coupling breakage and related hazards, Dixon recommends the use of a whip hose.Pressure rating given at ambient temperature 70°F/21°C