Parker's Prestolok PLP and PLN* is a one piece push-to-connect brass fitting for low pressure pneumatic circuits, where assembly or disassembly and reassembly is important. PLP designates nickel plated brass body, PLN designates brass body without nickel plating. A stainless steel grab ring grips the tubing to provide retention. Swivels are featured on all male pipe threaded shapes for installation in tight places and for precise positioning. The fittings are corrosion resistant, with a pre-applied thread sealant and nitrile D-seal.