This Dixon PFCW250F thermoplastic cap has 2-1/2" female National Standard Thread (NST) and provides a dust-proof seal. The rocker lugs allow the connection to be tightened using fire equipment tools and the attached chain prevents loss of the cap. The polycarbonate construction provides corrosion resistance and low magnetic permeability.

Hose fittings connect, control, change the direction of, and terminate the flow in piping and hose systems. They are made of brass, stainless steel, galvanized steel, and other materials that resist corrosion, pressure, and wear. Hose fittings have various types of connections, including threaded, barbed, push-to-connect, dry disconnect, and others including those based on internationally-accepted specifications. Hose fittings are used in systems such as air compressors, automatic manufacturing operations, aircraft controls, and tire installation in industries including agriculture, mining, road construction, firefighting, and aviation.

Dixon Valve & Coupling Company manufactures pipe and hose fittings and accessories. The company, founded in 1916, is headquartered in Chestertown, MD.