The Plasson Threaded Plug 5177 (1/2in) is a reliable utility fitting designed to permanently or temporarily seal off unused female BSP threaded ports, valves, or pipeline outlets. It is widely utilized by plumbing, irrigation, and agricultural professionals to cap off auxiliary lines, manifold branches, or components during system testing, maintenance, or reconfiguration.
 
Manufactured from high-grade virgin polypropylene, this threaded plug delivers exceptional impact strength, environmental stress resistance, and complete immunity to rust or corrosion. This durable plastic composition makes it an ideal, long-lasting alternative to traditional metal plugs, ensuring it withstands tough outdoor environments, UV exposure, and aggressive soil chemistry without degrading.
 
Engineered for quick and secure installation, the fitting features precision-molded 1/2-inch male BSP threads that pair seamlessly with compatible valves, adaptors, and equipment. Rated for high working pressures up to 16 bar (PN16) and fully compatible with cold water infrastructure, this trade-quality plug delivers dependable leak resistance when paired with appropriate thread-sealing tape.