The Fittings Unlimited Inc 42 Blanking Plug w/OR Light is designed to seal unused ports in various applications. Measuring 42, this blanking plug features an O-ring for enhanced sealing, preventing leaks and ensuring optimal performance. Made from high-quality materials, it offers excellent resistance to corrosion and wear. Its design is suitable for both industrial and residential use, providing reliable sealing in plumbing and hydraulic systems. This blanking plug meets industry standards, ensuring compatibility with a wide range of fittings and systems.