The 1-1/2 Brass Countersunk Plug is a high-quality, durable threaded plug designed to seal pipe openings in plumbing, hydraulic, and pneumatic systems. The countersunk design allows for a flush, low-profile installation, making it ideal for applications where a smooth surface is required. Made from high-quality durable brass construction for corrosion resistance and longevity. High-temperature and pressure-resistant for demanding environments.