Brass Countersunk Hex Plug Male 1/2 NPT Threads Pipe Fitting for Air and Water Qty 10 Product highlights Reliable closure for standard 1/2 NPT female ports. Provides a secure threaded seal to cap unused pipe openings in air and water systems. Solid brass construction for mechanical strength and long service life in general plumbing and pneumatic applications. Countersunk hex head allows a flush or near flush finish and easy tightening with a standard wrench or socket. Sold as a pack of 10 so you have spares for maintenance or multiple installations. Why this fitting solves common problems Stops leaks at unused ports: threads into 1/2 NPT female fittings to seal off lines quickly when a port is not needed. Simplifies maintenance: easy to install and remove for testing, servicing, or reconfiguring systems. Durable under routine service: brass resists wear in water and compressed air applications, reducing the need for frequent replacement. Key features and specifications Type: Male hex plug with countersunk head Thread size: 1/2 NPT male (national pipe thread) Material: Brass Quantity: 10 pieces per pack Typical uses: air and water piping systems, general plumbing, pneumatic fittings Practical use scenarios Plumbing: Close off a branch line during repairs or when a fixture is removed, preventing water loss without altering existing piping. Pneumatic systems: Seal unused ports on compressors, valves, or manifolds to maintain system integrity during modification or storage. Equipment servicing: Temporarily cap test ports during pressure testing or to isolate sections of a system for troubleshooting. Installation tips Apply appropriate pipe sealant or PTFE tape to the male threads for improved leak control, then hand start threads to avoid cross threading. Tighten with a wrench on the hex head until snug. Avoid excessive torque to prevent thread damage or deformation of the plug. Inspect threads and seating surface before installation to ensure a clean, leak fit. What you receive Ten brass countersunk hex plugs, male 1/2 NPT threads, ready for installation in air and water piping systems. This fitting is a practical, workready solution for capping 1/2 NPT ports in a wide range of plumbing and pneumatic applications.