Check the listing for details. 3 Pcs 7/16-20UNF Pipe Plug,for Terminate Pipe Ends (Silver). Condition: New. Listed at 15.78 USD. MULTIPURPOSE - These plugs are designed to effectively seal openings in machinery, fittings, or pipes, including intake manifold ports, pump ports, and engine jack holes. They are suitable for use in headers, ships, industrial piping systems, and the ends of swimming pool pipes. WHAT YOU GET - The package comes with 3pcs pipe plugs that measure thread size is 7/16-20UNF, overall size is 14 x 12mm / 0.55 x 0.47 inch (D*H).RELIABLE MATERIAL - Constructed from 45# steel, this product offers exceptional durability and corrosion resistance, making it suitable for long-term applications. Equipped with sealing rings, its precision engineering ensures high sealing performance, thereby providing reliable protection for your piping system.