Check the listing for details. 2 Pcs M16 x 1.5 Male Thread Internal Hex Head Socket Pipe Fitting Plug (Silver). Condition: New. Listed at 11.11 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 2pcs pipe plugs that measure thread size is M16 x 1.5mm, internal hex width is 8mm / 0.31 inch,overall size is 22 x 17mm / 0.87 x 0.67 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.