Check the listing for details. 3/8 NPT Male Outer Head Hex Thread Socket Pipe Plug Fitting, 5Pcs, Black. Condition: New. Listed at 14.27 USD. Description:Features: Crafted from carbon steel, which provides both good strength and corrosion resistance. Its outer hex head design makes installation a convenient process.Function: It serves as an outer Hex Head Pipe Connector, designed for closing and terminating the end of a pipe.Easy to use: For enhanced sealing, apply tape or pipe sealant when using these plugs. Application: These threaded male plugs are utilized to block holes in machinery, fittings, or pipes, effectively preventing the leakage of air, steam, gas, water, oil, and other fluids under pressure. Additionally, they are excellent for sealing intake manifold water ports, water pump ports, engine plug holes, and various other applications.Specification: Color: BlackMaterial: Carbon SteelThread Size: 3/8 NPT Hex Width: 17.5mm / 0.