About This Material: Brass pipe plugs Made of high quality brass with superior anti-corrosive and high strength、high hardness. Notice: NPT Thread Size is a Nominal Pipe Size, and it Does Not represent the actual diameter. Hex Plug: A countersunk plug with a hex drive designed to seal the end of a pipe or fitting. It fits into a female pipe and features an internal hexagonal head, allowing for greater leverage with a wrench during installation and removal. Max. Pressure&Temperature range: 150 PSI, -65 to 250 F Widely Applications: These plugs are used to seal holes in machinery, fittings, or pipes, effectively preventing the leakage of air, steam, gases, water, oil, and other pressurized fluids. They are also ideal for closing off water ports, water pump openings, and water temperature tanks. Overview Size : 3/8" NPT Material : Brass Brand : GASHER Color : Hex Plug(Brass) Item Weight : 0.2 Pounds Manufacturer : GASHER