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The MIDLAND INDUSTRIES 28842 is a countersunk hex plug designed to seal pipe openings in BSPT (British Standard Pipe Taper) threaded systems. Built from brass with a nickel-plated finish, it provides corrosion resistance in fluid and gas piping applications. The plug features a 3/8-inch BSPT connection with a 3/8-19 thread form and a countersunk hex drive for recessed installation. At 0.03 pounds, it is a compact, lightweight fitting suited for tight spaces. Plumbers, pipefitters, and mechanical contractors install this type of plug when closing off unused branch ports or capping pipe ends during system assembly or maintenance.
This plug is used in residential and commercial piping systems where BSPT-threaded connections are specified. It is commonly installed in pipe manifolds, valves, and fluid distribution assemblies to seal inactive ports. The nickel-plated brass construction makes it appropriate for water, air, and compatible fluid service. Its small footprint - measuring approximately 0.55 inches in length and 0.6 inches in width - allows installation in confined areas where standard hex plugs may not fit flush.
Designed as an OEM-style replacement or service fitting for piping systems and components with 3/8-inch BSPT-threaded ports, including valves, manifolds, and fluid distribution assemblies requiring a countersunk hex plug.
Installation should be performed by a licensed plumber or pipefitter following applicable IPC or local mechanical code requirements. Shut off system pressure and drain the line before removing or installing pipe plugs. Apply appropriate thread sealant or PTFE tape rated for the service fluid to the BSPT threads before installation. Do not overtighten brass fittings, as the material is subject to deformation under excessive torque.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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