B K/mueller Inds(import) 521-808HN Black Plug 2 in 5pk

Product Description

The B K/MUELLER INDS(IMPORT) 521-808HN is a 2-inch black plain plug used to cap or terminate threaded pipe ends in plumbing and piping systems. This fitting provides a secure, threaded closure for open pipe connections, preventing flow and sealing off unused ports during system maintenance, installation, or testing. Sold in a package of 5 units, it suits jobsite use where multiple fittings are needed at once. Licensed plumbers and pipefitters typically install this type of plug in residential and light commercial applications. The black finish indicates a malleable iron or black-iron material appropriate for gas and general-purpose piping.

Black plain plugs of this type are commonly used in gas piping, compressed air lines, and general plumbing rough-in work. They are installed wherever a threaded pipe port needs to be permanently or temporarily closed. The 2-inch size fits standard NPT female threaded fittings of that diameter. This SKU ships as a 5-pack, making it practical for multi-port manifold work or service van stocking.

Key Features

• 2-inch size fits standard 2-inch female NPT threaded connections
• Black finish suitable for black-iron gas and general-purpose piping systems
• Plain plug design provides a clean, tool-tight threaded closure
• Sold in a 5-pack for jobsite efficiency and restocking

Compatibility

Designed as an OEM-style replacement or standard stock fitting compatible with 2-inch female NPT threaded pipe connections in residential and commercial plumbing and gas piping systems.

Installation Notes

Installation is performed by licensed plumbers or pipefitters in accordance with applicable codes such as the IPC or IFGC. Shut off and depressurize the system fully before installing or removing any threaded plug. Use an appropriate pipe wrench or fitting wrench and apply thread sealant or PTFE tape as required by the system type and local code. Do not overtighten, as this can damage female threaded fittings.