B K/mueller Inds(import) 521-201HN Black Rh Coupling

Product Description

The B K/MUELLER INDS(IMPORT) 521-201HN is a 1/4-inch black right-hand coupling designed for threaded pipe connections in plumbing and gas distribution systems. This fitting accepts standard right-hand threads and joins two pipe sections in a straight-line configuration. The black finish indicates a non-galvanized iron or steel construction suited for gas lines and industrial piping applications. Licensed plumbers and pipefitters install this type of coupling during rough-in work, repairs, and system extensions where a reliable threaded joint is required.

This coupling is sized at 1/4 inch and is typically used in residential and light commercial gas supply lines, compressed air systems, and similar threaded-pipe applications. It ships in a package quantity of 10 units, making it practical for contractors completing multi-point installations or keeping inventory on service vehicles. Right-hand thread orientation is standard for most threaded pipe fittings used in North American plumbing and gas systems.

Key Features

• 1/4-inch size for small-diameter threaded pipe connections
• Right-hand thread orientation matches standard pipe fitting systems
• Black finish suitable for gas line and industrial piping use
• Package quantity of 10 units for multi-point or stocking orders
• Straight coupling configuration joins two pipe sections in line

Compatibility

Designed as a standard-thread replacement coupling for 1/4-inch right-hand threaded pipe systems commonly found in residential and light commercial gas and plumbing installations.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes and the International Fuel Gas Code (IFGC) or International Plumbing Code (IPC) where relevant. Shut off the gas or fluid supply and relieve system pressure before removing or installing any threaded fitting. Use appropriate thread sealant or PTFE tape rated for the intended service medium. Inspect threads for damage before assembly and do not overtighten, which can crack fittings or distort sealing surfaces.