B K/mueller Inds(import) 521-204HN Black Coupling 3/4 in

Product Description

The B K/MUELLER INDS(IMPORT) 521-204HN is a black right-hand threaded coupling designed for joining pipe sections in gas, water, and general plumbing distribution systems. Sized at 3/4 inches, this coupling provides a standard right-hand thread engagement suitable for connecting two male-threaded pipe ends. The black finish is consistent with black iron pipe fittings commonly used in gas distribution and industrial piping. Licensed plumbers and pipefitters use this fitting during new construction, rough-in work, and service repairs on threaded pipe systems.

This coupling is well-suited for residential and light commercial applications where 3/4-inch black iron or compatible threaded pipe is specified. Typical installations include natural gas supply lines, propane distribution, and industrial fluid conveyance where right-hand thread fittings are required by code. This SKU is packaged in a quantity of 25 units per package, making it practical for contractors stocking a service vehicle or completing multi-fixture rough-in jobs.

Key Features

• 3/4-inch right-hand thread coupling for joining two threaded pipe ends
• Black finish consistent with standard black iron pipe fittings
• Packaged in quantities of 25 units for trade and jobsite efficiency
• Sold per each unit within the 25-count package

Compatibility

Designed as an OEM-style replacement and standard trade fitting compatible with 3/4-inch right-hand threaded pipe systems, including black iron pipe used in gas and fluid distribution applications.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing and mechanical codes, including IFGC requirements where gas service is involved. Shut off the gas or water supply and depressurize the line before beginning any fitting work. Apply an appropriate thread sealant or tape rated for the service fluid before making up the joint. Do not over-tighten threaded fittings, as this can crack or deform the fitting body.