B K Mueller 521-208HN Black Right Hand Coupling 2 in

Product Description

The B K Mueller Industries 521-208HN is a 2-inch black right hand coupling designed for threaded pipe assemblies. This fitting provides a secure, right-hand threaded connection between pipe sections in standard black iron piping systems. It is suited for gas, air, and other compatible distribution lines where black iron fittings are specified. Licensed plumbers and pipefitters install this type of coupling as part of rough-in and repair work on threaded piping systems. The 2-inch diameter and black finish make it a common choice for commercial and residential piping infrastructure.

This coupling is used in residential and light commercial piping applications where right-hand threaded black iron fittings are required. Typical install scenarios include gas distribution piping, compressed air lines, and similar systems that call for standard black iron threaded components. It is sold in packages of 4 units, making it practical for multi-joint repairs or new construction rough-in work. The fitting conforms to standard right-hand thread orientation, consistent with the majority of threaded black iron pipe used in North American trade installations.

Key Features

• 2-inch diameter right-hand threaded coupling for standard black iron pipe
• Black finish consistent with standard black iron pipe fittings
• Sold in a package quantity of 4 units
• Right-hand thread orientation compatible with standard NPT pipe threading
• Suited for gas, air, and compatible fluid distribution lines where black iron is specified

Compatibility

Designed as an OEM-style replacement or standard fitting for 2-inch threaded black iron pipe systems. No specific model or brand compatibility data was provided in the product input.

Installation Notes

This coupling is installed by licensed plumbers or pipefitters working on threaded black iron piping systems. Shut off all gas or air supply and depressurize the line fully before removing or installing any threaded fitting. Apply an appropriate pipe thread sealant or tape rated for the intended service medium before making up the joint. Work must comply with local plumbing and mechanical codes, including applicable sections of the IFGC for gas piping applications.