B K/mueller Inds(import) 521-987HN Black Hex Bushing

Product Description

The B K/MUELLER INDS(IMPORT) 521-987HN is a black hex bushing designed to reduce a 2-inch female pipe thread to a 1-1/2-inch male pipe thread. Hex bushings serve as a concentric reducer fitting, allowing two different pipe sizes to be joined in a threaded piping system. This fitting is finished in black, indicating standard black malleable iron or black pipe construction suitable for gas, air, or other compatible piping applications. Plumbers and pipefitters install this type of bushing when transitioning between pipe sizes without adding a full coupling or reducing nipple. The part ships individually and is sized for fast, straightforward thread engagement with standard NPT connections.

This hex bushing is used in residential and light commercial piping systems where a 2-inch line must reduce down to a 1-1/2-inch branch or connection point. Common install scenarios include gas distribution manifolds, black iron pipe assemblies for natural gas or propane, and compressed air lines. The hex shoulders allow a wrench to seat the fitting securely without slipping during tightening. It is well-suited for above-ground, interior piping runs where black iron fittings are the standard specification.

Key Features

• 2-inch female NPT inlet reducing to 1-1/2-inch male NPT outlet
• Black finish consistent with standard black iron pipe fittings
• Hex body design allows wrench engagement for proper torque-free hand tightening
• Weighs 1.85 pounds — solid, full-body construction
• Sold as individual unit (each)

Compatibility

Designed as an OEM-style replacement or standard trade fitting for threaded black iron pipe systems using 2-inch to 1-1/2-inch NPT connections.

Installation Notes

Installation is performed by licensed plumbers or pipefitters following applicable code requirements such as the IFGC or IPC depending on the service fluid. Shut off and depressurize the line before making or breaking any threaded connection. Apply an approved thread sealant or pipe tape rated for the intended service fluid to all male threads before assembly. Do not use this fitting in applications or with fluids for which it has not been rated by the manufacturer.