B K/mueller Inds(import) 521-965HN Black Hex Bushing

Product Description

The B K/MUELLER INDS(IMPORT) 521-965HN is a black hex bushing used to reduce a female-threaded pipe opening from a larger diameter to a smaller one. This fitting accepts a 1-1/4 inch female thread on the outer end and a 1 inch male thread on the inner end. The hex body allows for standard wrench engagement during installation, making assembly straightforward for plumbers and pipefitters working on gas, oil, or water piping systems. The black finish indicates a malleable iron or steel construction suited for non-corrosive pipe applications.

This hex bushing is commonly used in residential and light commercial plumbing and gas piping installations where a threaded reducer is needed between pipe sizes. It is a standard hardware item found in natural gas distribution lines, compressed air systems, and black iron piping assemblies. The part ships in a package quantity of 5, making it practical for service contractors who need multiple fittings on a single job.

Key Features

• Hex body design allows full wrench engagement for proper thread seating
• Reduces from 1-1/4 inch female thread to 1 inch male thread
• Black finish suitable for black iron pipe systems including gas and air lines
• Sold in a package of 5 units for multi-fitting jobs

Compatibility

Designed as an OEM-style replacement and standard fitting for black iron threaded pipe systems requiring a 1-1/4 inch to 1 inch reducing bushing.

Installation Notes

Installation is performed by licensed plumbers or qualified pipefitters in accordance with applicable local plumbing and gas codes, including the International Fuel Gas Code where natural gas lines are involved. Shut off and depressurize the pipe system before removing or installing any threaded fitting. Apply an approved thread sealant or PTFE tape to male threads before assembly and tighten to full thread engagement using a pipe wrench on the hex body. Do not overtighten malleable iron fittings as this may crack the fitting body.