B K Mueller 521-932HN Black Hex Bushing 1/2 X 3/8 Inch

Product Description

The B K Mueller Industries 521-932HN is a black hex bushing designed to reduce a 1/2-inch female pipe thread to a 3/8-inch male pipe thread. This type of fitting is a standard reducing bushing used in black iron pipe assemblies for gas distribution, compressed air lines, and general plumbing systems. The hex body profile allows for a secure wrench grip during installation. Plumbers, pipefitters, and gas-line technicians install these bushings when transitioning between pipe sizes within a threaded iron pipe system. Sold in a package quantity of 15 units, making it practical for service vans and shop stock.

This black hex bushing is suited for residential and light commercial applications where black iron pipe is the specified material. Common installation scenarios include gas appliance connections, low-pressure air distribution manifolds, and industrial pipe assemblies requiring a threaded size reduction. The black finish is consistent with standard black iron pipe systems used in natural gas and propane distribution.

Key Features

• Reduces 1/2-inch female pipe thread to 3/8-inch male pipe thread
• Hex body profile provides full wrench engagement for proper torque
• Black finish compatible with standard black iron pipe assemblies
• Packaged in quantities of 15 units per pack for stocking efficiency
• Compact form factor suits tight or recessed fitting locations

Compatibility

Designed as an OEM-style replacement and standard-use fitting for black iron threaded pipe systems using 1/2-inch to 3/8-inch NPT size transitions.

Installation Notes

Installation is performed by licensed plumbers or gas-line technicians in accordance with applicable local codes and IFGC requirements for gas-line work. Always shut off the gas supply or depressurize the line before threading or unthreading any fitting. Apply a listed pipe thread sealant or PTFE tape rated for the service medium before assembly. Do not over-tighten; use a pipe wrench with steady, controlled force on the hex body.