B K Mueller 521-931HC Black Hex Bushing 1/2x1/4

Product Description

The B K Mueller Industries 521-931HC is a black hex bushing designed to reduce pipe connections from a 1/2-inch female fitting to a 1/4-inch male thread. Hex bushings are standard threaded fittings used to change pipe size within a threaded piping system. The external hex allows for wrench engagement during installation, providing solid torque transfer without damaging the fitting. This bushing is finished in black, consistent with black iron pipe fittings used in gas, air, and other compatible piping applications. Plumbers, pipefitters, and gas technicians install this type of fitting in both residential and light commercial systems.

This hex bushing suits applications where a threaded piping run requires a size reduction from 1/2 inch to 1/4 inch. Common installation scenarios include gas supply lines, compressed air systems, and low-pressure piping assemblies that use standard NPT-threaded black iron fittings. The compact hex profile allows installation in tight spaces where a standard reducing coupling would not fit. The package contains 30 pieces per unit, making it suitable for contractors stocking job boxes or supply rooms.

Key Features

• Reduces from 1/2-inch female thread to 1/4-inch male thread
• External hex profile allows wrench engagement for proper tightening
• Black finish consistent with standard black iron pipe fitting systems
• Compact bushing design fits where reducing couplings cannot
• Packaged 30 pieces per unit for contractor and shop stocking

Compatibility

Designed as an OEM-style replacement and standard-use fitting compatible with 1/2-inch female NPT to 1/4-inch male NPT threaded piping systems using black iron fittings.

Installation Notes

Installation is performed by licensed plumbers, pipefitters, or gas technicians depending on the application. Shut off and depressurize the piping system completely before removing or installing any threaded fittings. Apply an approved thread sealant or pipe tape to the male threads before assembly. Follow applicable code requirements including the IFGC for gas piping or IPC for plumbing applications.