B K Mueller 521-930HC Black Hex Bushing 1/2x1/8 Pipe

Product Description

The B K Mueller Industries 521-930HC is a black hex bushing designed to reduce pipe thread connections from 1/2 inch to 1/8 inch. This type of threaded fitting is a standard component in gas piping, compressed air, and low-pressure fluid systems where a reducing connection is needed between two different pipe sizes. The hex profile allows for a secure wrench grip during installation. Plumbers, pipefitters, and HVAC technicians commonly install this fitting when transitioning between pipe runs or connecting gauges, sensors, and small-diameter accessories to larger threaded ports.

This fitting is suited for residential and light commercial applications involving black iron pipe systems. Typical use cases include gas line branch connections, instrument ports, and pressure tap fittings. The 1/2 inch male NPT to 1/8 inch female NPT configuration makes it a frequent choice when connecting small fittings or instrumentation to standard half-inch pipe runs. It ships in a package quantity of 30 units, making it practical for contractors stocking service vehicles or supply rooms.

Key Features

• Hex body design provides flat wrench surfaces for controlled tightening
• 1/2 inch male NPT to 1/8 inch female NPT reducing configuration
• Black finish consistent with standard black iron pipe system components
• Package quantity of 30 units for contractor and bulk stocking

Compatibility

Designed as an OEM-style replacement and standard-use fitting for black iron threaded pipe systems using NPT connections in 1/2 inch to 1/8 inch reducing applications.

Installation Notes

Installation is performed by licensed plumbers or pipefitters following applicable codes such as the IFGC or IPC. Shut off and depressurize the pipe system completely before removing or installing any threaded fittings. Apply an appropriate thread sealant or PTFE tape rated for the media being conveyed before threading the bushing into the female port. Do not over-tighten; use a calibrated torque wrench or follow standard hand-tight-plus-turns practice per code requirements for the application.