METALLIXITY 3/8" MNPT x 1/4" FNPT Brass Hex Bushing, 2-Pack

The brass construction gives this METALLIXITY hex bushing a durable, corrosion-resistant material for threaded pipe connections.

Each fitting adapts a 3/8" male NPT thread to a 1/4" female NPT thread, helping join components with different thread sizes.

With two bushings in the pack, you can keep a pair on hand for plumbing adjustments or maintenance. The listed applications include water lines, tub spouts and shower heads.

Everyday use

A threaded size change can be useful when a water-line connection and the fitting it needs to meet have different NPT sizes. This bushing provides a male connection at 3/8" and a female connection at 1/4", so it can bridge those two thread sizes without changing the main focus of the setup. Match the fitting to compatible NPT threads on the components being joined.

For a home plumbing adjustment, for example, the bushing can serve as the connection between a 3/8" female NPT port and a 1/4" male NPT fitting. Its hex shape provides a form suited to tightening with a wrench during assembly. The brass material is valued for corrosion resistance, strength and wear resistance, making it a practical choice for pipe-fitting applications.

Spec sheet

• Type: Hex bushing pipe fitting
• Material: Brass
• Connector: 3/8" male NPT to 1/4" female NPT
• Thread type: NPT
• Quantity: 2 pieces
• Listed applications: Water line, tub spout and shower head connections

Where it shines

This fitting is useful when the connection sizes differ but both sides use the specified NPT thread arrangement. Rather than choosing a fitting with the same thread size at both ends, this bushing changes from 3/8" male to 1/4" female in one compact connection. That makes it relevant for adapting a compatible water-line connection or for plumbing work involving a tub spout or shower head.

The two-piece pack can also be handy for jobs involving more than one connection, or for keeping a second fitting available for a later repair. Brass is machinable and has good thermal conductivity, in addition to its corrosion and wear resistance—properties that make it a commonly used material for fittings handling fluids. For vehicle-related maintenance, pipe fittings also have applications in fluid, fuel, air, cooling and heating systems, the thread sizes and intended system still need to match the specific job.

When it makes sense

Choose this METALLIXITY bushing when the connection calls for a 3/8" male NPT end on one side and a 1/4" female NPT end on the other. It’s a good fit if you need a straightforward threaded size adapter for a compatible water-line, tub-spout or shower-head connection, or want two brass fittings available for plumbing maintenance. Its clearly defined thread configuration and two-piece quantity make it easy to select for a specific connection task.