Eaton 3220X8X4 Brass Pipe Bushing 1/2 X 1/4 in Mnptf 5000 Psi

Product Description

The EATON 3220X8X4 is a straight brass pipe bushing designed to reduce a 1/2 inch male MNPTF thread down to a 1/4 inch female FNPTF thread. It serves as a compact, reliable adapter in hydraulic, pneumatic, and fluid-handling systems where thread size transitions are required inline. Rated to 5,000 psi maximum working pressure and suitable for temperatures ranging from -65 degrees F to 250 degrees F, this bushing handles demanding service conditions. The brass construction provides corrosion resistance in a wide range of media. Licensed plumbers, pipefitters, and hydraulic system technicians are the primary installers of this fitting type.

This bushing fits residential, commercial, and light industrial piping and hydraulic applications where a 1/2 inch male NPT port must be reduced to accept a 1/4 inch female NPT connection. Typical use cases include instrument ports, gauge connections, and control line taps in fluid power systems. The straight body geometry keeps the assembly compact and the 7/8 inch hex flat allows standard wrench installation without excessive torque on the fitting body. Overall installed length is 3/4 inch, making it suitable for tight-clearance manifold and block applications.

Key Features

• 5,000 psi maximum working pressure rating for high-pressure hydraulic and pneumatic service
• Brass construction provides corrosion resistance and compatibility with common hydraulic fluids, water, and air
• MNPTF x FNPTF connection type with tapered threads for leak-resistant sealing
• Wide temperature range: -65 degrees F to 250 degrees F
• 7/8 inch hex size accepts standard open-end or adjustable wrench
• Compact 3/4 inch overall length suits tight manifold and block installations
• Meets SAE 130140 standards

Compatibility

Designed as an OEM-style replacement or add-on fitting for hydraulic and pneumatic systems requiring a straight 1/2 inch MNPTF to 1/4 inch FNPTF thread reduction in brass construction.

Installation Notes

Installation is performed by licensed plumbers, pipefitters, or qualified hydraulic technicians. Depressurize and isolate the system completely before removing or installing any fittings. Apply an appropriate thread sealant or PTFE tape to the male tapered threads in accordance with the system fluid and pressure requirements. Do not overtighten — use the hex flats and a proper wrench; pipe wrenches on the body of a brass bushing can cause deformation or cracking.