Eaton 3326X6 Close Nipple 3/8 Inch Mnptf 1200 Psi

Product Description

The EATON 3326X6 is a close nipple pipe fitting designed for industrial fluid and gas piping systems. It features a 3/8 inch male MNPTF (Dryseal Male National Pipe Tapered Fuel) thread on both ends and an overall length of 1 inch, making it the shortest possible nipple configuration between two threaded connections. Rated to 1,200 psi maximum working pressure and rated for temperatures from -65 degrees F to 250 degrees F, this fitting suits demanding mechanical and industrial plumbing applications. Licensed plumbers, pipefitters, and industrial maintenance technicians typically install this part.

This close nipple is used wherever two female-threaded fittings must be joined with minimal spacing between them. Typical applications include industrial hydraulic lines, compressed air distribution, fuel systems, and general process piping. The MNPTF thread form provides a pressure-tight seal through thread interference without relying solely on thread sealant, which is well suited for high-pressure fuel and fluid service. The 3/8 inch thread size fits standard pipe runs at that bore diameter in both residential and light commercial mechanical installations.

Key Features

• Close nipple design minimizes space between two threaded fittings
• 3/8 inch MNPTF dryseal thread form for pressure-tight connections
• 1,200 psi maximum working pressure rating
• Wide temperature range: -65 degrees F to 250 degrees F
• 1 inch overall length for compact inline installation

Compatibility

Designed as an OEM-style replacement or new-installation fitting compatible with standard 3/8 inch female MNPTF or NPT threaded ports in industrial and mechanical piping systems.

Installation Notes

Installation should be performed by a licensed plumber or qualified pipefitter in accordance with applicable codes such as the IPC or IFGC depending on the fluid service. Depressurize and isolate the line completely before removing or installing any threaded fittings. Apply an appropriate thread sealant or PTFE tape to MNPTF threads as required by the specific service and local code. Avoid over-tightening, which can crack female fittings or distort thread engagement.