Eaton 3329X12 Brass Long Nipple 3/4 in Mnptf 1200 Psi

Product Description

The EATON 3329X12 is a brass long nipple fitting with 3/4 inch male MNPTF (Dryseal National Pipe Thread Fuel) threads on both ends. It provides a rigid, threaded extension connection in pressurized piping systems handling liquids or gases. Rated to 1,200 psi maximum working pressure and designed for temperatures from -65 degrees F to 250 degrees F, this nipple suits demanding industrial and mechanical applications. At 2.5 inches overall length, it bridges tightly spaced fittings or valves where close nipples will not reach. Licensed plumbers, pipefitters, and HVAC technicians are the primary installers.

This long nipple is suited for use in hydraulic lines, fuel supply systems, compressed air distribution, and general industrial piping where a short threaded extension is needed. The MNPTF thread standard provides a pressure-tight seal without relying solely on thread sealant, making it appropriate for fuel and fluid service. The brass construction resists corrosion and is compatible with water, oil, and many fuel lines encountered in residential and light commercial mechanical systems.

Key Features

• Brass construction for corrosion resistance in fluid and fuel service
• 1,200 psi maximum working pressure rating
• Operating temperature range: -65 degrees F to 250 degrees F
• 3/4 inch MNPTF male threads on both ends for pressure-tight connections
• 2.5 inch overall length suits close-quarters piping layouts

Compatibility

Designed as an OEM-style replacement or stock fitting for 3/4 inch MNPTF threaded piping assemblies in industrial, HVAC, plumbing, and fuel distribution systems.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes, IPC, or IFGC requirements. Shut off and depressurize the line before removing or installing any threaded fitting. Apply an appropriate thread sealant or PTFE tape compatible with the service medium to the male threads before making up the joint. Do not over-tighten brass fittings, as the material can crack under excessive torque.