Eaton 3300X12 Brass Pipe Coupling 3/4 in Fnptf 1200 Psi

Product Description

The EATON 3300X12 is a straight brass pipe coupling designed for industrial fluid and pneumatic systems requiring a reliable threaded connection. Fitted with 3/4-inch FNPTF (Female National Pipe Tapered Fuel) threads on both ends, this coupling joins two male-threaded pipe sections in a straight-line configuration. It carries a maximum working pressure of 1,200 psi and handles temperatures from -65 degrees F to 250 degrees F, making it suitable for a broad range of fluid handling, fuel, and compressed-air applications. Weighing 0.23 pounds, it is a compact, field-ready fitting used by licensed plumbers, pipefitters, and mechanical contractors.

This coupling is suited for residential and commercial piping installations where a durable, pressure-rated brass fitting is required. Typical applications include fuel lines, hydraulic systems, compressed-air distribution, and general industrial plumbing. The FNPTF thread standard provides a dryseal connection that seals on the threads themselves, reducing reliance on additional sealants in fuel and pneumatic service. The 1-1/2-inch overall length and 1-1/4-inch hex size make it compatible with standard pipe wrenches used in the field.

Key Features

• 3/4-inch FNPTF female threads on both ends for a dryseal threaded connection
• 1,200 psi maximum working pressure rating suitable for high-pressure fluid service
• Operating temperature range of -65 degrees F to 250 degrees F
• Straight-body coupling configuration for in-line pipe joining
• Brass construction provides corrosion resistance in fuel, water, and air service
• Meets SAE 130138 standards for industrial fitting performance

Compatibility

Designed as an OEM-style replacement and new-installation fitting for industrial and commercial piping systems using 3/4-inch FNPTF threaded connections.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable IPC and IFGC codes. Shut off and depressurize the affected line completely before removing or installing any threaded fitting. FNPTF dryseal threads are engineered to seal on thread engagement, but verify service requirements for your specific fluid media before omitting thread sealant. Use a pipe wrench sized to the 1-1/4-inch hex to avoid rounding the fitting body.