Parker 3/8 X 1/4 Gg-s Straight Pipe Coupling 6000 Psi

Product Description

The PARKER 3/8 X 1/4 GG-S is a straight pipe coupling designed for high-pressure industrial fluid systems. It connects two female-threaded pipe ends using FNPTF (Female National Pipe Taper Fuel) connections, with a reducing configuration from 3/8 inch to 1/4 inch thread. Rated to 6,000 psi maximum working pressure, this coupling is built from zinc-plated steel for corrosion resistance in demanding environments. It is commonly installed by plumbers, pipefitters, and industrial maintenance technicians working on compressed air, hydraulic, or fluid transfer lines.

This coupling is suited for use in industrial and commercial piping systems where a straight, reducing female-to-female threaded connection is required. The 3/8 inch by 1/4 inch thread configuration makes it appropriate for reducing line sizes within a run without requiring additional adapters. The zinc-plated steel construction holds up in environments with moderate moisture exposure. Typical applications include compressed air distribution, hydraulic manifolds, and general-purpose fluid transfer systems in manufacturing, maintenance, and mechanical service settings.

Key Features

• 6,000 psi maximum working pressure rating for high-pressure service
• FNPTF connection type on both ends for secure, tapered thread sealing
• Reducing configuration: 3/8 inch to 1/4 inch female thread
• Zinc-plated steel construction for corrosion resistance
• Straight fitting shape for in-line installation
• Compact overall length of 1.125 inches with 0.875 inch hex size for standard wrench access

Compatibility

Designed as an OEM-style replacement or direct-fit component for industrial piping systems requiring a straight reducing FNPTF coupling rated to 6,000 psi.

Installation Notes

Installation should be performed by a qualified plumber or pipefitter. Depressurize and isolate the line completely before removing or installing any fitting. Apply appropriate thread sealant or PTFE tape to the FNPTF threads per the system fluid and pressure requirements. Use a properly sized wrench on the 0.875 inch hex to avoid rounding and ensure a leak-free connection without over-tightening.