Parker 4-1/8 F5OG-S Pipe Adapter 6000 Psi Nptf

Product Description

The PARKER 4-1/8 F5OG-S is a straight hydraulic pipe adapter designed to connect a 7/16-20 male straight thread O-ring (MSTO) port to a 1/8 inch female NPTF thread. Constructed from zinc-plated steel, this fitting delivers a maximum working pressure of 6,000 psi, making it well suited for demanding hydraulic and fluid power circuits. The O-ring face on the male end provides a reliable, leak-resistant seal without relying solely on thread engagement. Licensed plumbers, hydraulic technicians, and industrial maintenance mechanics install this type of adapter when converting or extending hydraulic plumbing connections in tight-clearance environments.

This adapter is used in industrial hydraulic systems, mobile equipment, and fluid power assemblies where a transition between straight thread O-ring ports and NPTF female pipe threads is required. Its straight body profile keeps the fluid path direct, and the 9/16 inch hex size allows for installation with standard open-end or combination wrenches in confined spaces. Typical applications include machine tool hydraulics, agricultural equipment, and construction machinery plumbing.

Key Features

• 6,000 psi maximum working pressure rated for high-pressure hydraulic service
• Male straight thread O-ring end provides a positive, leak-resistant seal at the port face
• Female NPTF thread conforms to SAE Standard 090156 for pressure-tight pipe connections
• Zinc-plated steel construction resists corrosion in industrial environments
• Straight fitting shape maintains a direct, unrestricted flow path
• 9/16 inch hex size allows installation with common hand tools

Compatibility

Designed as an OEM-style replacement or new-installation adapter for hydraulic and fluid power systems requiring a 7/16-20 male straight thread O-ring to 1/8 inch female NPTF transition. Conforms to SAE 090156 standards.

Installation Notes

Installation should be performed by a qualified hydraulic or mechanical technician. Depressurize and fully isolate the hydraulic circuit before removing or installing any fitting. Apply appropriate thread sealant to the NPTF female side as required; the O-ring side does not require thread sealant. Do not overtighten, as excessive torque can damage the O-ring or distort the fitting body.