Parker 12-1/2 F5OG-S Pipe Adapter 5000 Psi Straight Zinc Steel

Product Description

The PARKER 12-1/2 F5OG-S is a straight hydraulic pipe adapter designed to connect a 1-1/16-12 male straight thread O-ring port to a 1/2-inch female NPTF thread. Constructed from zinc-plated steel, it delivers a maximum working pressure of 5,000 psi, making it suitable for demanding hydraulic and fluid power circuits. The O-ring face seal on the male end provides a leak-resistant connection, while the NPTF female end forms a pressure-tight mechanical thread seal without sealant tape. Plumbers, hydraulic system technicians, and industrial pipefitters install this adapter to transition between two common thread standards in fluid power assemblies.

This adapter is used in industrial hydraulic systems, mobile equipment hydraulics, and high-pressure fluid transfer lines where a straight male O-ring port must mate with a female NPTF fitting. It is suited for both shop-built and OEM hydraulic circuit assemblies requiring a compact, straight-configuration transition fitting. The zinc plating provides corrosion resistance for general indoor and moderate-exposure environments.

Key Features

• 5,000 psi maximum working pressure for high-pressure hydraulic service
• Male straight thread O-ring connection resists leakage without thread sealant
• Female NPTF thread forms a pressure-tight mechanical seal
• Zinc-plated steel construction for corrosion resistance and durability
• Straight fitting shape for in-line installations with minimal flow restriction
• 1-1/4-inch hex size for standard wrench engagement during installation

Compatibility

Designed as an OEM-style replacement or service fitting for hydraulic and fluid power systems requiring a male straight thread O-ring to female NPTF straight adapter in zinc-plated steel construction.

Installation Notes

Installation should be performed by a qualified hydraulic technician or pipefitter. Depressurize and isolate the hydraulic circuit completely before removing or installing any fitting. Hand-tighten the O-ring port end first, then torque with an appropriately sized wrench on the 1-1/4-inch hex. Inspect the O-ring for damage before assembly and replace it if worn; do not overtighten the NPTF female end, as this is a thread-seal connection that relies on proper thread engagement.