Parker 6-1/4 F5OF-S Pipe Adapter 9/16-18 X 1/4 in Nptf

Product Description

The PARKER 6-1/4 F5OF-S is a straight hydraulic pipe adapter designed to connect a male straight thread O-ring (ORFS-style) port to a male NPTF fitting in industrial fluid power systems. It carries a maximum working pressure of 6,000 psi and is constructed from zinc-plated steel for corrosion resistance in demanding environments. The adapter measures 1.25 inches in overall length with an 11/16-inch hex size, making it compatible with standard wrenching tools. Hydraulic technicians and industrial pipefitters install this type of adapter when transitioning between thread standards in high-pressure hydraulic circuits, manifolds, and plumbing assemblies.

This adapter is suited for use in high-pressure industrial hydraulic systems, fluid power plumbing, and machine tool applications where a male straight thread O-ring port must mate with a male NPTF connection. The straight fitting shape keeps the assembly compact and in-line. It is typically installed in OEM equipment builds, hydraulic power units, and field repair situations where thread standard conversion is required without altering line routing.

Key Features

• 6,000 psi maximum working pressure for high-pressure hydraulic service
• Male straight thread O-ring x male NPTF connection for leak-resistant thread conversion
• Thread size 9/16-18 x 1/4 inch, conforming to UN/UNF-2A thread standard
• Zinc-plated steel construction provides corrosion resistance in industrial environments
• Compact straight fitting shape with 1.25-inch overall length and 11/16-inch hex
• Sold as a single unit with a minimum order quantity of 1

Compatibility

Designed as a direct-fit adapter for industrial hydraulic and fluid power systems requiring a male straight thread O-ring to male NPTF transition at a 9/16-18 x 1/4-inch thread size.

Installation Notes

Installation should be performed by a qualified hydraulic technician or industrial pipefitter. Depressurize and isolate the hydraulic circuit fully before removing or installing any fittings. Apply appropriate thread sealant to the NPTF male threads per system requirements; the O-ring side seals at the boss seat and does not require additional sealant on the straight thread. Torque to the fitting manufacturer's specification using a properly sized open-end or combination wrench on the 11/16-inch hex.