Parker 4-1/8 F5OF-S Pipe Adapter 6000 Psi Nptf

Product Description

The PARKER 4-1/8 F5OF-S is a straight industrial pipe adapter designed for high-pressure hydraulic and fluid-power plumbing applications. It features a Male Straight Thread O-Ring (STOR) connection on one end and a Male NPTF thread on the other, allowing technicians to transition between these two common thread standards in a single fitting. Rated to 6,000 psi maximum working pressure, this adapter is built for demanding service environments where leak-free performance is critical. The 9/16-inch hex size provides a solid wrench flat for proper installation torque. It is sold individually and suits professional fluid-power and industrial maintenance work.

This adapter is suited for use in hydraulic systems, pneumatic circuits, and industrial fluid lines where a 7/16-20 Male Straight Thread O-Ring port must be connected to a 1/8-inch Male NPTF fitting or port. Typical installation scenarios include manifold connections, pump ports, valve bodies, and cylinder fittings in both mobile and stationary hydraulic equipment. It follows UN/UNF-2A thread standards on the straight-thread end, ensuring consistent fit with O-ring boss (ORB) ports found throughout industrial and mobile hydraulic assemblies.

Key Features

• Straight adapter configuration for direct inline port-to-port connections
• Male Straight Thread O-Ring (STOR) x Male NPTF dual-standard thread interface
• 6,000 psi maximum working pressure rating for high-pressure hydraulic service
• 7/16-20 thread size on the O-ring end; 1/8-inch NPTF on the pipe thread end
• 9/16-inch hex flat for standard wrench installation
• UN/UNF-2A thread standard compliance on the straight-thread end

Compatibility

Designed for use in hydraulic and fluid-power systems requiring a Male Straight Thread O-Ring to Male NPTF straight adapter at the 7/16-20 x 1/8-inch thread size combination. Compatible with O-ring boss ports conforming to UN/UNF-2A thread standards.

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 fittings. The O-ring on the straight-thread end must be inspected and properly seated before assembly to ensure a leak-free connection; do not reuse a damaged or missing O-ring. Refer to the system manufacturer guidelines and applicable fluid-power standards for proper assembly procedures.