Parker FEM-251-6FO-NL Hydraulic Coupler 1/4 in 4568 Psi

Product Description

The PARKER FEM-251-6FO-NL is a no-lock female pipe thread hydraulic hose coupler designed for straight-through fluid connections in high-pressure hydraulic systems. Built from steel with a 9/16-18 SAE thread and a 1/4-inch body diameter, it carries a maximum working pressure of 4568 psi. The coupler measures 2.08 inches in overall length and supports a maximum flow rate of 3.00 GPM. It is installed by hydraulic technicians and equipment mechanics working on mobile and stationary hydraulic circuits requiring a reliable threaded connection without a locking sleeve mechanism.

This coupler is suited for use with hydraulic tools and skid loader attachments operating within its rated pressure range. The no-lock design allows for quick disconnection without a secondary locking collar, making it appropriate for lower-cycle applications where a locking sleeve is not required by the system design. It conforms to ISO 16028 standards, ensuring dimensional and performance compatibility with compliant hydraulic system components in both light industrial and construction equipment environments.

Key Features

• No-lock female pipe thread design for straightforward connection and disconnection
• Maximum working pressure of 4568 psi for demanding hydraulic applications
• 9/16-18 SAE threaded connection on a 1/4-inch body diameter
• Maximum flow rate of 3.00 GPM
• Straight body shape, 2.08 inches overall length
• Meets ISO 16028 standards for flat-face quick-disconnect couplings
• Steel construction for durability in hydraulic service conditions

Compatibility

Rated for use with hydraulic tools and skid loader attachments. Conforms to ISO 16028 and is part of the PARKER FEM series, designed as an OEM-style replacement or new-installation coupler for hydraulic systems requiring a 1/4-inch no-lock female pipe thread interface.

Installation Notes

Installation should be performed by a qualified hydraulic technician. Depressurize and relieve residual hydraulic pressure in the circuit before disconnecting or installing any coupler. Use appropriate thread sealant compatible with hydraulic fluid and verify the mating fitting matches the 9/16-18 SAE thread specification before final assembly. Torque to the system or fitting manufacturer specifications and inspect for leaks after system repressurization.