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

Product Description

The PARKER FEM-251-4FP-NL is a no-lock female pipe thread hydraulic hose coupler designed for straight, threaded connections in high-pressure hydraulic systems. Constructed from steel with an NPSF thread interface, this coupler handles a maximum working pressure of 4568 psi and supports a maximum flow rate of 3.00 GPM. The straight body measures 1.96 inches in overall length with a 0.25 inch body diameter and accepts a 1/4-18 thread size. It is installed by hydraulic technicians and equipment mechanics on mobile and stationary hydraulic circuits where a reliable, tool-free disconnect is not required.

This coupler is suited for use with hydraulic tools and skid loader attachments operating within its rated pressure range. The no-lock design simplifies installation in low-cycle or semi-permanent connections where the coupler will not be disconnected under pressure. It conforms to ISO 16028 standards, making it a recognized choice for standardized hydraulic circuit assemblies in agricultural, construction, and industrial equipment service applications.

Key Features

• No-lock female pipe thread design for straightforward, semi-permanent hydraulic connections
• Maximum working pressure of 4568 psi for demanding hydraulic service
• Maximum flow rate of 3.00 GPM
• Steel construction for durability in hydraulic tool and equipment environments
• NPSF threaded shaft type with 1/4-18 thread size
• Conforms to ISO 16028 standards

Compatibility

Designed for use with hydraulic tools and skid loader attachments. Conforms to ISO 16028 for compatibility with standardized hydraulic coupling systems in that series.

Installation Notes

Installation should be performed by a qualified hydraulic technician. Depressurize and bleed the hydraulic system fully before connecting or disconnecting any fittings. Use appropriate thread sealant rated for hydraulic service on NPSF threads and tighten to the fitting manufacturer's guidelines. Inspect threads and sealing surfaces for damage before installation to prevent leaks under pressure.