Parker EZ-251-4FP Pneumatic Hose Coupler 300 Psi Steel

Product Description

The PARKER EZ-251-4FP is a steel pneumatic hose coupler from the E-Z Mate series, designed for industrial interchange applications in compressed air and pneumatic fluid systems. The coupler features a 1/4-18 female NPTF threaded connection with a 1/4 inch body diameter and an overall length of 2.25 inches. It is rated for a maximum working pressure of 300 psi and handles temperatures ranging from -40 degrees F to 250 degrees F. This fitting is installed by industrial maintenance technicians, HVAC mechanics, and pneumatic system specialists in both commercial and light industrial environments.

The EZ-251-4FP is suited for use in industrial compressed air systems, pneumatic tool hookups, and fluid transfer lines requiring a reliable quick-disconnect coupler. The industrial interchange design ensures broad cross-compatibility with standard pneumatic hose assemblies. The steel construction makes it appropriate for demanding shop-floor and mechanical room environments where durability and pressure retention are critical.

Key Features

• Industrial interchange coupler type for broad pneumatic system compatibility
• Female NPTF threaded connection, 1/4-18 thread size
• 300 psi maximum working pressure rating
• Operating temperature range: -40 degrees F to 250 degrees F
• Steel construction for durability in shop and mechanical room use
• Compact 2.25 inch overall length with 0.75 inch hex size for standard wrench installation

Compatibility

Designed as an OEM-style replacement or new-installation coupler for industrial interchange pneumatic hose systems using 1/4 inch body diameter fittings with female NPTF threaded connections.

Installation Notes

Installation should be performed by a qualified technician familiar with pneumatic system service. Depressurize the air line and bleed all residual pressure before removing or installing any coupler fitting. Apply thread sealant appropriate for pneumatic service to the NPTF threads and tighten using a wrench on the 0.75 inch hex to avoid damaging downstream hose or fittings. Verify that system operating pressure does not exceed the 300 psi rating of this fitting.