Parker UC-251-4FP Pneumatic Hose Coupler 1/4 in Brass

Product Description

The PARKER UC-251-4FP is a brass pneumatic hose coupler designed for industrial interchange applications in compressed air and pneumatic fluid systems. It features a female NPSF threaded connection with a 1/4-18 thread size and a 1/4 inch body diameter. The coupler is rated for a maximum working pressure of 150 psi and operates across a wide temperature range of -40 to 250 degrees F. At 0.23 pounds, it is a compact, lightweight fitting suited for use in production, maintenance, and service environments where fast-connect pneumatic hose connections are required. Licensed HVAC and mechanical technicians, industrial plumbers, and maintenance professionals install this type of coupler as part of air tool and pneumatic circuit assemblies.

The UC-251-4FP is built for use in industrial pneumatic systems where the universal industrial interchange standard is specified. It is appropriate for production floor tool drops, compressor outlet manifolds, and portable air supply lines. The threaded female NPSF connection allows direct engagement with standard male industrial interchange nipples. Its brass construction provides corrosion resistance suitable for dry and lubricated compressed air service, as well as many neutral gas applications.

Key Features

• Industrial interchange series for broad cross-brand compatibility with standard male nipples
• Female NPSF 1/4-18 threaded entry for secure, leak-resistant connection
• Brass body resists corrosion in compressed air and neutral gas service
• 150 psi maximum working pressure rating
• Wide service temperature range: -40 to 250 degrees F
• Compact overall length of 2.06 inches with 0.81 inch hex for wrench installation

Compatibility

Designed as an OEM-style replacement or new-installation coupler compatible with standard industrial interchange male nipples used in pneumatic hose and air tool systems.

Installation Notes

Installation is performed by qualified mechanical or pneumatic technicians. Always depressurize and bleed down the air supply line before removing or installing couplers. Use an appropriately sized open-end or combination wrench on the 0.81 inch hex; do not use pipe wrenches directly on the body. Apply thread sealant appropriate for pneumatic service per the system manufacturer and local mechanical code requirements.