Parker PBH-251-4FP Pneumatic Hose Coupler 1/4 in Nptf 300 Psi

Product Description

The PARKER PBH-251-4FP is a threaded pneumatic hose coupler designed for industrial compressed-air systems. It features a 1/4 inch female NPTF threaded connection and a 1/4 inch body diameter, with a maximum working pressure of 300 psi. Constructed from polyamide, this coupler offers lightweight corrosion resistance suitable for dry or lubricated air service. The industrial interchange coupling style ensures broad compatibility with standard quick-connect setups found in production, maintenance, and service environments. At 2.6 inches overall length, it fits standard hose assemblies without adapters in most configurations. HVAC technicians, plumbers, and general mechanical contractors install this coupler as part of pneumatic tool and air supply connections.

This coupler is suited for residential and commercial applications where a reliable, low-bulk quick-connect fitting is required on pneumatic hose lines. Typical installations include air compressor outlets, tool drops, and pneumatic control lines in mechanical rooms, job sites, and light industrial settings. The industrial interchange design allows it to mate with the wide range of industrial-standard couplers and plugs already in use across most trade environments. Operating temperature range spans 0 degrees F to 160 degrees F, covering typical indoor and outdoor service conditions.

Key Features

• 1/4 inch female NPTF threaded connection for secure, leak-resistant assembly
• 300 psi maximum working pressure rated for standard pneumatic tool and air supply service
• Polyamide construction offers lightweight corrosion resistance compared to brass or steel fittings
• Industrial interchange coupling type compatible with widely used quick-connect plug standards
• Operating range of 0 degrees F to 160 degrees F suits most indoor and outdoor service environments
• Compact 2.6 inch overall length with 0.67 inch hex for standard wrench installation

Compatibility

Designed as an OEM-style replacement or new-installation coupler for industrial interchange pneumatic quick-connect systems using 1/4 inch NPTF female threaded fittings.

Installation Notes

Installation should be performed by a qualified technician familiar with pneumatic systems. Depressurize and bleed down the air line fully before removing or installing any coupler. Apply thread sealant appropriate for pneumatic service to the NPTF threads and tighten using a standard open-end or adjustable wrench on the 0.67 inch hex. Do not overtighten polyamide-bodied fittings; thread engagement should be snug without exceeding the fitting material limits.