Parker PD222-787 Hydraulic Hose Coupler 1/8 in 6000 Psi Nptf

Product Description

The PARKER PD222-787 is a steel hydraulic hose coupler designed for high-pressure fluid transfer applications. Rated to 6,000 psi, this coupler fits 1/8 inch hose and uses a 1/8-27 NPTF thread for a pressure-tight, drip-resistant connection. The National Pipe Taper Fuel thread form creates an interference fit that seals on the threads themselves, reducing the need for additional sealants in many applications. This type of fitting is installed by hydraulic system technicians and millwrights working on industrial, mobile, and fluid power systems where reliable, leak-free connections at compact port sizes are required.

The PD222-787 is suited for hydraulic lines and fluid power circuits requiring a compact 1/8 inch connection point with a high-pressure rating. Typical install scenarios include mobile hydraulic equipment, industrial machinery, and fluid power assemblies where NPTF fittings are specified at gauge ports, cylinder ports, or manifold connections. The steel construction makes it appropriate for systems using petroleum-based hydraulic fluids and similar media compatible with carbon steel.

Key Features

• 6,000 psi pressure rating for high-pressure hydraulic service
• 1/8-27 NPTF thread provides a mechanical pressure-tight seal on the thread form
• Steel construction for durability in demanding fluid power environments
• Compact 1/8 inch hose size suits gauge ports and small-bore hydraulic circuits
• Coupler fitting type for direct hose-to-port or hose-to-hose connection

Compatibility

Designed as an OEM-style replacement or service fitting for hydraulic systems using 1/8 inch NPTF ported connections rated to 6,000 psi.

Installation Notes

Installation should be performed by a qualified hydraulic technician or pipefitter familiar with fluid power systems. Depressurize and isolate the hydraulic circuit completely before removing or installing any fittings. NPTF threads rely on thread-form interference for sealing, but inspect threads for damage and apply thread sealant per system specifications if required. Torque to the system or equipment manufacturer's specifications — do not over-tighten, as this can crack fittings or distort sealing surfaces.