Parker 1720639 Female O-ring Boss Nipple 4000 Psi 3/4 in

Product Description

The PARKER 1720639 is a straight female O-ring boss (ORB) nipple designed for high-pressure hydraulic hose assemblies. It features a 3/4-inch hose size with a 1-1/16-12 thread and a maximum working pressure rating of 4,000 psi. The fitting is machined from steel and uses a threaded connection type, making it a durable choice for demanding fluid power applications. Licensed hydraulic technicians and mobile equipment mechanics use this fitting to terminate hose runs at ports requiring ORB thread engagement. The straight geometry keeps routing simple where inline connections are preferred.

This fitting is suited for mobile hydraulic applications including snow plow systems and truck-trailer connections. Its ISO 7241-1 Series A compliance and SAE shaft type make it compatible with standard hydraulic circuits operating at or below 4,000 psi and flow rates up to 28.00 GPM. It belongs to the Parker 6600 Series and is appropriate for both OEM assembly and field repair work on mobile equipment.

Key Features

• 4,000 psi maximum working pressure for high-demand hydraulic circuits
• 3/4-inch hose size with 1-1/16-12 ORB thread for secure, leak-resistant sealing
• Straight configuration for straightforward inline hose routing
• Steel construction for durability in mobile and outdoor environments
• Maximum flow rate of 28.00 GPM supports high-volume hydraulic systems
• Meets ISO 7241-1 Series A standards for broad system compatibility

Compatibility

Designed for use in mobile applications, snow plow systems, and truck-trailer hydraulic connections. Suitable for SAE-threaded hydraulic circuits using Parker 6600 Series fittings operating within the rated pressure and flow specifications.

Installation Notes

Installation should be performed by a qualified hydraulic technician familiar with fluid power systems and applicable SAE and ISO standards. Depressurize and fully bleed the hydraulic system before removing or installing any fittings to prevent injury from high-pressure fluid release. Use the appropriate wrenches to achieve proper thread engagement without overtightening, which can damage the O-ring sealing surface. Inspect the O-ring for damage before assembly and replace it if any deformation or cuts are present.