Parker 4050P-T6 O-ring Boss Poppet Coupler 9/16-18 3000 Psi

Product Description

The PARKER 4050P-T6 is a steel hydraulic O-Ring Boss poppet coupler designed for high-pressure fluid connections in hydraulic systems. It features a 9/16-18 thread size and a rated working pressure of 3,000 psi. The SAE shaft type ensures compatibility with standard hydraulic circuit configurations. This coupler is installed by hydraulic technicians, millwrights, and mobile equipment mechanics wherever a reliable, leak-resistant boss-style connection is required. The O-Ring Boss design provides a positive face seal that reduces the risk of external leakage compared to tapered thread fittings.

This coupler is suited for use in industrial and mobile hydraulic applications including construction equipment, agricultural machinery, and manufacturing systems. It is installed at hose-to-port or hose-to-component junctions where an O-Ring Boss port is present. The 1/4 inch body diameter and compact form factor make it appropriate for installations with limited clearance around hydraulic manifolds, cylinders, and pumps.

Key Features

• 3,000 psi rated working pressure for demanding hydraulic service
• O-Ring Boss poppet design provides a positive seal at the port face
• 9/16-18 thread size conforms to SAE standard specifications
• Steel construction for durability in high-pressure, high-cycle environments
• 1/4 inch body diameter suits compact hydraulic plumbing layouts

Compatibility

Designed as an OEM-style replacement or service fitting for hydraulic systems equipped with SAE O-Ring Boss ports accepting a 9/16-18 thread.

Installation Notes

Installation is performed by hydraulic technicians or qualified mechanics. Depressurize and lock out the hydraulic system completely before removing or installing any fittings. Inspect the O-ring sealing surface for damage prior to installation and replace the O-ring if worn or distorted. Torque to the fitting manufacturer and equipment OEM specifications only; do not over-tighten, as O-Ring Boss fittings rely on face seal contact, not thread interference, for leak prevention.