Parker 4-6 F5OLO-S Straight Thread Connector 9/16-18 Steel

Product Description

The PARKER 4-6 F5OLO-S is a compression tube straight thread connector designed to join tubing to SAE O-ring boss ports in high-pressure hydraulic and fluid power systems. It features an O-Ring Face Seal (ORFS) tube end paired with an SAE-ORB straight thread port end, providing a leak-resistant connection that is well suited to demanding hydraulic circuits. The connector is manufactured from steel, carries a 9/16-18 UNF thread size, and accommodates 1/4-inch outside diameter tubing. With a maximum working pressure rating of 9,200 psi, it handles the pressure ranges common in industrial and mobile hydraulic applications. This fitting is typically installed by hydraulic technicians, millwrights, and plumbing professionals working on fluid power assemblies.

This connector is used in hydraulic and fluid power plumbing where a tube line must terminate into an SAE O-ring boss port on a valve, manifold, cylinder, or pump. The ORFS end provides a metal-to-metal face seal backed by an O-ring, minimizing leak paths even under pressure spikes. It is appropriate for both mobile equipment and stationary industrial hydraulic systems. The compact steel construction keeps installation tight in confined plumbing runs where space around port bosses is limited.

Key Features

• ORFS x SAE-ORB end connections for leak-resistant tube-to-port assembly
• 9/16-18 UNF thread size with O-Ring Face Seal interface
• Accepts 1/4-inch outside diameter tubing
• Maximum working pressure of 9,200 psi for demanding hydraulic service
• Steel construction for strength and durability in fluid power environments
• Single-piece package quantity — order individual fittings as needed

Compatibility

Designed as an OEM-style straight thread connector for hydraulic and fluid power systems requiring an ORFS tube connection to an SAE O-ring boss port with a 9/16-18 UNF thread size and 1/4-inch outside diameter tubing.

Installation Notes

Installation should be performed by a qualified hydraulic technician or pipefitter familiar with SAE O-ring boss and ORFS fitting standards. Depressurize and isolate the hydraulic circuit completely before removing or installing any fittings. Ensure the O-ring sealing surfaces on both the fitting and the mating port are clean and free of damage before assembly. Follow the fitting and equipment manufacturer guidelines for proper thread engagement and O-ring lubrication.