Parker 4 F5BU-S Bite-type Tube Connector 1/4 in Steel

Product Description

The PARKER 4 F5BU-S is a flareless bite-type tube straight thread connector designed for high-pressure hydraulic and fluid power systems. It uses a 24-degree flared angle and a 7/16-20 UN UNF straight thread to form a leak-resistant mechanical connection without requiring a flared tube end. Rated to 6,000 psi maximum working pressure, it is built from steel for durability in demanding industrial and mobile hydraulic applications. The straight fitting shape routes tubing in-line with the port. Installation is performed by licensed fluid power technicians and experienced trade mechanics working on hydraulic circuits, machine tools, and industrial fluid lines.

This connector is suited for use in hydraulic systems, fluid power circuits, and related plumbing where a flareless, bite-type tube end is required at a straight-thread port. The 1/4 inch tube OD size fits standard small-bore hydraulic tubing. It is a common choice in industrial machinery, mobile equipment, and process fluid systems that specify UN or UNF straight-thread port connections and operate at elevated working pressures up to 6,000 psi.

Key Features

• Flareless bite-type design — no tube flaring required before assembly
• Rated to 6,000 psi maximum working pressure
• 7/16-20 UN UNF straight thread for secure port engagement
• 24-degree flared angle for proper sleeve bite and seal
• Steel construction for high-pressure and high-cycle durability
• Straight fitting shape for in-line tube routing

Compatibility

Designed as an OEM-style replacement or service fitting for hydraulic and fluid power systems requiring a flareless bite-type straight thread connector with a 1/4 inch tube OD and 7/16-20 UN UNF thread.

Installation Notes

Installation should be performed by a qualified fluid power technician or licensed mechanic familiar with high-pressure hydraulic systems. Depressurize and isolate the hydraulic circuit completely before removing or installing any fittings. Follow the fitting manufacturer's assembly procedure for bite-type fittings, which typically requires a presetting step to seat the sleeve before final torque — do not over-tighten. Verify thread compatibility and tube OD before assembly to prevent cross-threading or incomplete bite.