Parker 4-5 F5BU-S Bite-type Tube Connector 1/4 in Steel

Product Description

The PARKER 4-5 F5BU-S is a flareless bite-type tube straight thread connector designed for high-pressure hydraulic and fluid power applications. This straight-configuration fitting accepts a 1/4-inch tube OD and connects via a 1/2-20 UN UNF straight thread. It is manufactured from steel and rated to a maximum working pressure of 6,000 psi. The 24-degree flared angle and bite-type sleeve design create a secure, vibration-resistant seal without requiring a flared tube end. Licensed HVAC technicians, hydraulic system mechanics, and industrial plumbers install this type of fitting in pressurized fluid lines where reliable leak-free connections are critical.

This connector is suited for use in industrial hydraulic systems, mobile equipment fluid circuits, and high-pressure pneumatic or fluid power assemblies. Its straight thread design is commonly used where a port-to-tube connection must hold under sustained pressure cycling. The straight shape makes it appropriate for inline runs where a direct, non-angled transition is needed between tubing and a threaded port.

Key Features

• Flareless bite-type design eliminates the need for flared tube ends
• Rated to 6,000 psi maximum working pressure
• 1/2-20 UN UNF straight thread for secure port engagement
• Accepts 1/4-inch tube OD
• 24-degree flared angle sleeve geometry for positive bite and seal
• Steel construction for durability in high-pressure service

Compatibility

Designed as an OEM-style replacement or service fitting for high-pressure hydraulic and fluid power tube assemblies using 1/4-inch OD tubing and 1/2-20 UN UNF straight-thread ports.

Installation Notes

Installation should be performed by a qualified mechanic or pipefitter familiar with high-pressure hydraulic fittings. Depressurize and isolate the fluid circuit completely before removing or installing any fittings. Bite-type fittings require proper sleeve pre-setting per the manufacturer procedure to achieve a reliable seal; do not substitute flare-type sleeves. Consult applicable industry standards such as SAE J514 for assembly guidance on flareless bite-type connections.