Parker 4-4 Vbu-s Flareless Bite-type Male Elbow Steel

Product Description

The PARKER 4-4 VBU-S is a flareless bite-type tube male elbow fitting designed to create a secure, leak-resistant connection between a hydraulic or fluid-power tube and a male NPTF port. The fitting accepts 1/4-inch tube OD and threads into a 1/4-inch NPTF port at a 45-degree elbow angle, allowing directional routing of tubing in tight installations. Machined from steel for durability in high-pressure environments, it carries a maximum working pressure rating of 5,000 psi. The flareless bite-type design grips the tube mechanically without requiring a flare, simplifying assembly in the field. This fitting is installed by licensed hydraulic system technicians and fluid-power mechanics.

This elbow fitting is suited for use in hydraulic lines, fluid-power circuits, and instrumentation tubing systems where a 45-degree directional change is needed at a threaded port. Typical applications include industrial machinery, mobile hydraulic equipment, and high-pressure fluid-transfer systems. The NPTF thread form provides a pressure-tight mechanical seal without relying solely on a sealant. The 1/4-inch tube OD size is commonly found in instrument-grade and light hydraulic plumbing. The single-piece steel construction makes it appropriate for use in environments with vibration or mechanical stress where flared connections may loosen over time.

Key Features

• Flareless bite-type design grips 1/4-inch tube OD mechanically without a flare
• 45-degree elbow angle with a 24-degree flared seat for directional routing
• 1/4-inch NPTF male thread for pressure-tight port connections
• 5,000 psi maximum working pressure rating
• Steel construction for strength and resistance to mechanical stress

Compatibility

Designed as an OEM-style replacement or direct-install flareless bite-type fitting for hydraulic and fluid-power systems using 1/4-inch OD tubing and 1/4-inch NPTF ported components.

Installation Notes

This fitting is installed by qualified hydraulic technicians or fluid-power mechanics. Depressurize and bleed the hydraulic circuit fully before removing any existing fittings or connecting new ones. Use appropriate thread sealant or verify NPTF thread engagement is sufficient for the system pressure requirements per applicable standards. Follow the tube fitting manufacturer's assembly procedure for flareless bite-type fittings, including the proper number of turns past finger-tight, to ensure the ferrule seats correctly without over-tightening.