Parker PT-00556 Flareless Bite-type Tube Union 6 Mm Steel

Product Description

The PARKER PT-00556 is a flareless bite-type tube union designed for straight-through tube connections in high-pressure hydraulic and instrumentation systems. Engineered in steel, this fitting uses a bite-type ferrule mechanism that grips the tube OD directly, eliminating the need for pre-flaring. It accommodates a 6 mm tube outside diameter and carries a maximum working pressure of 500 bar. With an overall length of 24 mm and a 12 mm hex, it fits cleanly into tight plumbing runs. Hydraulic technicians and instrumentation fitters install this type of fitting in industrial, mobile, and process-control applications where tube flaring is impractical or prohibited.

This union is suited for steel tubing circuits in industrial hydraulic systems, machine tool plumbing, and fluid power assemblies. The straight union configuration allows in-line tube-to-tube connections where both tube ends meet along the same axis. It is commonly installed in systems requiring leak-free performance under sustained high-pressure conditions. The bite-type design conforms to standard metric tube fitting practices used across European and internationally specified fluid power systems.

Key Features

• Flareless bite-type design grips 6 mm tube OD without pre-flaring
• Steel construction for high-pressure hydraulic service
• Maximum working pressure of 500 bar
• Straight union body for in-line tube-to-tube connections
• 12 mm hex size for standard wrench installation
• 24 mm overall length for compact plumbing runs

Compatibility

Designed as an OEM-style replacement or service fitting for metric flareless tube circuits using 6 mm outside diameter steel tubing in high-pressure hydraulic and instrumentation plumbing systems.

Installation Notes

Installation should be performed by a qualified hydraulic technician or fluid power professional. Depressurize and isolate the hydraulic circuit fully before removing or installing any tube fittings. Ensure the tube end is cut square and deburred before seating the ferrule. Follow the fitting manufacturer presetting procedure for bite-type ferrules to achieve a proper seal prior to final assembly under pressure.