Parker FM18LCF Flareless Bite-type Dual Function Nut 18mm

Product Description

The PARKER FM18LCF is a flareless bite-type dual function nut designed for use in high-pressure hydraulic and fluid power tube assemblies. Machined from steel, this metric fitting nut accommodates an 18 mm tube OD with an M26x1.5 thread and is rated to a maximum working pressure of 400 bar. The dual function design allows the nut to serve both as a standard tube nut and as a part of the bite-type ferrule retention system, reducing the number of separate components required at the fitting joint. Licensed plumbers, hydraulic system technicians, and fluid power specialists install this type of fitting nut in industrial, mobile, and process piping systems where reliable tube-to-fitting connections are critical.

This fitting nut is suited for metric tube assemblies in industrial hydraulic circuits, mobile equipment fluid systems, and process piping applications. The M26x1.5 metric thread and 18 mm tube OD sizing place it in medium-bore hydraulic line configurations commonly found in manufacturing, heavy equipment, and off-highway machinery. Its steel construction makes it appropriate for high-pressure service environments where corrosion exposure is manageable through system design or plating.

Key Features

• Dual function nut design combines standard tube nut and bite-type ferrule retention in a single component
• Rated to 400 bar maximum working pressure for high-pressure hydraulic service
• M26x1.5 metric thread for compatibility with metric flareless fitting bodies
• 18 mm tube OD sizing for medium-bore hydraulic and fluid power lines
• Steel construction for strength and durability in industrial service conditions
• Compact 18 mm overall length supports tight-clearance installations

Compatibility

Designed as an OEM-style replacement or service component for metric flareless bite-type tube fitting assemblies requiring an 18 mm tube OD dual function nut with M26x1.5 thread.

Installation Notes

Installation of flareless bite-type fitting nuts should be performed by qualified hydraulic or fluid power technicians following the fitting manufacturer's assembly procedure for pre-swaging or in-line swaging of the ferrule. Depressurize and isolate the system completely before disassembling any hydraulic line. Use the correct tube OD and fitting body to ensure full ferrule engagement. Do not substitute SAE or BSPP fittings for metric-threaded components in this assembly.