Heli-coil 5406-18 Thread Repair Kit M18 X 1.50 6 Inserts

Product Description

The HELI-COIL 5406-18 is a complete thread repair kit designed to restore damaged or stripped M18 x 1.50 metric fine threads to full OEM specification. The kit centers on a helical wire threaded insert measuring 27 millimeters in insert length, which anchors into a re-tapped bore to create a durable, wear-resistant thread form. Rated for metric fine thread standard, this kit is used by machinists, automotive technicians, heavy equipment mechanics, and industrial maintenance trades wherever a stripped M18 thread needs reliable restoration rather than replacement of the parent part.

This kit is suited for use in automotive engine components, transmission housings, aluminum castings, and industrial machinery where M18 x 1.50 metric fine threads are common. The self-contained nature of the kit means a technician can complete a thread repair in the field or at the bench without sourcing separate tooling. Six inserts are included, making the kit practical for multiple repairs on a single job or across repeat service calls.

Key Features

• M18 x 1.50 metric fine thread specification for precise fitment in fine-thread applications
• 27 millimeter insert length for deep, high-load thread engagement
• Includes drill bit, tap, installation tool, and tang removal tool - all tooling required for a complete repair
• 6 threaded inserts per kit, supporting multiple repairs from one package
• Installation tool part number 4973-18 and tap part number 4976-18 for easy replacement sourcing
• Insert package part number R3745-18 for reordering inserts independently

Compatibility

Designed for thread repair applications requiring M18 x 1.50 metric fine threaded inserts in metal parent materials such as aluminum, cast iron, or steel.

Installation Notes

Thread repair inserts of this type are installed by machinists or qualified mechanical technicians. Before starting, ensure the workpiece is fully de-energized, depressurized, and secured. The damaged thread must be drilled out to the specified oversize diameter and tapped with the included tap before the insert is driven in with the installation tool. Remove the drive tang with the included tang removal tool after the insert is seated; never leave the tang in pressurized or high-vibration assemblies.