Heli-coil 5403-7 Thread Repair Kit M7x1 18 Inserts

Product Description

The HELI-COIL 5403-7 is a complete metric thread repair kit designed to restore damaged or stripped M7x1 Metric Coarse internal threads to full load-bearing specification. The kit includes a drill, tap, installation tool, and tang removal tool, along with 18 wire-thread inserts sized at 10.5mm insert length. Licensed trades and maintenance machinists use this kit to rehabilitate threaded bores in aluminum, cast iron, magnesium, and other materials without replacing the host component. All included tooling is matched to the M7x1 thread form, eliminating the guesswork of sourcing compatible components separately.

This kit is suited for repair work in automotive, industrial, and general mechanical applications where M7x1 Metric Coarse threads have been cross-threaded, stripped, or otherwise damaged. The 18 included inserts are split into groups of 6, allowing multiple repair attempts or multiple bores to be addressed from a single kit. It is appropriate for shop use, field service, and production repair environments where restoring original thread integrity is required without machining a replacement part.

Key Features

• Complete kit includes drill, tap, installation tool, and tang removal tool - no separate sourcing required
• M7x1 Metric Coarse thread form for broad compatibility with metric fastener applications
• 18 wire-thread inserts included, 6 inserts per size length group
• 10.5mm insert length for secure thread engagement depth
• Tang removal tool size 7/32 included for clean post-installation finishing
• Installation tool part number 3747-7 and tap part number 2087-7 are matched components

Compatibility

Designed as an OEM-style thread repair solution for M7x1 Metric Coarse threaded bores in metal components across automotive, industrial, and mechanical service applications. Insert package part number R1084-7 is available separately for insert restocking.

Installation Notes

Thread repair inserts of this type are installed by machinists or qualified mechanics using the included drill, tap, and driver tools in sequence. Always secure and support the workpiece before drilling or tapping to maintain bore alignment. Follow standard shop safety practices including eye protection and appropriate speeds for the host material. Break off the tang after insert installation using the included 7/32 tang removal tool.