Heli-coil A4184-6CN090 Screw-locking Insert M6 X 1.00

Product Description

The HELI-COIL A4184-6CN090 is a tangless screw-locking wire thread insert designed to repair or reinforce threaded holes in softer base materials. Manufactured from Grade 304 stainless steel with a bright finish, this insert accepts an M6 x 1.00 metric coarse thread and measures 9 mm in overall length, corresponding to a 1-1/2D length-to-diameter ratio. The locking feature is built into the coil geometry, providing a controlled interference fit that resists loosening under vibration without the need for adhesives or locking compounds. Maintenance technicians, assembly line mechanics, and field service professionals install this insert wherever thread integrity and corrosion resistance are required in a single fastener location.

This insert is suited for applications in industrial machinery, automotive assemblies, aerospace ground support equipment, and general metal fabrication where M6 metric coarse threads must be restored to full load-bearing capacity. The tangless design eliminates the tang-removal step required on standard HELI-COIL inserts, reducing installation time and the risk of leaving a broken tang inside the host bore. It is installed using a standard tangless installation tool matched to the M6 x 1.00 thread size.

Key Features

• Tangless design eliminates tang-removal after installation, streamlining workflow
• Grade 304 stainless steel construction provides corrosion resistance in wet or chemically exposed environments
• Maximum locking torque of 3.00 N/m with a minimum breakaway torque of 0.40 N/m for controlled thread locking
• 1-1/2D length-to-diameter ratio delivers a robust thread engagement depth relative to the M6 thread pitch
• Minimum outside diameter of 7.40 mm and maximum outside diameter of 7.95 mm for consistent fit in properly prepared bores
• Bright finish with 6-3/4 free coils for uniform load distribution across the insert length

Compatibility

Designed as an OEM-style replacement or new-installation insert for M6 x 1.00 metric coarse threaded applications requiring a tangless screw-locking wire thread insert in Grade 304 stainless steel.

Installation Notes

Installation requires a properly drilled and tapped STI (Screw Thread Insert) tap to prepare the host bore to the correct oversize dimension before the insert is driven in. Power down or de-energize any equipment before thread repair work begins. Use only the tangless installation tool specified for M6 x 1.00 inserts to avoid distorting the coil. Follow applicable torque and assembly standards for the host equipment when reinstalling fasteners after insert placement.