Heli-coil A1084-8CN200 Free Running Insert M8 X 1.25

Product Description

The HELI-COIL A1084-8CN200 is a free running wire thread insert designed to create strong, wear-resistant threaded holes in parent materials that require metric coarse thread engagement. Manufactured from 304 stainless steel with a bright, uncoated finish, this tanged insert measures M8 x 1.25 in thread size with an overall length of 20 millimeters (0.7874 inches), yielding a 2-1/2D length-to-diameter ratio. It provides 13-1/4 free coils for reliable thread engagement. Machinists, maintenance technicians, and MRO professionals install these inserts to repair stripped threads or to establish durable threaded inserts in new assemblies across a wide range of industrial and mechanical applications.

This insert is suited for use in ferrous and non-ferrous base materials where a metric M8 x 1.25 thread form is required. Typical applications include thread repair in engine components, aluminum housings, castings, and fabricated assemblies where the parent thread has been stripped or where added thread strength is needed. The 304 stainless steel construction makes it appropriate for environments where corrosion resistance is a priority. Each unit is sold individually, with a minimum order quantity of 5 units.

Key Features

• M8 x 1.25 metric coarse thread size for standard metric fastener compatibility
• 20 millimeter overall length with a 2-1/2D length-to-diameter ratio for deep thread engagement
• 304 stainless steel construction provides corrosion resistance and long service life
• Tanged design for use with standard Heli-Coil installation tooling
• 13-1/4 free coils deliver consistent load distribution along the thread form
• Bright, uncoated finish maintains close dimensional tolerances

Compatibility

Designed for use in any application requiring an M8 x 1.25 metric coarse free running wire thread insert; requires a compatible Heli-Coil tap and installation tool sized for M8 x 1.25.

Installation Notes

Installation is typically performed by a machinist or qualified maintenance technician using a Heli-Coil tap to prepare the parent hole, followed by the appropriate installation tool to drive the insert to the correct depth. Always power down and de-energize any equipment before performing thread repair on installed components. After installation, the tang must be broken off using a tang break-off tool; inspect the bore to confirm the tang has been fully removed before reassembly. Follow the insert manufacturer's drilling and tapping specifications for the parent material to ensure proper fit and holding strength.