Heli-coil A4184-8CN160 M8 X 1.25 Screw-locking Insert 2D

Product Description

The HELI-COIL A4184-8CN160 is a tangless screw-locking helical wire insert designed to create a durable, vibration-resistant threaded hole in a parent material. Manufactured from Grade 304 stainless steel with a bright finish, this insert accepts an M8 x 1.25 metric coarse thread and provides a 2D length-to-diameter ratio with an overall length of 16 millimeters. The locking feature is built into the coil geometry, delivering a maximum locking torque of 6.00 Newton-meters and a minimum break-away torque of 0.80 Newton-meters. Machinists, maintenance technicians, and assembly professionals install this insert to repair stripped threads or to strengthen threads in soft base materials.

This insert is suited for precision thread repair and new thread installation in metalworking, manufacturing, and maintenance applications where corrosion resistance and thread integrity are critical. The tangless design eliminates the need for tang removal after installation, streamlining the installation process and reducing the risk of loose tang fragments in assemblies. It is appropriate for both production line use and field repair scenarios where M8 x 1.25 metric coarse thread specification is required.

Key Features

• M8 x 1.25 metric coarse thread for standard metric compatibility
• 2D length-to-diameter ratio with 16 millimeter overall length
• Tangless design eliminates post-installation tang removal step
• Grade 304 stainless steel construction for corrosion resistance
• Maximum locking torque of 6.00 Newton-meters for vibration resistance
• Bright finish with minimum outside diameter of 9.80 millimeters and maximum of 10.35 millimeters

Compatibility

Designed as a screw-locking threaded insert for use with M8 x 1.25 metric coarse threaded fasteners in applications requiring a tangless helical insert with a 2D engagement length.

Installation Notes

Installation requires a properly sized HELI-COIL tap to prepare the parent material bore to the correct diameter before inserting the coil. Power down any equipment and secure the workpiece before beginning thread repair or installation. A dedicated tangless installation tool is required to drive the insert to the correct depth without damaging the coil. Follow the insert manufacturer's installation guidelines and applicable torque specifications for the fastener used in the finished assembly.