Heli-coil AT3585-2C246 Screw-locking Insert 8-32 Unc

Product Description

The HELI-COIL AT3585-2C246 is a tangless screw-locking helical wire insert designed to create or restore strong, vibration-resistant threads in tapped holes. Built from Grade 304 stainless steel with a bright finish, it accepts an 8-32 UNC screw thread and measures 0.246 inches in overall length at a 1-1/2D length-to-diameter ratio. The insert features 6 free coils and delivers a maximum locking torque of 9 in/lb with a minimum breakaway torque of 1.50 in/lb. Maintenance technicians, machinists, and assembly professionals install these inserts to protect parent material threads from wear, stripping, or corrosion in demanding environments.

This insert is suited for use in metal assemblies, industrial equipment, and precision mechanical applications where stainless steel fastener compatibility and vibration resistance are required. The tangless design eliminates the need for tang break-off after installation, streamlining the installation process in production or field repair settings. It is commonly used in aerospace, marine, food processing, and general industrial applications where corrosion resistance is a priority.

Key Features

• Tangless design eliminates tang removal step during installation
• Grade 304 stainless steel construction provides corrosion resistance in harsh environments
• 8-32 UNC thread standard for broad fastener compatibility
• Maximum locking torque of 9 in/lb resists loosening under vibration
• Minimum breakaway torque of 1.50 in/lb ensures controlled removability
• Bright finish with 6 free coils at a 1-1/2D length-to-diameter ratio

Compatibility

Designed as an OEM-style threaded insert replacement for applications requiring 8-32 UNC thread repair or reinforcement in metal parent materials.

Installation Notes

Installation requires a properly sized HELI-COIL tap and the appropriate tangless installation tool for 8-32 UNC inserts. Ensure the parent material hole is tapped to the correct thread form and depth before driving the insert. Power down or de-energize any equipment before performing thread repair on live assemblies. Follow the manufacturer's installation tool specifications and applicable torque guidelines for the application.