Heli-coil A3585-6CN562 Screw-locking Insert 3/8-16 Unc

Product Description

The HELI-COIL A3585-6CN562 is a tangless screw-locking helical coil insert designed to create strong, vibration-resistant threaded connections in parent materials that require reliable fastening. Built from Grade 304 stainless steel with a bright finish, this insert accepts a 3/8-16 UNC thread and measures 0.562 inches overall length, corresponding to a 1-1/2D length-to-diameter ratio. It features 7-1/4 free coils and delivers a maximum locking torque of 80 in/lb with a minimum break-away torque of 12 in/lb. Machinists, maintenance technicians, and assembly professionals install these inserts to restore or reinforce threads in aluminum, cast iron, and other base materials.

This insert is suited for industrial, commercial, and MRO applications where a 3/8-16 UNC threaded hole requires locking thread repair or original equipment thread reinforcement. The tangless design eliminates the need for tang break-off after installation, making it well-suited for blind-hole installations and applications where loose tangs cannot be tolerated. The stainless steel construction resists corrosion, making it appropriate for environments exposed to moisture, mild chemicals, or temperature cycling.

Key Features

• Tangless design - no tang removal step required after installation, suitable for blind holes
• Grade 304 stainless steel construction with bright finish for corrosion resistance
• 3/8-16 UNC thread size, 1-1/2D length-to-diameter ratio, 0.562 inches overall length
• Maximum locking torque of 80 in/lb with minimum break-away torque of 12 in/lb
• 7-1/4 free coils for consistent thread engagement across the insert length
• Outside diameter range of 0.452 to 0.472 inches for precise installation fit

Compatibility

Designed as an OEM-style screw-locking insert for applications requiring a 3/8-16 UNC internal thread with a 1-1/2D insert length in a standard helical coil installation.

Installation Notes

Installation requires a properly sized HELI-COIL tap to prepare the parent material hole before inserting; standard drill-and-tap procedures apply. Power down or de-energize any assembly before performing thread repair work on live equipment. A dedicated tangless installation tool is required to drive and seat this insert correctly - do not attempt installation with standard screwdrivers or improvised tools. Inspect the finished insert for proper seating and verify thread engagement before returning the assembly to service.