Heli-coil A3585-6CNW562 Screw-locking Insert 3/8-16 Unc

Product Description

The HELI-COIL A3585-6CNW562 is a tangless screw-locking helical coil insert designed to create durable, vibration-resistant threaded repairs and original installations in metal assemblies. Built from Grade 304 stainless steel with a dry film lubricant finish, this insert accepts a 3/8-16 UNC fastener and delivers a length-to-diameter ratio of 1-1/2D. At 0.562 inches overall length, it fits compact boss depths while providing a maximum locking torque of 80 inch-pounds and a minimum break-away torque of 12 inch-pounds. Machinists, maintenance technicians, and assembly professionals install these inserts to restore or reinforce stripped or worn threads in parent materials ranging from aluminum to cast iron.

This insert is suited for both original equipment manufacturing and field repair applications where a reliable UNC thread form is required in a corrosion-resistant installation. The 1-1/2D length ratio is commonly used in medium-duty fastening situations where moderate thread engagement depth is available. The tangless design eliminates the need for tang removal after installation, reducing assembly steps and the risk of debris contamination in blind holes. It is appropriate for use in industrial, commercial, and marine environments where stainless steel corrosion resistance is necessary.

Key Features

• Grade 304 stainless steel construction resists corrosion in demanding service environments
• Tangless design requires no tang break-off after installation, simplifying blind-hole applications
• Dry film lubricant finish eases installation and helps achieve consistent torque values
• Maximum locking torque of 80 inch-pounds provides secure resistance to fastener back-out under vibration
• Minimum break-away torque of 12 inch-pounds confirms positive locking engagement
• 7-1/4 free coils and 0.562 inches overall length suit shallow-to-medium boss depths

Compatibility

Designed as an OEM-style thread insert for parent material tapped to accept a 3/8-16 UNC helical coil insert with an outside diameter range of 0.452 to 0.472 inches.

Installation Notes

Installation requires a HELI-COIL or compatible tangless insert installation tool sized for 3/8-16 UNC inserts. The parent material must be drilled and tapped with the correct HELI-COIL tap to achieve proper outside diameter fit before the insert is driven in. Power down or de-energize any assembly before performing thread repair on components in live systems. Follow the insert manufacturer's installation instructions for proper seating depth to ensure the insert sits flush with or just below the parent material surface.