Heli-coil A3585-6CNW750 Screw-locking Insert 3/8-16 Unc

Product Description

The HELI-COIL A3585-6CNW750 is a tangless screw-locking helical coil insert designed to create durable, vibration-resistant threaded repairs or new thread installations in parent materials. Manufactured from Grade 304 stainless steel with a dry film lubricant finish, this insert accepts a 3/8-16 UNC thread at a 2D length-to-diameter ratio and an overall length of 0.75 inches. It delivers a maximum locking torque of 80 in/lb and a minimum breakaway torque of 12 in/lb. The tangless design eliminates the need to remove a installation tang after driving, streamlining the installation workflow on production lines and field repair applications.

This insert is suited for use in aerospace, industrial, and mechanical applications where thread stripping, galling, or parent material wear require a reliable stainless steel reinforcement. The 304 stainless steel construction resists corrosion in moderate chemical and moisture environments. Typical install scenarios include thread repair in aluminum housings, cast components, and softer base materials where higher-strength thread engagement is required. A single insert is included per package, with a minimum order quantity of 5 units.

Key Features

• Tangless design eliminates post-installation tang removal, reducing assembly time and debris risk
• Grade 304 stainless steel construction for corrosion resistance in demanding service environments
• Dry film lubricant finish reduces galling and eases consistent torque application during installation
• Maximum locking torque of 80 in/lb with a minimum breakaway torque of 12 in/lb for secure thread retention
• 3/8-16 UNC thread standard at 2D ratio provides strong thread engagement in a compact 0.75-inch length
• 10 free coils for uniform load distribution across the engaged thread length

Compatibility

Designed as a standard helical coil threaded insert replacement for applications requiring 3/8-16 UNC thread reinforcement in soft or worn parent materials. Verify tapped hole dimensions against the required outside diameter range of 0.452 to 0.472 inches before installation.

Installation Notes

Installation is typically performed by a machinist or maintenance technician using a HELI-COIL compatible tangless installation tool sized for 3/8-16 UNC inserts. The parent material must be tapped with the correct STI (Screw Thread Insert) tap before the insert is driven. Always ensure the host bore is clean and free of debris before installation. Do not reuse a removed insert, as the locking feature and coil geometry may be compromised.