Heli-coil A3585-2CNPF164 Screw-locking Insert 8-32 Unc

Product Description

The HELI-COIL A3585-2CNPF164 is a tangless screw-locking helical wire insert designed to create a strong, vibration-resistant threaded repair or original installation in a host material. Manufactured from Grade 304 stainless steel with a primer-free finish, this insert accepts 8-32 UNC fasteners and installs at a 1D length-to-diameter ratio, with an overall length of 0.164 inches. The coil design provides a locking function with a maximum locking torque of 9 inch-pounds and a minimum breakaway torque of 1.50 inch-pounds. Machinists, maintenance technicians, and assembly professionals install this type of insert in metalworking, aerospace, and industrial maintenance applications where thread integrity is critical.

This insert is suited for use in ferrous and non-ferrous base materials where a durable, corrosion-resistant 8-32 UNC internal thread is required. The tangless design eliminates the need to remove a tang after installation, reducing installation time and preventing loose tang debris inside assembled components. It is commonly used in precision assemblies, housings, and enclosures where contamination from tang removal is a concern. The primer-free finish is compatible with clean-room and close-tolerance installations.

Key Features

• Tangless design eliminates post-installation tang removal and reduces debris risk
• Grade 304 stainless steel construction provides corrosion resistance in demanding environments
• Maximum locking torque of 9 inch-pounds helps resist fastener back-out under vibration
• Minimum breakaway torque of 1.50 inch-pounds ensures controlled re-entry access
• Primer-free finish compatible with clean and close-tolerance assemblies
• 3-1/2 free coils with outside diameter range of 0.205 to 0.220 inches for secure seating in the host bore

Compatibility

Designed as an OEM-style replacement or original installation insert for applications requiring an 8-32 UNC internal thread with a 1D length-to-diameter ratio in a host material prepared to accept a standard helical insert bore diameter.

Installation Notes

Machinist or maintenance technician installation is typical; the host material must be drilled and tapped to the correct insert tap size for 8-32 UNC before the insert is driven in using a compatible tangless insert installation tool. Power down and de-energize any equipment before performing thread repair or insert installation on live assemblies. Do not use a standard tang-type installation tool with tangless inserts, as the drive geometry is not interchangeable. Follow applicable facility safety and torque verification procedures after installation.