Heli-coil A3585-2CNW492 Screw-locking Insert 8-32 Unc

Product Description

The HELI-COIL A3585-2CNW492 is a screw-locking helical coil threaded insert designed to create a strong, vibration-resistant internal thread in a tapped hole. Constructed from Grade 304 stainless steel with a dry film lubricant finish, this tangless insert measures 0.492 inches in overall length at a 3D length-to-diameter ratio for the 8-32 UNC thread size. The locking feature is built into the coil geometry, eliminating the need for a tang removal step after installation. Licensed machinists, maintenance technicians, and assembly professionals use this insert to restore or reinforce threaded connections in metal components.

This insert is suited for applications where thread locking and corrosion resistance are both required, including aerospace, marine, industrial equipment, and precision machinery. The tangless design is preferred in blind-hole applications and automated assembly environments where tang removal is impractical or risks contamination. Grade 304 stainless steel construction holds up in wet or chemically active service environments. The 8-32 UNC thread size is common in light mechanical assemblies, electronics enclosures, and instrument panels where small-diameter fasteners carry moderate loads.

Key Features

• Tangless design eliminates tang breakoff, reducing debris and simplifying blind-hole installation
• Grade 304 stainless steel construction provides corrosion resistance in wet and chemical environments
• Dry film lubricant finish aids installation torque control and reduces galling
• Maximum locking torque of 9 inch-pounds with minimum breakaway torque of 1.50 inch-pounds
• 13-1/4 free coils at 3D length-to-diameter ratio for full thread engagement
• Outside diameter range of 0.205 to 0.220 inches for proper fit in standard tapped holes

Compatibility

Designed as an OEM-style screw-locking insert for tapped holes requiring 8-32 UNC internal threads in metal or engineered plastic parent materials.

Installation Notes

Installation requires a correctly sized HELI-COIL tap and installation tool matched to the 8-32 UNC thread size and 3D insert length. Power down or de-energize any equipment before performing thread repair or insert installation on live assemblies. The tangless design requires a tangless-compatible installation mandrel - do not attempt installation with tools designed for tang-style inserts. Follow applicable torque and thread engagement specifications from the equipment OEM or relevant standards such as ASME B1.1.