Heli-coil A1185-2CN164 Free Running Insert 8-32 Ss

Product Description

The HELI-COIL A1185-2CN164 is a free running helical wire threaded insert designed to restore or reinforce 8-32 UNC internal threads in parent materials that are worn, stripped, or too soft to hold fastener load on their own. Manufactured from 304 stainless steel with a bright, uncoated finish, this insert provides a hardened, corrosion-resistant thread form. At 0.164 inches overall length, it is sized to a 1D length-to-diameter ratio and features 3-1/2 free coils. The tanged design allows installation with a standard Heli-Coil drive tool and requires tang breakoff after seating. Installers in HVAC, electrical, and light mechanical service use this type of insert for thread repair in aluminum housings, thin-gauge brackets, and equipment enclosures.

This insert is suited for both original equipment assembly and field thread repair applications where an 8-32 UNC fastener interface is required. Typical use cases include restoring stripped threads in aluminum HVAC equipment panels, electrical enclosure mounting points, and light-duty mechanical assemblies. The 304 stainless steel construction makes it appropriate for environments with moderate moisture exposure. Sold as a single insert; minimum order quantity is 10 units.

Key Features

• 8-32 UNC thread size for standard inch-series fastener compatibility
• 304 stainless steel construction for corrosion resistance and durability
• 0.164 inches overall length at a 1D length-to-diameter ratio
• 3-1/2 free coils for full thread engagement within the installed length
• Tanged design compatible with standard Heli-Coil installation tooling
• Bright, uncoated finish - no coating to affect thread tolerance

Compatibility

Designed for use in any parent material tapped to accept an 8-32 UNC Heli-Coil free running insert, including aluminum, magnesium, cast iron, and thermoplastics. Requires an STI (Screw Thread Insert) tap and matched Heli-Coil installation tool for proper seating.

Installation Notes

Installation is performed using an STI tap sized for 8-32 inserts and the corresponding Heli-Coil drive mandrel. Ensure the tapped hole is clean and free of debris before driving the insert. After the insert is fully seated, break off the installation tang using a tang breakoff tool or needle-nose pliers. Power down any equipment being serviced before performing thread repair work on live assemblies.