Heli-coil A1185-7CN875 Free Running Insert 7/16-14 Unc

Product Description

The HELI-COIL A1185-7CN875 is a free running wire thread insert designed to install a strong, wear-resistant internal thread into tapped holes in soft or damaged base materials. Built from 304 stainless steel with a bright, uncoated finish, this tanged insert measures 0.875 inches in overall length at a 2D length-to-diameter ratio. It features 10-1/4 free coils and accepts a 7/16-14 UNC thread. Licensed electricians, mechanics, and maintenance technicians rely on this type of insert to restore or create threads in aluminum, cast iron, and other materials that cannot hold a standard fastener reliably over time.

This insert is suited for industrial maintenance, equipment repair, and OEM manufacturing applications where thread integrity is critical. The 7/16-14 UNC thread size is common across structural fasteners used in machinery, HVAC equipment frames, and mechanical assemblies. The tanged design allows for installation with a standard Heli-Coil installation tool, and the tang is broken off after installation to leave a clean internal thread. Sold individually, with a minimum order quantity of 5 units.

Key Features

• 304 stainless steel construction for corrosion resistance in demanding environments
• 7/16-14 UNC thread size compatible with standard inch-series fasteners
• 0.875 inches overall length at a 2D length-to-diameter ratio for deep thread engagement
• Tanged design for controlled installation using a standard Heli-Coil drive tool
• 10-1/4 free coils for full thread contact and load distribution
• Bright, uncoated finish suitable for use as-installed or with thread-locking compounds

Compatibility

Designed as an OEM-style thread repair and installation insert for tapped holes requiring a 7/16-14 UNC internal thread in soft, brittle, or worn base materials.

Installation Notes

Installation is typically performed by a machinist, maintenance technician, or qualified mechanic using a Heli-Coil or compatible wire thread insert installation tool sized for 7/16-14 UNC. The tapped hole must be prepared with the correct Heli-Coil tap before insert installation. After driving the insert to the proper depth, use a tang break-off tool to remove the tang from the installed insert. Always de-energize and lock out any equipment before performing thread repair work on live assemblies.