Heli-coil A1185-8CN500 Free Running Insert 1/2-13 Unc

Product Description

The HELI-COIL A1185-8CN500 is a free running helical coil threaded insert designed to create or restore strong, durable threads in tapped holes. With a 1/2-13 UNC thread size and an overall length of 0.5 inches (1D length-to-diameter ratio), this insert is manufactured from 304 stainless steel with a bright, uncoated finish. The tanged design allows for installation using a standard Heli-Coil insertion tool, then tang removal after seating. Machinists, maintenance technicians, and field repair crews use these inserts to repair stripped or damaged threads in metal components across industrial, HVAC, and mechanical service applications.

This insert is suited for applications requiring a reliable UNC thread repair or thread reinforcement in aluminum, cast iron, magnesium, or other softer base materials. The 1/2-13 thread size is common in structural fastener applications, equipment housings, and mechanical assemblies. At 0.5 inches in length, it is appropriate for thinner material sections or shallow-boss thread repairs. The 1D length-to-diameter ratio makes it a standard fitment for most general-purpose thread repair needs.

Key Features

• 1/2-13 UNC thread size for compatibility with standard fractional fasteners
• 0.5 inches overall length with 1D length-to-diameter ratio for shallow-boss installations
• 304 stainless steel construction for corrosion resistance in demanding environments
• Tanged design enables controlled installation with a standard insertion tool
• Bright, uncoated finish - no plating to affect thread tolerance
• 4-7/8 free coils for consistent thread engagement along the insert length

Compatibility

Designed as a standard free running helical coil insert for 1/2-13 UNC tapped holes requiring thread repair or reinforcement in metal base materials.

Installation Notes

Installation is performed by a machinist or qualified technician using the appropriately sized Heli-Coil tap and installation tool for 1/2-13 inserts. The parent material must be drilled and tapped to the correct oversize specification before inserting. Once the insert is driven to the proper depth, the drive tang is broken off using a tang break-off tool. Always de-energize and lock out any equipment before performing thread repair work on machinery or assemblies.