Heli-coil A1185-8EN500 Free Running Insert 1/2-13 Unc

Product Description

The HELI-COIL A1185-8EN500 is a free running wire thread insert designed to repair or reinforce 1/2-13 UNC threaded holes in metal components. Manufactured from stainless steel, this tanged insert installs into a pre-drilled and tapped hole to create a durable internal thread that meets or exceeds the strength of the parent material. The 0.5 inch overall length corresponds to a 1D length-to-diameter ratio, making it well suited for applications where material thickness is limited. Machinists, maintenance technicians, and mechanical contractors install this type of insert during production builds or field thread-repair operations.

This insert is used across industrial, commercial, and mechanical maintenance applications where 1/2-13 UNC threads require restoration or reinforcement. Typical install scenarios include repairing stripped bolt holes in castings, housings, and structural assemblies made from aluminum, cast iron, or softer alloys. The tanged style allows the insert to be driven with a standard installation tool; the tang is then broken off after seating to complete the installation. This particular insert is sold individually, with a minimum order quantity of 5 units.

Key Features

• 1/2-13 UNC thread size for compatibility with standard unified coarse fastener applications
• 0.5 inch overall length with a 1D length-to-diameter ratio for shallow-material installations
• Stainless steel construction provides corrosion resistance and long service life
• Tanged design works with standard HELI-COIL installation tooling for consistent seating depth
• 4-7/8 free coils deliver full thread engagement across the insert length

Compatibility

Designed as a standard 1/2-13 UNC free running threaded insert for use with HELI-COIL installation tooling and compatible third-party insert drivers sized for 1/2-13 applications.

Installation Notes

Installation is typically performed by machinists or mechanical technicians using the correct HELI-COIL tap and installation mandrel for the 1/2-13 insert size. The parent material must be drilled and tapped to the appropriate HELI-COIL insert tap dimension before installation. After driving the insert to the specified depth, break off the tang using a tang break-off tool; never leave the tang in a blind hole without verification that it has fully separated. Follow the tool manufacturer's torque and procedure guidelines for the host material type.