Heli-coil AT1185-02C086 Free Running Insert 2-56 Unc

Product Description

The HELI-COIL AT1185-02C086 is a tangless free running helical wire insert designed to create strong, wear-resistant threaded holes in parent materials that cannot hold a reliable thread on their own. Built from 304 stainless steel with a bright, uncoated finish, this insert accepts a 2-56 UNC thread and measures 0.086 inches in overall length, placing it in the 1D length-to-diameter ratio category. The free running design allows rotation during installation and removal without locking. Tangless construction eliminates the need for tang break-off after installation, reducing debris and saving time on the assembly line or in the field.

This insert is suited for light-duty threaded repair and original equipment manufacturing applications where a 2-56 UNC thread form is required in softer or worn base materials. Typical use cases include precision instrument housings, electronic enclosures, aerospace assemblies, and small-pitch threaded bores in aluminum or magnesium castings. The 304 stainless steel construction provides corrosion resistance suitable for general industrial and light marine environments. It is sold as a single insert with a minimum order quantity of 100 pieces.

Key Features

• Tangless design eliminates post-installation tang removal and reduces debris risk
• 2-56 UNC thread size for small-pitch fastening applications
• 0.086 inches overall length at a 1D length-to-diameter ratio
• 304 stainless steel construction with bright, uncoated finish for corrosion resistance
• 3 free coils provide consistent thread engagement in the installed bore
• Free running coil type allows smooth rotation without locking behavior

Compatibility

Designed as an OEM-style thread repair and thread reinforcement insert for tapped holes requiring a 2-56 UNC thread form in parent materials such as aluminum, magnesium, or other soft metals and plastics.

Installation Notes

Installation requires a properly sized HELI-COIL tap and a compatible tangless installation tool for the 2-56 insert series. The parent hole must be drilled and tapped to the correct HELI-COIL tap drill size before insert installation. Ensure the work area is clean and free of chips before driving the insert. Tangless inserts do not require a tang extraction step after seating, but the installed thread should be inspected with a go/no-go gauge before returning the assembly to service.