Heli-coil A1185-12CN1500 3/4-10 Unc Threaded Insert

Product Description

The HELI-COIL A1185-12CN1500 is a free running helical wire thread insert designed to create a permanent, wear-resistant internal thread in a drilled and tapped host material. Manufactured from 304 stainless steel with a bright, uncoated finish, this insert measures 1.5 inches in overall length and accepts a 3/4-10 UNC thread. It features a tanged installation design, allowing a standard HELI-COIL installation tool to drive the insert to the correct seated depth. With 13 free coils and a 2D length-to-diameter ratio, it provides full thread engagement suited for high-load fastening applications.

This insert is used in repair and original equipment manufacturing applications where internal threads have been stripped, damaged, or require reinforcement. Typical install scenarios include restoring threads in aluminum, cast iron, and soft-metal components across heavy equipment, industrial machinery, and structural assemblies. Trade professionals including machinists, millwrights, and maintenance mechanics rely on this size for large-fastener applications requiring durable thread repair without replacing the parent component.

Key Features

• 3/4-10 UNC thread size for large-diameter fastening applications
• 1.5 inches overall length with a 2D length-to-diameter ratio for strong thread engagement
• Tanged design for precise depth control during installation
• 304 stainless steel construction for corrosion resistance and durability
• 13 free coils provide consistent load distribution across the thread helix
• Bright, uncoated finish - no coating interference with thread tolerances

Compatibility

Designed as an OEM-style and repair replacement free running insert for applications using 3/4-10 UNC internal threads in metallic host materials.

Installation Notes

Installation requires a correctly sized HELI-COIL tap and installation tool for the 3/4-10 UNC thread series. Ensure the host material is securely fixtured and the tapped hole is clean and free of debris before inserting. After driving the insert to the specified seated depth, break off the installation tang using a tang break-off tool. Follow the manufacturer installation guide and applicable shop safety practices when operating drilling and tapping equipment.