Heli-coil A1185-6CN750 3/8-16 Unc Insert 0.75in Ss Tanged

Product Description

The HELI-COIL A1185-6CN750 is a free-running wire thread insert designed to create or restore strong, durable internal threads in a tapped hole. The insert is manufactured from 304 stainless steel with a bright, uncoated finish and measures 0.75 inches in overall length, corresponding to a 2D length-to-diameter ratio for the 3/8-16 UNC thread size. It uses a tanged design for installation, allowing a standard installation tool to drive and seat the insert. Machinists, maintenance technicians, and field mechanics install these inserts to repair stripped threads or to provide wear-resistant threaded inserts in softer base materials such as aluminum or cast iron.

This insert is suited for applications in manufacturing, industrial maintenance, and field repair work where a 3/8-16 UNC threaded hole requires reinforcement or restoration. With 10 free coils, the insert provides full thread engagement across its 0.75-inch length. It is commonly used in automotive, aerospace, and general mechanical assemblies where thread pullout resistance and corrosion resistance are required. The bright stainless steel finish makes it appropriate for environments with exposure to moisture or mild corrosive conditions.

Key Features

• 3/8-16 UNC thread size with 0.75-inch (3/4 inch) overall insert length
• Tanged design for use with standard HELI-COIL installation tools
• 304 stainless steel construction for corrosion resistance and durability
• Bright, uncoated finish - no coating to affect thread tolerances
• 10 free coils providing full-length thread engagement at a 2D length-to-diameter ratio
• Single insert per package; minimum order quantity of 5 units

Compatibility

Designed for use in any tapped hole requiring a 3/8-16 UNC free-running wire thread insert. Requires a matching HELI-COIL tap and installation tool sized for 3/8-16 inserts.

Installation Notes

Installation is typically performed by machinists or maintenance mechanics using a dedicated HELI-COIL tap to prepare the hole oversize, followed by an installation tool matched to the 3/8-16 insert size. After driving the insert to the correct depth, the tang is broken off using a tang break-off tool if clearance is required. Always verify the tapped hole is clean and free of debris before inserting. Follow applicable shop standards and torque specifications for the fastener used in the installed insert.