Heli-coil A1084-16CN240 Free Running Insert M16 X 2

Product Description

The HELI-COIL A1084-16CN240 is a free-running helical wire thread insert designed to create or restore strong, precision-threaded holes in parent materials softer than the fastener. Made from 304 stainless steel with a bright, uncoated finish, this insert accepts M16 x 2.0 metric coarse fasteners and measures 0.945 inches (24 mm) overall in length, placing it in the 1-1/2D length-to-diameter ratio category. It ships with a tang for installation with a standard HELI-COIL installation tool, which drives the insert into the prepared tapped hole. Maintenance technicians, machinists, and field service techs install these in worn or damaged threaded bores across industrial, automotive, and mechanical applications.

This insert is suited for metric coarse threaded applications requiring a durable, corrosion-resistant repair or original equipment thread form. With 9-3/4 free coils, it provides full thread engagement depth appropriate for M16 fastener loading. Typical install scenarios include engine blocks, gearbox housings, structural brackets, and any cast or machined component where thread stripping is a concern. The 1-1/2D length is a common selection for general-purpose fastener loads in steel, aluminum, and cast iron parent materials.

Key Features

• M16 x 2.0 metric coarse thread form for standard fastener compatibility
• 304 stainless steel construction resists corrosion in demanding environments
• 24 mm (0.945 inches) overall length at 1-1/2D ratio for balanced thread engagement
• 9-3/4 free coils provide consistent thread form throughout the bore
• Tanged design works with standard HELI-COIL series installation tools
• Bright, uncoated finish maintains dimensional accuracy of the installed thread

Compatibility

Designed for use in any application requiring a free-running M16 x 2.0 metric coarse thread insert, including thread repair and original equipment installations in aluminum, cast iron, steel, and similar parent materials.

Installation Notes

Installation requires a properly sized HELI-COIL tap to prepare the parent bore before insert placement. Use the designated installation tool to drive the tanged insert to the correct depth; the tang is broken off after seating using a tang break-off tool. Power down or de-energize any associated equipment before accessing threaded bores in live assemblies. Follow applicable torque and fastener specifications for the parent assembly rather than values specific to the insert alone.