Heli-coil A1084-2CN040 Free Running Insert M2 X 0.4

Product Description

The HELI-COIL A1084-2CN040 is a free running wire thread insert designed to create strong, wear-resistant internal threads in tapped holes. Manufactured from 304 stainless steel with a bright, uncoated finish, this insert accepts M2 x 0.4 metric coarse threads and measures 4.0 mm (0.1575 inches) in overall length, placing it in the 2D length-to-diameter ratio category. The tanged design simplifies installation using a standard Heli-Coil insertion tool. Machinists, maintenance technicians, and tool and die professionals install these inserts to repair stripped threads or reinforce threads in soft parent materials such as aluminum, magnesium, and plastic.

This insert is suited for light-duty fastener applications requiring reliable metric coarse thread repair or thread reinforcement at the M2 x 0.4 pitch. Typical applications include precision instrument assemblies, electronics hardware, and small-component thread restoration in both production and field-repair environments. The 2D length-to-diameter ratio provides a balanced holding strength for the M2 thread size without requiring excessive bore depth. This listing is for a single insert; minimum order quantity is 5 units per purchase.

Key Features

• M2 x 0.4 metric coarse thread profile for standard metric fastener compatibility
• 4.0 mm (0.1575 inches) overall insert length at 2D length-to-diameter ratio
• 304 stainless steel construction for corrosion resistance and durability
• Tanged design for controlled installation with a standard insertion tool
• Bright, uncoated finish with 7-3/4 free coils
• Single-piece packaging; MOQ of 5 units applies at order level

Compatibility

Designed as an OEM-style thread repair insert for tapped holes requiring M2 x 0.4 metric coarse internal threads in any parent material suitable for Heli-Coil style free running inserts.

Installation Notes

Installation should be performed by a qualified machinist or maintenance technician using the appropriate Heli-Coil insertion tool sized for M2 x 0.4 threads. The parent hole must be drilled and tapped to the correct Heli-Coil tap drill specification before insert installation. After seating the insert flush with or slightly below the parent surface, break off the tang using a tang break-off tool. Do not attempt to install the insert by hand or with improvised tooling, as coil damage and improper seating will result.