Heli-coil A1084-2.5CN038 Free Running Insert M2.5 X 0.45

Product Description

The HELI-COIL A1084-2.5CN038 is a free running wire thread insert designed to create strong, wear-resistant internal threads in soft or damaged base materials. Manufactured from 304 stainless steel with a bright, uncoated finish, this insert measures 3.8 mm (0.1496 inches) in overall length and is designed for M2.5 x 0.45 metric coarse thread applications. The tanged design allows for installation using standard HELI-COIL tooling. Machinists, maintenance technicians, and assembly professionals install these inserts to restore or reinforce threaded holes in aluminum, magnesium, plastics, and other materials where thread stripping is a concern.

This insert is suited for precision fastening applications in manufacturing, MRO, and field repair scenarios where a durable, corrosion-resistant internal thread is required. The 1-1/2D length-to-diameter ratio provides a balance of thread engagement strength and installation depth appropriate for thin-section or shallow-boss components. The M2.5 x 0.45 metric coarse thread size is common in small mechanical assemblies, electronic enclosures, and light-duty structural connections. Sold as a single insert with a minimum order quantity of 10.

Key Features

• M2.5 x 0.45 metric coarse thread for compatibility with standard metric fasteners
• 304 stainless steel construction for corrosion resistance in demanding environments
• Tanged design supports installation with standard HELI-COIL insertion tools
• 3.8 mm (0.1496 inches) overall length with a 1-1/2D length-to-diameter ratio
• 5-3/4 free coils provide consistent thread form and load distribution
• Bright, uncoated finish - no post-install treatment required

Compatibility

Designed for use in M2.5 x 0.45 metric coarse threaded holes prepared with the appropriate HELI-COIL tap and installation tooling. Suitable for free running (non-locking) thread insert applications in standard metric assemblies.

Installation Notes

Installation requires a pre-drilled and tapped hole prepared with the correct HELI-COIL STI (Screw Thread Insert) tap for M2.5 x 0.45 metric coarse threads. Use the designated HELI-COIL insertion tool to drive the insert to the proper depth - the insert should sit flush with or slightly below the surface of the parent material. After installation, remove the tang using a tang break-off tool where required by the assembly specification. Always follow the manufacturer tooling instructions and applicable fastener standards for the assembly.