Heli-coil 1084-3CN030S Free Running Insert M3 X 0.5

Product Description

The HELI-COIL 1084-3CN030S is a free running wire thread insert designed to create strong, wear-resistant internal threads in parent materials that may be soft, damaged, or prone to thread stripping. Manufactured from 304 stainless steel, this tanged insert measures M3 x 0.5 thread size with an overall insert length of 3.0 mm (0.1181 inches) and a 1D length-to-diameter ratio. It is installed by machinists, maintenance technicians, and field service professionals working on precision assemblies, equipment repair, and thread restoration applications.

This insert is suited for metric coarse thread applications requiring a reliable, corrosion-resistant thread repair or thread reinforcement solution. With 3-3/4 free coils, it conforms to standard Heli-Coil installation tooling and is appropriate for use in aluminum, magnesium, cast iron, plastics, and other materials where thread strength must meet or exceed that of the parent material. It is commonly used in automotive, aerospace, industrial maintenance, and general manufacturing settings.

Key Features

• M3 x 0.5 metric coarse thread size for compatibility with standard metric fasteners
• 304 stainless steel construction provides corrosion resistance and durability
• Tanged design for reliable installation using standard Heli-Coil driver tools
• 3.0 mm overall length (1D ratio) suits shallow-boss and thin-wall applications
• 3-3/4 free coils ensure consistent thread engagement and load distribution

Compatibility

Designed as a standard Heli-Coil free running insert for M3 x 0.5 metric coarse thread applications, compatible with corresponding Heli-Coil installation tooling for tanged inserts.

Installation Notes

Installation requires drilling the parent material to the correct Heli-Coil tap drill size, tapping with the appropriate STI (Screw Thread Insert) tap, and driving the insert using a Heli-Coil installation tool. Power down or de-energize any equipment before performing thread repair on live assemblies. After installation, the tang must be broken off using a tang break-off tool; retain and dispose of broken tangs to prevent contamination of the assembly. Follow the fastener manufacturer specifications for torque values, as insert installation does not alter standard fastener torque requirements.