Heli-coil A1084-4CN080 Free Running Insert M4 X 0.7

Product Description

The HELI-COIL A1084-4CN080 is a free running wire thread insert designed to create strong, durable internal threads in tapped holes. Constructed from 304 stainless steel with a bright, uncoated finish, this tanged insert measures M4 x 0.7 metric coarse thread with an overall length of 0.315 inches (8.0 mm), corresponding to a 2D length-to-diameter ratio. It installs using a standard Heli-Coil installation tool and is suitable for applications requiring reliable thread repair or thread reinforcement in metals, plastics, and composite materials. Machinists, maintenance technicians, and assembly professionals are the typical installers.

This insert is used in light-gauge and standard metal components where stripped or weak threads need to be restored or where a stronger thread form is required in a softer base material. The M4 x 0.7 metric coarse specification makes it appropriate for small fastener applications in automotive, aerospace, industrial machinery, and general mechanical assembly. The stainless steel construction provides corrosion resistance, making it suitable for environments with moisture exposure or where material compatibility with stainless fasteners is required.

Key Features

• M4 x 0.7 metric coarse thread for standard metric fastener compatibility
• Overall insert length of 0.315 inches (8.0 mm) with a 2D length-to-diameter ratio
• 304 stainless steel construction for corrosion resistance and durability
• Tanged design for positive engagement during installation with standard installation tooling
• Bright, uncoated finish - no additional surface treatment to affect thread tolerances
• 8-5/8 free coils for consistent thread engagement along the insert length

Compatibility

Designed for use as a free running threaded insert in tapped holes requiring M4 x 0.7 metric coarse internal threads; compatible with standard Heli-Coil installation tools and tap sets for the M4 x 0.7 thread series.

Installation Notes

Installation requires a properly sized Heli-Coil tap to prepare the hole before insert placement. Use the appropriate Heli-Coil installation tool to drive the insert to the correct depth; do not use improvised tools that could distort the coil. After installation, the tang must be broken off using a tang break-off tool if it does not break during insertion. Always confirm the parent material is clean and free of debris before tapping and installing the insert.