Heli-coil A1084-4CN100 Free Running Insert M4 X 0.7

Product Description

The HELI-COIL A1084-4CN100 is a free running wire thread insert designed to install and restore metric coarse internal threads in parent materials that are soft, worn, or thread-damaged. Manufactured from 304 stainless steel with a bright, uncoated finish, this insert measures M4 x 0.7 thread size with an overall length of 0.3937 inches (10 millimeters), yielding a 2-1/2D length-to-diameter ratio. The tanged design aids installation using a standard HELI-COIL installation tool. It is suited for production and repair applications across mechanical, industrial, and trade settings.

This insert is used in applications where an M4 x 0.7 metric coarse threaded hole requires repair or thread reinforcement. Typical scenarios include stripped fastener holes in aluminum housings, cast components, or thin-walled assemblies encountered in HVAC equipment, electrical enclosures, and mechanical systems. The 304 stainless steel construction provides corrosion resistance in environments where thread longevity is critical. Installation is performed by machinists, millwrights, and trade technicians during component repair or equipment reassembly.

Key Features

• M4 x 0.7 metric coarse thread size for standard metric fastener compatibility
• 10 millimeter overall insert length with a 2-1/2D length-to-diameter ratio
• 304 stainless steel construction for corrosion resistance and durability
• Tanged design for controlled installation with a standard drive tool
• Bright, uncoated finish - 11-1/8 free coils for consistent thread engagement

Compatibility

Designed as an OEM-style free running thread insert for M4 x 0.7 metric coarse threaded holes requiring installation or repair in metallic and composite parent materials.

Installation Notes

Installation requires the correct HELI-COIL tap to prepare the parent hole to the proper oversized diameter before the insert is driven in. Power down or de-energize any associated equipment before performing thread repair on live assemblies. After installation, the tang must be broken off using a tang break-off tool to complete the insert seating. Follow applicable manufacturer installation guidelines and workplace safety procedures throughout the repair process.