Heli-coil A4184-5CN075 Screw-locking Insert M5 X 0.80

Product Description

The HELI-COIL A4184-5CN075 is a tangless screw-locking helical wire insert designed to provide a secure, vibration-resistant threaded connection in metal and composite assemblies. Manufactured from Grade 304 stainless steel with a bright finish, it delivers reliable corrosion resistance in demanding environments. The insert accepts an M5 x 0.80 metric coarse thread and measures 7.5 mm in overall length, representing a 1-1/2D length-to-diameter ratio. The tangless design eliminates the need for tang break-off after installation, reducing debris risk inside assemblies. Licensed HVAC technicians, machinists, and maintenance professionals install this insert when repairing stripped threads or building new assemblies requiring a hardened thread form.

This insert is suited for thread repair and new-build applications in light industrial, HVAC equipment, and general mechanical assemblies where an M5 x 0.80 metric coarse thread is required. The 1-1/2D length provides a balanced grip-to-depth ratio appropriate for medium-load fastening applications. Its stainless steel construction makes it a practical choice for environments with exposure to moisture, mild chemicals, or temperature cycling. The tangless configuration is preferred in precision assemblies where retaining a broken tang inside a bore is not acceptable.

Key Features

• Grade 304 stainless steel construction for corrosion resistance
• Tangless design eliminates tang break-off debris after installation
• M5 x 0.80 metric coarse thread form, 1-1/2D length ratio
• 7.5 mm overall insert length with minimum outside diameter of 6.25 mm and maximum outside diameter of 6.80 mm
• Maximum locking torque of 1.60 N/m with minimum breakaway torque of 0.3 N/m
• Bright finish; 6-7/8 free coils for consistent locking engagement

Compatibility

Designed as an OEM-style thread repair and new-build insert for assemblies requiring an M5 x 0.80 metric coarse internal thread with a 1-1/2D insert length.

Installation Notes

Installation requires a proper HELI-COIL or compatible tangless insert installation tool and a correctly sized tap to prepare the parent material bore before driving the insert. Power down and de-energize any equipment before performing thread repair on electrical or mechanical assemblies. Follow the insert manufacturer's tap drill size and tap specifications to ensure proper thread engagement and locking performance. Tangless inserts do not require a tang-removal step, but the bore should be inspected for chips and debris before final assembly.