Heli-coil R512 Threaded Insert M14 X 1.25 Ss 6 Pack

Product Description

The HELI-COIL R512 is a free-running, tanged wire thread insert designed to create durable, wear-resistant threads in soft or damaged parent materials. Manufactured from stainless steel, this insert accepts an M14 x 1.25 metric fine thread and installs to an overall length of 0.375 inches. It is used by machinists, maintenance technicians, and field service professionals to restore or strengthen threaded bores in aluminum, magnesium, and other low-hardness substrates. Each package contains 6 inserts. The tanged design allows for proper installation torque engagement and standard tang break-off after seating.

The R512 insert is suited for precision metric fine thread applications in automotive, industrial, and mechanical service environments. Metric fine threads are common in engine components, cylinder heads, transmission housings, and precision machinery where vibration resistance and close thread engagement are required. This insert is appropriate for both repair of stripped threads and new thread installation in soft-material assemblies. The stainless steel construction resists corrosion, making it serviceable in wet or chemically exposed environments.

Key Features

• M14 x 1.25 metric fine thread size for precision thread engagement
• Stainless steel construction provides corrosion resistance and long service life
• Tanged design for controlled installation using a standard HELI-COIL installation tool
• 0.375-inch overall insert length for consistent thread depth
• Packaged in a quantity of 6 inserts per package
• Restores or reinforces threads in aluminum, magnesium, and soft-metal parent materials

Compatibility

Designed as an OEM-style free-running thread insert for M14 x 1.25 metric fine threaded bores. Requires a compatible HELI-COIL STI tap and installation tool sized for M14 x 1.25 applications.

Installation Notes

Installation requires the correct STI tap to prepare the bore before insert placement. Use the matching HELI-COIL installation tool to wind the insert into the tapped hole until the top coil sits one-quarter to one-half turn below the surface. After seating, break off the drive tang using a tang break-off tool or punch. Always verify thread engagement depth and inspect the bore for debris before installing the insert.