Heli-Coil R51310 Spark Plug Thread Repair Inserts 14mm x 1.25 6-Pack

The Heli-Coil R51310 replacement insert pack provides a reliable solution for repairing damaged spark plug threads in aluminum cylinder heads. These precision-engineered thread inserts restore stripped or worn 14mm x 1.25 spark plug holes to original factory specifications, ensuring proper torque retention and eliminating the risk of costly engine damage.

Key Features:

• Thread size: 14mm x 1.25 pitch (most common spark plug size)
• 3/4-inch reach length for proper depth installation
• Manufactured from high-quality stainless steel wire for corrosion resistance
• Creates stronger threads than the original tapped hole
• Distributes load evenly across all thread engagement points
• 6 inserts per package for multiple repairs or future use

Heli-Coil thread inserts are the industry-standard solution trusted by professional mechanics and automotive manufacturers worldwide. These inserts are designed to be permanent installations that withstand the high temperatures and vibrations of the combustion chamber environment. Compatible with the Heli-Coil 5546-14 master thread repair kit or can be used as replacement inserts for existing installations.