Helicoil Thread insert M14 x 3 4 in Spark Plug Pack of 10 95 9000 A 118deg point reduces the FIR861 A 118deg point reduces the risk of the bit slipping while a high temperature treatment during the manufacturing process make it perfect when applied to steels that are tensile or have a large alloy content (like auto or aircraft bodies) Maximum torque: 380 Nm HELE M1424SP 10 Helicoil Thread Insert M14 x 3 4 in Spark Plug Pack of 10 Free Running Inserts Helicoil Inserts are made from high grade 18 8 helically wound stainless steel wire Once installed the radial pressure of the insert holds it firmly in place Due to the exact tolerances Free Running Inserts Helicoil Inserts are made from high grade SS304 (18 8) helically wound stainless steel wire Specifically for Spark Plug Repair