Helicoil Thread insert M14 x 3 4 in Spark Plug Pack of 10 95 9000 A 118deg point reduces the MH90 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) HMBH03 Body Working Hammer Hammer with forged alloy steel heads and mirror polished face 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 the repaired thread will be stronger than the original