Size - 5/16 x 18 UNC. Threads per Inch (TPI) - 18;Complete thread repair kit - Including the required drill;V-Coil tap and drill manufactured from High Speed Steel;V-Coil wire thread inserts manufactured from aerospace specification stainless steel;Due to the narrow and exact tolerances, the newly repaired thread is usually stronger than the original thread

• V-Coil 5/16-inch UNC Thread Repair Kit

V-Coil 5/16-inch UNC Thread Repair KitV-Coil