OEMTOOLS 25648 Fix-A-Thread Spark Plug Saver Inserts, Metric, M14 - 1.25, Socket Rethreading Kit Components For Car, Truck, RV, And Aviation Repair, 14mm Thread

OEM Tapered Spark Plug Thread Repair Inserts are designed for rethreading in all materials such as alloys, steel, plastics, magnesium, etc. Specified for military, aviation and other similar usage. Inserts are made from high quality 18-8 stainless steel wire with a diamond shaped cross section wound to the shape of a spring thread.