Tapered Thread Insert Kit, M14-1.25, Use with a 9/16 in. Drill Bit, Designed to Be Use On Tapered or Gasket Seated Spark Plugs, 304 Stainless Steel, Set of 6|JEGS Tapered Thread Insert Kit [M14-1.25].
JEGS Thread Insert Kit [M10-1.50]
JEGS Thread Insert Kit [5/16 in.-18]
JEGS Thread Insert Kit [1/4 in.-20]
JEGS Thread Insert Kit [M8-1.25]
JEGS Thread Insert Kit [M6-1.0]
JEGS Thread Insert Kit [3/8 in.-16]