Rotary 2324 Steel Insert M14 X 1.25mmx3/8" by Rotary $5.46 Sold out 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Sold out PRODUCT INFORMATION Type Other PRODUCT DESCRIPTION DESCRIPTION Thread Repair Kit for Spark Plugs. Steel Insert 28148. SPECS DIAMETER 3/8" THREAD SIZE M14 X 1.25mm X 3/8