M10 X 1.00 X 15.0mm Time-Sert Spark Plug Inserts 40103 Qty 10
M10x1.0 Washer Seat Insert .600/15.0 Part #40103 WASHER SEAT SPARK PLUG INSERTS copper plated M10x1.0 This listing is for (1) ONE insert Please note: The size of the insert refers to the inside diameter and thread pitch.