Champion Spark Plug CHAMPION SPARK PLUG - 861

Conventional spark plug with nickel alloy electrodesCopper core center electrode allows for increased conductivity and heat controlThread size: 14mmHex size: 13/16" (20.6mm)Reach: 9.5mm (3/8")Seat type: gasketHeat range: 19Resistor: noCenter electrode -  Type: standard;  Material: nickel;  Projection: non-projectedGround electrode - Type: J-gap; Material: nickel