NGK Spark Plug;13/16" Hex Sz;0.551" Thread

Spark Plug; Application Automotive; Commercial and Industrial; Lawn and Garden; Marine; Powersports; Hex Size 13/16 in; Thread Size 0.551 in; Thread Reach 0.5 in; Ground Electrode Quantity 1; Ground Electrode Tip Design Standard; Gap Size 0.028 in; Resistor Plug Yes; Hex Size - Metric 20.64 mm; Thread Reach - Metric 12.7 mm; Insulator Material Ceramic; Manufacturer Heat Range 7; Seat Type Flat; Center Electrode Diameter 0.098 in; Ground Electrode Material Nickel Core