NGK Spark Plug CMR7H

Technical Specifications
Thread Diameter: 10mm
Thread Pitch: 1.0mm
Thread Reach: 12.7mm (1/2")
Hex Size: 16mm (5/8")
Spark Gap: 0.7mm (.028")
Heat Range: 7
Resistor Value: 10k Ohm
Terminal Type: Solid
Tightening Torque: 7.2–8.7 lb. ft. for aluminum heads; 7.2–10.8 lb. ft. for cast iron.