NGK 2120 Spark Plug D8EA

Shell
Thread Diameter: 12mm
Thread Pitch: 1.25mm
Seat Type: Gasket
Reach: 19mm (3/4")
Hex Size: 18mm
Terminal Type: Threaded Stud
Overall Height: ISO
Gap: .028" (0.7mm)

Center Electrode
Material:Nickel
Type: Standard
Size: 2.5mm
Projection: Non-Projected

Ground Electrode
Material: Nickel
Type: Standard

Specifications
Resistor: No
Resistor Value: 1K Ohm
Heat Range: 8
Torque Specs: Cast Iron: 10.8-18 lb. ft. Aluminum: 10.8-14.5 lb. ft.