Genuine NGK 7159 G-Power Platinum Spark Plugs TR551GP

Shell
Thread Diameter: 14mm
Thread Pitch: 1.25mm
Seat Type: Tapered
Reach: 18mm (.709")
Hex Size: 5/8" (16mm)
Terminal Type: Solid
Overall Height: ISO
Gap: .059" (1.5mm)

Center Electrode
Material: Platinum
Type: Fine Wire
Size: 0.6mm
Projection: Projected

Ground Electrode
Material: Nickel
Type: Standard
Shape: Trapezoid

Specifications
Resistor: Yes
Resistor Value: 5k Ohm
Heat Range: 5
Features: 3.0mm Extended Metal Shell
Torque Specs: Cast Iron: 10.8-18 lb. ft. Aluminum: 7.2-14.5 lb. ft.