NGK standard plugs are constructed for longer life and optimum performance. Trivalent metal plating provides superior anti-corrosion and anti-seizing properties Corrugated ribs prevent flashover Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer Copper core aids in heat removal Triple seals prevent leakage Specifications Spark Plug, NGK Standard, 14 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 2015, Resistor, Each NGK Part Finder Tool Click here if you are uncertain which part you need for your application. This link is for the NGK Quick Part Finder: https://ngksparkplugs.com/en/part-finder Shell Thread Diameter: 14mm Thread Pitch: 1.25mm Seat Type: Gasket Reach: 19mm (3/4") Hex Size: 13/16" (21mm) Terminal Type: Removable Nut Overall Height: JIS Gap: .031" (0.8mm) Center Electrode Material: Nickel Type: Standard Size: 2.5mm Projection: Projected Ground Electrode Material: Nickel Type: Standard Quantity: 1 Specifications Resistor: Yes Resistor Value: 5k Ohm Heat Range: 2 Torque Specs: Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft. Part Information Brand: NGK/NTK Warranty: 1 Year Longevity: 30k Miles MPN: BPR2ES