NGK 7839 DR7EA Nickel Spark Plug NGK standard plugs are constructed for longer life and optimum performance. Trivalent metal plating provides superior anti-corrosion and anti-seizing propertiesCorrugated ribs prevent flashover Pure alumina silicate ceramic insulator, provides superior strength and better heat transferCopper core aids in heat removal Triple seals prevent leakage Product Specifications Shell Thread Diameter12mm Thread Pitch1.25mm Seat Type Gasket Reach19mm (3/4") Hex Size18mm Terminal Type Removable Nut Overall Height ISO Gap.028" (0.7mm) Center Electrode Material Nickel Type Standard Size2.5mm Projection on-Projected Ground Electrode Material Nickel Type Standard Quantity1 Specifications Resistor Yes Resistor Value5k Ohm Heat Range7 Torque Specs: Cast Iron: 10.8-18 lb. ft. Aluminum: 10.8-14.5 lb. ft.
