NGK standard plugs are well-manufactured for longer life and optimum performance. The triple-Gasket sealing process helps to prevent leakage. This product is the plug of choice in millions of vehicles. Key Features: The Trivalent metal plating provides anti-seizing properties and superior anti-corrosion The corrugated ribs stop flashover, and the copper core helps in heat removal It features a pure alumina silicate ceramic insulator that provides superior strength and better heat transfer This product meets the OEM Quality. Consistent Performance Specifications: SKU: 86-4179 UPC: 087295041796 Weight: 0.15 LBS Condition: New Shell Thread Diameter: 12mm Thread Pitch: 1.25mm Seat Type: Gasket Reach: 19mm (3/4") Hex Size: 5/8" (16mm) Terminal Type: Solid Overall Height: JIS Gap: .028" (0.7mm) 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: 8 Torque Specs: Cast Iron: 10.8-18 lb. ft. Aluminum: 10.8-14.5 lb. ft.