Description PRODUCT DETAIL:NGK Standard spark plugs are proven technology that offer reliable performance NGK Standard plugs are an OE cornerstone that have provided decades of reliable performance Solid Copper Core offers superior heat dissipation, conductivity and broad heat range Small engine spark plug gap (in): 0.028 Hex size (in): 3/4 in. Thread size (mm): 14 mm Heat range: 6 Lawn mower spark plug is engineered specifically for OE applications NGK Standard plugs are treated with corrosion-resistant plating to ensure ease of installation and removal Actual OE or equivalent replacement spark plug Removable terminal nut 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 Triple seals prevent leakage Thread pitch: 1.25 mm Seat type: gasket Reach: 9.5mm (3/8 in.) NGK spark plugs are made of nickel Size: 2.5 mm Projection: projected Resistor value: 10k Ohm Torque: Cast iron: 18-25.3 lb. ft.; Aluminum: 18-21.6 lb. ft. 1 year limited warranty