{"product_id":"champion-spark-plug-502-d21-6pk","title":"Champion Spark Plug 502 \/ D21 6Pk","description":"\u003cp\u003eCopper-cored nickel center electrode with nickel ground, j-gap design for optimum ignitability. Lower voltage required than precious metal plugs. D21 Stock #502 Copper-Cored Nickel Center Electrode with nickel J-Gap Design Ground Electrode for optimum ignitability Lower voltage required than precious metal plugs Fits 30% Market, Case, John Deere, Massey Ferguson \u0026amp; International tractors Boxed Plug Specifications: Thread size: 18mm Reach: 12.7mm (1\/2) Hex size: 7\/8 (22.225mm) Gap: 0.025 (0.64mm) Seat type: Gasket Resistor: No Heat range: 21 Gasket #: A-678 Center Electrode: Type: Standard Material: Nickel Ground Electrode: Material: Nickel Type: Standard # of Electrodes: 1 Installation Information: Tightening torque - Cast iron: 32-38 lb. ft Tightening torque - Aluminum: 28-34 lb. ft.\u003c\/p\u003e","brand":"Champion","offers":[{"title":"Default Title","offer_id":47714435072052,"sku":"WBCARB0036OY47W","price":36.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/0441\/0420\/files\/717pmFoOZLL.jpg?v=1776859581","url":"https:\/\/digipbestlanet.com\/products\/champion-spark-plug-502-d21-6pk","provider":"Carkart","version":"1.0","type":"link"}