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Central nut facilitates the mounting high voltage wire and transfers the electric energy to the copper core central electrode.
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Ceramic insulator has a hardness similar to diamond assures a high mechanical strength, targe resistance for high temperatures and has the dielectric strength.
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Terminal pin transfers high voltage to the glass copper seal area.
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Termic assembly assures the dentisity of the spark plug during all operating conditions - local traffic or highways.
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Glass copper seal assures an ideal density of plug and rapid loss heat.
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Outer seal exists in spark plugs with outer flat seat and ensures the better tightness joint: plug - engine head.
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Inner sealing in shape of metal ring after squeezing in assembly process ensures tightness between the central core electrode set and the body.
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Central electrode with a copper core allows quick diffusion a heat. It makes the plug self ignition and there is no possibility fouling the plug by combustion products.
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Mass electrode with a visible groove in the shape of the letter "U" are made of special alloy Ni-Cr which ensures a high resistance to corrosion, electroerosion and thermal loads.
