NGK's Gold Palladium Plugs Feature a Fine Wire Gold Palladium Center Electrode for Improved Ignitability, Increased Durability and Enhanced Anti-Fouling Capabilities. 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. Copper Core Aids in Heat Removal. Triple Seals Prevent Leakage. Plug Specifications: Thread Size: 14mm. Hex Size: 20.6mm. Reach: 19mm. Seat Type: Gasket. Gap: 0.66mm. Terminal Type: Removable Nut. Resistor: No. Thread Pitch: 1.25mm.

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