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Multi-ground electrodes improve ignition capabilities and are less sensitive to increased voltage requirements due to gap growth. Designed to specific manufacturer ignition requirements, NGK's multi-ground plugs maintain all the features of their standard plugs, including:
  • Corrugated Ribs to Prevent Flashover
  • Pure alumina silicate ceramic insulator, providing superior strength and better heat transfer
  • Copper core to aid in heat removal
  • Triple seals to prevent leakage
  • Thread Diameter:  14mm
  • Thread Pitch:  1.25mm
  • Seat Type:  Gasket
  • Reach:  19mm (3/4")
  • Hex Size:  5/8" (16mm)
  • Terminal Type:  Solid
  • Overall Height:  ISO
  • Gap:  .024" (0.6mm)
  • Center Electrode
  • Material:  Nickel
  • Type:  Standard
  • Size:  2.5mm
  • Projection:  Projected
  • Ground Electrode
  • Material:  Nickel
  • Type:  Semi-Surface Discharge
  • Quantity:  2
  • Specifications
  • Resistor:  Yes
  • Resistor Value:  5k Ohm
  • Heat Range:  6
  • Features:  Intermittent Gap
  • Torque Specs:  Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft.