Champion L77JC4 Nickel Spark Plug - 821

Conventional spark plug with nickel alloy electrodes. Copper core center electrode allows for increased conductivity and heat control.

Specifications:

• Shell:
  • Thread Diameter: 9/16" (14 mm)
  • Thread Pitch: 1/16" (1.25 mm)
  • Seat Type: Gasket
  • Reach: 1/2" (12.7 mm)
  • Hex Size: 13/16" (21 mm)
  • Terminal Type: Solid
  • Gap: 0.039" (1.0 mm)
• Center Electrode:
  • Material: Nickel
  • Type: Standard
  • Size: 3/32" (2.5 mm)
  • Projection: Non-Projected
• Ground Electrode:
  • Material: Nickel
  • Type: Cut Back
  • Quantity: 1
• General:
  • Resistor: No
  • Heat Range: 77
  • Torque: 26 - 30 lb. ft. (Cast Iron), 18 - 22 lb. ft. (Aluminum)