Spark Plug Champion J99 - Crown

The Champion J99 Spark Plug (part number 599) is an industrial-grade spark plug designed for heavy-duty performance in high-compression and high-load environments. Here are the key specifications:

• Plug Type: J99
• Part Number: 599
• Thread Size: 14mm
• Thread Reach: Typically around 0.375 inch
• Hex Size: 13/16 inch (0.813 inch)
• Seat Type: Flat with crush washer included
• Center Electrode Tip Material: Nickel
• Ground Electrode Core Material: Nickel
• Resistor Type: No
• Applications: Industrial and agricultural engines
• Features:
  • Compatible with alternative fuels (e.g., gases)
  • Supports CO₂ reduction
  • Designed for high-temperature and aggressive service environments
  • Built for long-lasting durability