NGK C7HSA spark plug for various makes and models - Available in singles, packs of 4 or packs of 10. 

NGK traditional plugs are constructed for longer life and optimum performance. Corrugated ribs prevent flashover. NGK uses only the purest alumina silicate in its ceramic insulator which give all NGK plugs greater strength and better heat transfer. Copper cored and triple sealed to further aid in heat removal and prevent interior leakage.

• Buy in Singles, Packs of 4 or Packs of 10
• Thread Size: 10mm
• Reach: 12.7mm (1/2 inch)
• Hex Size: 16mm (5/8 inch)
• Gap: 0.7mm (.028 inch)
• Heat Range: 7
• Does not include terminal nut