What does the NGK stand for on a spark plug?

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asked Sep 23, 2018 in Other-Cars/Transportation by NodesVill (240 points)
What does the NGK stand for on a spark plug?

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answered Sep 23, 2018 by Shawn (105,070 points)
NGK on a spark plug stands for the type of insulator on the spark plug plus the company who makes the spark plug and insulator.

 The NGK stands for Nippon (Japan) Gaishi (insulator) Kaisha (company).

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