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Thread size for a Model A spark plug
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05-30-2021, 09:24 AM
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katy
Senior Member
Join Date: Jun 2015
Location: Red Deer, Alberta
Posts: 5,082
Re: Thread size for a Model A spark plug
Quote:
Originally Posted by
Bob C
7/8-14 is NF, 7/8"-18 is NS
Oops, you're correct, my mistake.
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