Quote:
Originally Posted by burnsauto
ok....question.
why did nissan/greddy/ etc decide to use BNPT thread pitch? Is that a standard thing to use in japan?
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It's British Standard Pipe Thread versus National Pipe Thread. I think it's just a metric thing or something else. I don't know why, but they did. I'm not sure if other Japanese Manufacturers used it as well, but I would assume that they did.