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    Question about 2F intake manifold taper screw plug

    Yes that is interesting. I found what I think is an english copy of the JIS B 0203. In the table, thread pitch is described as "threads per 25.4mm". Consequently the thread pitch (distance between peaks) needs to be measured to four decimal places. 19 TPI = 19 threads per 25.4mm = pitch...
  2. 2mbb

    Question about 2F intake manifold taper screw plug

    Mcmaster-carr has some nice drawings for most of their hardware. Below is an example for 1/4" BSPT (british standard pipe taper) plug. Elsewhere I found a table showing that the thread pitch for 1/4" BSPT is 19TPI (see link). There is also a BSPP (British standard pipe parallel) which has...
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