5/32” inches is 0.156” which is 3.968 mm. So if the Asian manufacturer considers 4 mm easier and close enough the pin will be oversize. WW II drawings give the pin diameter as max/min 0.158/0.154 . 5/32 is right in the middle of this range. I don’t have the MILSPEC documentation but guess this is likely the dimension. Whether that is enough to create problems, I don’t know.
But I also saw a drawing where the pin diameter was specified as large as 4.01 mm. Buying only from manufacturers with a known track record of QA and following MIL Specs seems to be wise. David K0LUM > On Jul 12, 2021, at 10:09 AM, <[email protected]> <[email protected]> wrote: > > A PL-259 should have a 5/32" (4mm) pin. > > John KK9A > > > kd4iz wrote: > > What had apparently happened was that I had a batch of the offshore made > "Amazon Special" PL-259s that appear to have a slightly oversize center pin. > The patch cable used until recently had one of them on one end. It had > spread the leaves on the ANT1 SO259 just enough that a good connector, when > perfectly centered and seated, did not make contact! Gentle recentering of > the leaves with a miniature flat blade screw drive yielded relief and a > self-administered head smack. > Jack Spitznagel - KD4IZ > Science River LLC > Biomedical Consulting Services > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
