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Author Topic: Threads - 2BA or 5mm ?  (Read 2635 times)

Geoff Cropper

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Threads - 2BA or 5mm ?
« on: March 17, 2011, 09:38:45 PM »

Hi guys,          I have an old brass ww2 type propeller threaded either 2BA or 5mm.      How do I find what thread it is, as I'm told that 2BA and 5mm are almost identical ?         George Sitek doesn't do BA threads any more.    Does anyone still make BA threaded prop-shafts?          I'll visit the hardware shop tomorrow for a 5mm bolt.        Sorry, should have thought of that before, another senior moment eh.          Regards  Geoff.
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brianB6

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Re: Threads - 2BA or 5mm ?
« Reply #1 on: March 18, 2011, 06:31:31 AM »

If its very old it is almost certainly 2BA
You might have to buy a 2BA die to thread the shaft and don't forget some cutting oil!
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sarge257

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Re: Threads - 2BA or 5mm ?
« Reply #2 on: March 18, 2011, 04:47:51 PM »

Hi Geoff.  I recently got some 2Ba prop shafts made from the firm below.
Model Box
P.O. Box 3651
Bracknell
Berkshire
RG12 7UP
07786 485568
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Geoff Cropper

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Re: Threads - 2BA or 5mm ?
« Reply #3 on: March 18, 2011, 05:22:51 PM »

Thanks Sarge, I'll check it out soonest, cheers, Geoff.
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Tutssy

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Re: Threads - 2BA or 5mm ?
« Reply #4 on: March 18, 2011, 05:51:47 PM »

2BA or not 2BA? %%

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john s 2

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Re: Threads - 2BA or 5mm ?
« Reply #5 on: March 18, 2011, 08:31:42 PM »

That is the question.
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