Tripod thread foms, BSW or UNC or ?

Started Jan 21, 2006 | Discussions thread
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seanmckinney
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Tripod thread foms, BSW or UNC or ?
Jan 21, 2006

A fairly simple question but seemingly not one with a readily found answer.

I have seen that the common thread in the camera base is 1/4" 20TPI but those specs from memory fit BSW or UNC, british standard whitworth and unified national course.

Ditto the larger head mounting thread, I think I have seen it is 3/8" 16TPI which again mayches BSW or UNC

BSW and UNC are from memory not interchangable as BSW has a 55deg angle which UNC has a 60deg angle.

Thanks, sorry if I missed it in my trawl of "tripod thread" threads.

Ta

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