Screw thread
- Thread starter Monkeh
- Start date
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Nearest would be 7-32 ASME - dia is 3.835mm and 32 pitch but this is a very obscure thread.
If its of a bike then 5/32x 32tpi CEI (Cycle Engineers Institute.) thread is very likely, used gor mudgaurd eyes and bottle cages, its 3.97 dia
possibly a loosly cut 8-32 UNC which is also 32tpi and 4.16mm.
Its not far off 3BA but thats 34.8tpi so hardly far too coarse
If its of a bike then 5/32x 32tpi CEI (Cycle Engineers Institute.) thread is very likely, used gor mudgaurd eyes and bottle cages, its 3.97 dia
possibly a loosly cut 8-32 UNC which is also 32tpi and 4.16mm.
Its not far off 3BA but thats 34.8tpi so hardly far too coarse
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5/32 whitworth has 32tpi 
The application it is intended for, and the country of origin may give some clues.
Try http://www.watchman.dsl.pipex.com/thread.html
Try http://www.watchman.dsl.pipex.com/thread.html
It's for earthing the drop rod on a ceiling fan. I'm unsure where the unit was manufactured, but it is from a UK based company.
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