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Threads ME vs BSW
| clivel | 28/07/2015 22:19:58 |
| 344 forum posts 17 photos | I recently ordered some ME taps and dies. The 5/32" x 32 I received was marked BSW rather than ME. As I have always had excellent service from this particular supplier, I assume that 5/32" x 32 ME and BSW are identical. Is that correct? If so, in general, are all ME and BSW threads of the same pitch and diameter equivalent? Thanks,
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| Michael Gilligan | 28/07/2015 22:31:40 |
 23121 forum posts 1360 photos | Clive, The ME series of threads are either 32tpi or 40tpi, for all sizes. 5/32" 32tpi is a valid ME thread, but ... Useful table here MichaelG |
| duncan webster | 28/07/2015 22:37:13 |
| 5307 forum posts 83 photos | 5/32 BSW and 5/32*32 ME are identical, as are 1/8 BSW and 1/8 * 40ME |
| clivel | 28/07/2015 23:33:16 |
| 344 forum posts 17 photos | Duncan, thanks for the speedy response, and MichaelG thanks for the link to those very useful tables. Clive |
| Roderick Jenkins | 28/07/2015 23:41:37 |
 2376 forum posts 800 photos | And the reason that they are identical is that BSW, BSF, ME (and the 26 tpi constant pitch series) are all 55 degree thread form rather than the 60 degrees of the metric, US and unified series. Rod |
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