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Old 16-06-2019, 07:31 PM
alval (Alan)
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alval is offline
 
Join Date: Jun 2017
Location: Northern Adelaide
Posts: 31
Hi Brian,
British imperial threads are 55 degree threads BSW and BSF etc. The other imperial ( fractional and tpi) threads used in america and elsewhere such as UNC and UNF are 60 degree threads the same as metric threads being 60 degrees.
Al
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