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MICROPHONE CLAMP ACCESSORIES
The 3/8 inch Whitworth thread
Despite the widespread adoption worldwide of metric thread sizes, and the consequent consignment of “imperial” threads to history (except in the USA!), the 3/8 inch BSW (“Whitworth”) thread continues as the worldwide standard (except in the USA) for microphone stands and clamps.
In general, BSF, BSW and even BA threads are now regarded as obsolete, except for maintenance. Consequently, but probably not…