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Old 26-02-24, 10:36
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Mike K Mike K is offline
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Quote:
Originally Posted by Chris Suslowicz View Post
# 1 was the original frame for the AFV mounted supply unit and set. This was plated steel (probably cadmium, so be careful of any powdery corrosion).

# 21 was the later (green painted) version, probably less of a hazard, otherwise identical.

All screw threads are Imperial (BSF), the strap tensioner is 5/16-in BSC (British Standard Cycle Thread), which I think is 26 tpi. Taps/dies are available from various model engineering suppliers in the UK. It may be best to make the knurled knuts out of stainless steel rather than painting or electroplating them.

Best regards,
Chris.
Yes BSC is 26 tpi but apparently there are some anomalies that can crop up.

https://britishfasteners.com/threads-bsc

I have also come across British Standard Electrical Conduit threads , mostly used on older electrical fittings.

https://www.casa.co.nz/electrics/Con...it-Threads.htm
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