[ARC5] Parts needed for ARC-5/274-N - splines...

[Brian Clarke]

1/2" 27 tpi is a 19th century British bicycle thread. As a locking
part for the Command Rx front tuning bush, you can also re-purpose
the back of a Belling-Lee male TV plug, readily available in most
English-speaking countries.
73 de Brian, VK2GCE. 
Brian Clarke
BE, MBA, PhD, CPEng, FIEAust
MD, Clarke & Associates P/L
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