vintage thread question

Dead Rats

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Does anyone happen to know what thread size the centre bolt & nut on an early 1980s Sturmey-Archer sidepull brake is - deep drop chromed ones as found on roadsters, Bombers etc?

I'd like to replace the original nyloc nuts with new stainless one, but having tried and failed with 6mm, 1/4" BSW, 1/4" UNF and 1/4" BSC I'm stumped. I'm aware that Raleigh had their own proprietary thread sizes, is this another one? Or is it BSF?

FWIW, the same thread size is to be found on the cable barrel adjusters - I just can't ID it as I don't have a thread pitch gauge
 
Dead Rats":10uqc7rd said:
Does anyone happen to know what thread size the centre bolt & nut on an early 1980s Sturmey-Archer sidepull brake is - deep drop chromed ones as found on roadsters, Bombers etc?

I'd like to replace the original nyloc nuts with new stainless one, but having tried and failed with 6mm, 1/4" BSW, 1/4" UNF and 1/4" BSC I'm stumped. I'm aware that Raleigh had their own proprietary thread sizes, is this another one? Or is it BSF?

FWIW, the same thread size is to be found on the cable barrel adjusters - I just can't ID it as I don't have a thread pitch gauge

Have you spoken to Derek at The Old Bike Trader yet? He helped you with a dynohub didnt he?

Karl
 
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