190mm front hub aluminium and cast iron brake drum

[BARRYRGS]

Does anybody know the size of the bearing retaining nuts I have two ready to insert along with new bearings etc but I need to run a tap down the threads first

Help

[mo goldie]

Hi barry

I cant help you with that one....but just wanted to say it`s Great you have a 190mm hub as I am Jealous as I would love to have one on my RGS Rep.......good luck with the finding out for the Tap needed someone out there Knows.

Cheers M

[ChrisG]

Hi Barry,
I don't know either except that most threads used at that time were BScycle. A nut of that size would probably have a 20TPI thread which is easily checked with a thread gauge.

[chaz]

normally 26tpi for cycle apart from some of the larger threads
https://britishfasteners.com/threads/bsc.html

[ChrisG]

Agreed but on the nut concerned could be 20TPI due to size.

[chaz]

as I said , apart from the larger threads, which were 20tpi and looking at the chart I posted up to 1" were 26 tpi with an option I know of 20tpi, presumably giving the options such as UNF/UNC or BSF /BSW in applications that need one

[JulianS]

Cycle thread from 7/16 inch came with both 20 tpi and 26 tpi.