So many questions !!
trying to identify thread on rear brake spindle 1942 WM20.
Looks like 7/16 something ? (that's the smaller of the 2 threads)
TIA
Baz

email (option): binnawan@iinet.net.au

The rear brake cam has 7/16" x 20 Cycle for the nut and 1/4" BSF for the grease nipple - is that you are looking for?

email (option): rays54@hotmail.com

My first thought was brake pivot, but two threads? Brake lever pivot? If so 7/16" and 9/16" both 20 tpi.

email (option): pes.sales@btconnect.com

Thanks Mark and Ray. Brake lever pivot. Of course, my BSC kit does not have 7/16", Murphy is alive and well.
I have 7/16 BSC nuts, just have to take it easy and work one of them on.
Baz

email (option): binnawan@iinet.net.au

The 7/16" 20 tpi Nut I have is 19.55mm across flats and 9.8mm thick, very corroded. I'm guessing there is a slim nut on the other side, but I don't have one. So no dimensions.

email (option): pes.sales@btconnect.com

email (option): ronpier@talk21.com

It's worth fitting this part to the frame early in the restoration as it gets progressively harder to access the inner nut as the other parts go on...Mark, I can provide you with the dimensions for that nut...I'll find one tomorrow...Ian

email (option): ian@wright52.plus.com

The thin nut on the back is 15-1455 0.782" hex 0.218" thick 9/16 CEI
The front one could be 15-0541 0.782" hex 0.281" thick 7/16 CEI
I guess there should be two used of these?

email (option): pes.sales@btconnect.com

I think it's the other way round Mark. 15-1455 is the front nut (#20 in the illustration,1 off). 15-541 is the rear nut. No dimensions given in this list though. Ron

email (option): ronpier@talk21.com

If it stops snowing here I can check those nuts here later today
😱😱
Jo’b

email (option): jonnyob1@googlemail.com

email (option): leonhop3_at_planet_dot_nl