Rigid b31 brake pedal spindle retaining nut

[chrisgoodwin]

Hi all,
I wonder if anyone can help out.
I am trying to source a stainless nut to fit the rear brake spindle, the outer nut that retains the foot pedal.
However, I cannot find the correct thread, I have twice ordered the wrong nuts and I now think I need a 9/16" x 20 TPI nut.
Can anyone confirm or correct me, if you pardon the pun, its driving me nuts!
Cheers
Chris

[ChrisG]

Hi Chris,
Sounds about right. BSA were using CycleThread at the time and 9/16 x20TPI is one such thread. This odd size is used on the Ariel swinging arm through shaft. Acme Stainless do them at £2.00 each. acmestainless.co.uk if you want to take a look.
Chris