B25SS CLUTCH SPRING NUT 57-2748

[CLIVEDACKUS]

Hi all

i have just bought two sets of clutch spring nuts for my B25 - one set from TMS which do not fit and another from Feked which also do not fit. Both sets have a smaller head than those on the bike and neither have lock wire holes.

Does anyone know the thread size for these nuts please?

Cheers

Clive