- 11 Feb 2021
- Reaction score
- Sheffield, South Yorkshire
Effectively, during and after the war everything went to the BSF head size, effectively shrinking all the heads of BSW bolts by one size, (pre-war BSF 5/16 would have the same AF as BSW 1/4), so it should be easy enough to tell by comparison with a chart or bsf labeled spanner.Ta
I can ride past there on mi way home. I guess they are pre war. They are smaller AF but taller (fat). They are off this vice that I'd like to date as near as.
Paul in Sheffield