408 - does anything use Whitworth nuts and bolts?
 

I had trouble finding a spanner to fit a small nut on the fresh air vent flap. It turned out an 11/32" SAE fitted but it got me wondering: will I need Whitworth spanners and sockets for any parts of this car?

David

Yes. Most things other than the engine and gearbox are BSF.

It’s mostly BSF rather than Whitworth (the fine rather than the coarse thread - and to add to the simplicity a Whitworth marked spanner fits a BSF bolt a size down).

Small fasteners are normally BA - I found a 2BA hex spanner very helpful with some old seized nuts. (And that will I think be the one you struggled with?).

This is helpful - The Classic Mechanic: MM, AF, BSW, BSF Spanner Conversion Chart

There are a lot of 1/4 BSF bolts that take a 3/16 Whitworth spanner - but this shows that a 7/16 AF would fit.

Thanks. I have ordered some.

David