How are my nuts! and bolts for size?

[GPO_Van]

Have been trying to work out some nut sizes:-

The large nuts that hold on the “Bar mounting” front and rear (parts PAN104 and 107) what size should they be?
On my Traveller one is 7/8AF spanner size, others are 13/16AF but are all interchangeable on the threads!

I have 2BA spanner size on the hockey sticks and one larger at 3/8AF, same thread) I assume they should all be 2BA?

Thanks
Reg

[aupickup]

hockey sticks 2ba definately

[SUE482]

The bumper bar mountings are 1/2" BSF, front and rear.