bolt size for roof and walls

[pothole]

What size are the bolts that hold the roof to the walls and windshield and the big bolts and washers that hold the walls to the tub?

[chazza]

1/4" BSF I think on my car, but 1/4 UNF would work just as well.

Measure the diameter in case I am wrong, with a rule, or vernier caliper - 6.35mm if you only have metric,

Cheers Charlie

[harry]

mine are 1/4 inch and the bolts are 1/4 unf, so a 7/16 inch spanner fits.