Morris Minor Owners Club

flywheel bolts just happen to be exactly right (high tensile correct shoulder depth & length) for bolting my newly aquired disc brake adaptor plates to the minor legs, but --- I have no nuts in my spares box that will go onto them, does anybody know what thread form they are, I'm guessing 3/8 bsf or unf.
Thanks in advance
Bern

Certainly UNF. Not absolutely sure abouut the 3/8" - but could well be right.