Marcus ,
I measured a drum with a caliper and got approx. 22.5mm between centre of wheel stud hole to centre of countersunk fixing hole .
Note this is not a accurate measurement .
In my experience 400 - 405 are all the same hole/stud pattern .
I've fitted 403 & 405 drums to 400 & 401 hubs
And 400 drums to 403 hubs
Front and rear are all the same.
What do you need this measurement for ????
Regards
Geoff
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