Door hinge brass bobbin thread size/pitch/type?

[AxemanS]

Anyone know what the thread should be within the brass bobbins glassed into the cill and scuttle to take the door hinge pivot bolts. The top bobbins look fine but lower ones have had incorrect bolts forced into them by the look of it - as the bobbins are still tightly fixed into the cill I don't really want to cut them out and replace so was going to try to re tap them - just need to know what taps are required. Any ideas?
It is possible the bobbins have already been replaced at some point as although the car is an '87 S1 the hinge pivot bolts have a 9.9mm shank rather than the 8mm I was expecting.

Thanks,
Dave

[AxemanS]

Thanks gents - yes it appears to be an M10. Just need to find some M10 bolts with short thread now (hate cutting threads shorter as they never seem to 'start' properly again afterwards

[AxemanS]

Looks like it will be a cut down thread length then😊

What was the length of those bolts Barry ( without head depth )and where did you get the new looking nylon tophat inserts from?

Thanks,
Dave ( currently trying to repair the knackered window regulators )