Clevis pins and their fittings.

I have the usual two sizes of pins/fittings in the bits box (3/16" and 5mm) they are not really interchangeable (ok, 3/16" pins are 4.8mm dia. so usable in place of a 5mm if you're stuck). But I've just re-drilled a couple of old, imperial, HA vernier shroud adjusters so I can use 5mm pins, same as the rest of the boat, which has worked fine. But, I have a couple of 5mm quick pins that I thought I'd use on the lowers and they won't fit. So are 5mm pins exactly 5mm the holes drilled slightly larger 'clearance' size or are the holes 5mm and the pins slightly undersized? I'd have thought the former but my 5mm clevis pins fit fine through a 5mm hole it's just the fast pins that don't....

You own a 5.2mm drill bit?

5.2mm, think it's a pop rivet size, 4.8mm too, not sure though.

Originally posted by 423zero 5.2mm, think it's a pop rivet size, 4.8mm too, not sure though.

There are   I'm rediscovering my grammar school engineering background since I tidied out my workshop during lockdown