AR bolt question

[Tigerstripe]

i just happened to see a 5.45x39 bolt for sale.

would it work for 762x39 also?

i hear the differences in bolts is the depth seating of the case bottom.

are 545x39 and 762x39 case rims the same size?

 

[bigfutz]

Looks like they have quite a bit of difference in base/rim dimensions - 10 vs 11.35 mm.