FredC wrote on Mar 11^th, 2019 at 6:48pm:

Peter, In another thread you mentioned the French origin of Krag screws. BR in a very old post alluded to the same. What about the threads do you mean? The number size, the thread pitch or the thread form with the rounded crests and roots?

Based upon my research, the screws are metric, and of French design.  They are 4 mm. and .01 threads.   There is no advantage I can see (other than if one has an all-original, collectable rifle they want to keep that way) to keeping those troublesome threads on one's gun.