connecting rod shells

[johnkarl]

I have just removed the shells from the crankshaft to pistons [big end shells] ,to find that no 6 shell seems to have been turning inside the connecting rod and end cap , is this a common problem, or am i just lucky , or unlucky as the case maybe .Secondly the number on five of the shells is 0A57C .The number 6 shell numbers have been worn off but i surmise that this will be the same as the rest, is this a standard bearing size if so i shall order some new ones