| According to the FSM a grade 0 rod bearing ranges from 1.496-1.499mm and a Grade 1 ranges from 1.499 to 1.502mm. A maximum difference of 0.006mm. I know from experience these numbers are not all that accurate but it highlights the minute difference between the grades. I would not worry about the boxes, I think the shells get thrown in at random just to pack them in for shipping. Personally, I would concern myself with the color coding on the edge of the bearings. I'm going to check into the part number stamping on the bearings, like I said before I feel like I remember running into that.
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