Is it normal for the screws of brushless motors to have a slight difference in length?

When you fixed the gear and the brushless dc motor together, has the screw been slightly longer? Is this situation normal?

screws of brushless dc motor
When the factory produces, due to the deviation of the production mold. It is normal for the screw to have a slight difference in length. You only need to grind the screw a little shorter and you can use it normally.