Faucet
A simple bump with your hand will straighten out the faucet spout. The hot and cold barrels can be rotated to even out the handles. Once they were tightened, which happens before the handles are installed, the orientation of the handles depends on how the faucet's handle splines work out. The handle can only be indexed according to them, which is why I prefer to install them at a forward angle rather than exactly 180 degrees from each other, (which is much more apparent than a difference in degrees when they are at an angle. If the faucet has washers, then it doesn't make a lot of difference because they will continually change position as the washer seats itself and then starts to wear.