Always replace locking devices with ones of the same design.

Nuts and washers might at first appear to be symmetrical, but upon closer inspection, a difference in "sides" can be determined. The nut or washer will have a flat side called the hard edge, and a rounded side called the crown edge. When installing the fasteners, the hard edge should be toward the mounting surface, and the crown edge away from the mounting surface. This is also true when combining a washer and nut together. The washer hard edge is against the mounting surface, the nut hard edge is contacting the washer crown edge.

Always inspect reusable fasteners prior to reinstalling them in a vehicle. Discard and replace fasteners that show signs of damage or accelerated corrosion.

Always inspect locking tabs and washers. Do not reuse if damaged.

To prevent rotational damage to components, use two wrenches when loosening and tightening unions.

Discard and replace Nyloc and torque nuts after removal.

Discard and replace encapsulated and patch bolts after removal.

Approved locking agents must be applied to some threads on reassembly where indicated in the procedure.