Do these assemblies come with the axle nut and lock washer?

These are hub and bearing assemblies only. You'll need to source the axle hardware separately—check your vehicle's service manual for the correct nut size and torque spec, or grab them from your local Modsupply inventory.

Can I install these myself with basic hand tools?

Yes. You'll need a socket set, jack and jack stands, and a brake caliper removal tool. The assembly bolts directly to the factory spindle—no special press or bearing tools required. Brake removal is the longest part of the job.

Do I need to replace the brake rotor at the same time?

Not necessarily—rotor condition is separate. If your rotors are within spec and run true, keep them. If they're scored or worn, replacing them now avoids a second brake job later. That call is yours based on inspection.