sill plates

Known as "thresholds" or "sill plates", the "scuff plates" as Ford called them hold the carpet or rubber mat to the floor.  The part numbers for the front ones are E0TZ 1013208-B for the natural aluminum finish, or E0TZ 1013208-C and E0TZ 1013209-C for the black ones.  And the crew cab plates are E3TZ 3513228-A.  (Note: The aluminum front ones and the rear ones are the same for both sides, but apparently the black ones are different from left to right.)