The rear cross sill is located below the tailgate. It ties the back of the bed together by being bolted crosswise from one bed side to the other. The Ford rear sill has "brackets" riveted in place and holes for mounting strips and wood. The bed-to-frame bolt passes through the brackets as it bolts the rear sill to the frame. The strips and wood sit on the rear sill, leaving the ends of the wood exposed. The bed wood sill is used to "cap" and protect the ends of the wood and is sold separately. bolt holes.
Made in the USA.