Spare tire hardware kit.
This bolt kit install at the rear of many Coleman and Fleetwood pop ups. They extrude from the rear body panel, and are installed into a spare tire mounting plate, or the upper crank assembly mount plate.
Commonly found on Pioneer and Plantation series trailers.
Installation instructions can be found here
Bolts measure 7 inches long.
Sub part number 4741A5791 and 4747A5891
Part number 4741B5791