[Hawk68]

Thanks Foldbak let me try to give more details. The bed box slide rolls out on the box frame which appears to be 2x3 frame. Each side of the box there are 2 white rollers (plastic rollers about 3 inches side by side) which support the bed box as it slides out. I would think those pins might hold the rollers in the roller frame which is screwed to the floor. However the bedroom slides goes in and out straight with no binding. I guess. Might have to take apart the frame floor so I can get to the rollers to see if those pins came from there.
Thanks for any ideas.