What generation is your truck?
I am running a rolling tonneau thst uses the factory rails on my 2018.
Using these
OwnMy Pack of 10 Cargo Tie Down... https://www.amazon.com/dp/B07WQSYWN2?ref=ppx_pop_mob_ap_share
MELIPRON 10pcs T-Slot Nuts Fit... https://www.amazon.com/dp/B09Z8Q42D2?ref=ppx_pop_mob_ap_share
M6 x 16mm Flanged Hex Head Bolts... https://www.amazon.com/dp/B08CZ6T4QK?ref=ppx_pop_mob_ap_share