I replaced 5,6,7 because I like having new hardware with my clips so it was the pair of slider clips and the black plastic clips (#7) and 2 bolts and 2 nut/bushings (#6 and #7) - #3 is fine you can leave it

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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards