They come with the Mopar bed rails so there will be a Ram part #. I recommend using them as they are hexagonal and fit the holes in the bed sides. They won't spin when you are putting the bolts in.Are you talking about the bed accessory rails that slide? I am trying to get a few more too if you are
Pretty sure he is referring to a spring nut to fit in to the channel of the utility rail. Not the crush nuts that are used for mounting the rails.They come with the Mopar bed rails so there will be a Ram part #. I recommend using them as they are hexagonal and fit the holes in the bed sides. They won't spin when you are putting the bolts in.
Probably not cheap but one of the Mopar parts discount sites or maybe Ebay are options.
They are metric, 6mm IIRC.