does anyone have the part number for this? i can't seem to find the bolt in any online catalog

i found this part number for the 370z rear bar, but am not sure its the same:
54459-0P03E

 

I don't know that the bolts are sold by themselves, may have to buy the bracket with the bolts. I'm not sure about that though. It would likely be much, much easier to just go to Lowe's or HD or an auto parts store and buy replacements. Cheaper too. Take one to compare and make sure you get the same thread pitch and approximate length.

 

well the reason i ask is that the bolts are not fully threaded, meaning the tip where it isn't threaded is stronger. they must of done this for a reason because it is more expensive to do...

normally it is easy enough to measure the thread and pitch and just order from mcmaster carr or amazon supply, but these bolts must be slighty different for a reason.