The box came with no hardware. The company must be called directly. I had to call three times, took over 25 minutes each time to get a person. One part came in, another part is supposedly on it's way, one part is on back order. None of this was explained the first time I called. It sounds like the issue is more with Keter, I realize., which it is.  However, the product was purchased from Wayfair and they have no responsibility for this, so I was told. They are not standing by what they sell. I didn't appreciate that either. 
I also purchased a Suncast box which is just better made all around - sturdier, etc.