Complete list of fasteners for the Sintron Kossel
I found two lists for the Kossel mini (the documents you referenced are for a mini, so that is what I am assuming you got).  One as a Google Doc and one as an order sheet 

Both seem to list all the fasteners.

Here is a Sintron mini carriage assembly and it lists the hardware included

I found an ebay listing for the Sintron 2020 Rails.  The recommended screws are M3x20mm and here is the infor on the required t-nuts.

Happy building.