Not able to get crank bolt into bottom bracket spindle I recently posted a question about changing my chainset, I was advised on this  SRAM chainset which I could use which would fit my square tapered bottom bracket. 

I have attempted to fit the new chainset and managed to get the crank with the chainrings on onto the bottom bracket spindle. However, I am struggling to get the other crank onto the bike because I cannot seem to screw the other bolt that came with the chainset into the bottom bracket with or without the crank. It screws around but does not screw in. This is preventing me from getting the other crank onto the bike. I am not sure if I am doing something wrong, could buying grease for the bolt help attach it or should I contact the seller and try asking for a new bolt?

Here are some photos of the bottom bracket, the problem bolt, and the crank which I added to the bike:
The picture of the left side of your bottom bracket without the bolt is not real clear, but I wonder if there's a round obstruction partially blocking the opening and preventing the threads of bolt and BB from engaging. Normally there is a mm or 2 of unthreaded counter-sink at the beginning of the spindle's hole prior to the threads beginning.  While it could be a photographic anomoly, I could see some of that counter-sink--or some threads themselves--galling and upon removal of the original bolt, get spun up at the opening, creating a partial blockage. That would cause the symptom you describe.

At any rate, here's example of a replacement bottom bracket (not a recommendation).   You'll need to select the correct length of spindle, but as you see, they're relatively inexpensive and replacement is appropriate regardless of the reason the bolt won't engage.