According to rule R7c:
Meaning a team could use Screws and Nuts made of Nylon 6/6 such as the ones available on Robosource. However, would this mean a Nylon standoff would also be legal as long as the lengths are identical? Or would standoff not be considered a form of nut? Here is an example of what I mean:
1in Nylon 6/6 Standoff