These are the arms and plastic clips
Thanks for posting! The nylon piece you have is similar to the 39-538 Nylon Cam Lock Pair. This is used on the 39-537 Lock Assembly Pair. To determine the best option for your repair, carefully look over the dimensions below.
The small metal ring reminds me of the 21-161 5/16" E-Ring. Take a look and see what you think!