Folding Camping Chair Fix

I designed this as a fix for a camping chair which had lost some pieces and some were broken. There were these really strange looking washer things which were plastic so I knew I could print them. 

They were a little small when I first got them off the bed, but I was able to bend them a little. I'm sure not every camping chair is the same, so anyone who makes this may have to do this too. 

I'll put some pictures up soon if I can and a make as well.