Yes, they have 8c washers, in fact they have all the parts shown, but they will not tighten up.
I suspect the seller substituted alloy 8c parts for the original Ti ones, and they aren't as thick, so the bolt bottoms out. But I'm not sure yet.
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1989 Schwinn Paramount OS
1980 Mclean/Silk Hope Sport Touring
1983 Bianchi pista
1976 Fuji Feather track
1979 raleigh track
"I've consulted my sources and I'm pretty sure your derailleur does not exist"