I've got a steel 5 gal. bucket full of mixed hardware under my workbench that started in 1978. Before last April, I could drag it out, turn it on its side, spread the contents in the floor and scratch through it. I can't move that bucket today. I can ask junior to scratch through it. Maybe he'll get lucky. 1978 to 88 was in a textile mill so odds of finding any similar kep washer hardware in it are mighty slim.