Roberts Patent of the Day

[bpetersxx]

I hope I did not stumble into the secret location of the Patent of the Day.

Correct me if I am wrong but is this Robert`s LK 57 washer

http://patimg2.uspto.gov/.piw?docid...6d=pall%26s1=(D32/6.CIOR.%2Bor%2BD32/6.CIXR.%