Originally Posted by
TejanoTrackie
Not nuts and separate lock washers, but nuts with built in floating washers that permit you to tighten the nut without grinding it against the dropout. From Harris Cyclery:
Nuts
Track Nuts $3.95/each

Track Nuts Standard
Serrated Flange Nuts Proper track nuts have integral washers. They permit easier adjustment of chain tension, and hold the wheel in place better.
Those are what are on there now. the 3rd one to the left.