Metric Deco Locking Wing Nuts:

Drawing 1: dcowngdw.jpg

All tolerances +/- .26mm 
Dimensions are in millimeters
Item Number Description A B C D
06M030050DLWN M3 X 0.5 16 9.5 8 6
06M040070DLWN M4 X 0.7 16 9.5 8 6
06M050080DLWN M5 X 0.8 22.2 12.7 11.1 7.9
06M060100DLWN M6 X 1.0 29.7 15.8 13.4 9.5