Traxxas 1747R Nuts, aluminum, flanged, serrated (4mm) (blue-anodized) (4)

These are the 4mm flanged Nylon locknuts from Traxxas.
Features:
Aluminum construction anodized blue in color
Serrated on the back for sure grip
Includes: Four 4mm Flanged Nylon Locknuts
Requires: 6mm nut driver