These are theTraxxas TRA1747G Green Anodized4mm Flanged Nylon Locknuts. These will fit most 1/10 scaleTraxxas vehicles, or any vehicle that use a4mm axle. 4mm Flanged Locking Nuts. BGreen Anodized.
Hace been in the rc game for a while now and wheel nuts backing off and trashing the wheels has always been a issue. Ordered it and installed. All i can say is these are far superior to the stock replacement wheel nuts. You dont have to wrench on them to get a good solid hold and the serrations on the back really grip the wheel for excellent lock up. All around great product. Worth the couple extra bucks.