See: Team Associated

Associated Electrics have added the new M4 low profile wheel nuts to their Factory Team range. The M4 wheel nuts are designed to fit on the front of 1/10th buggies such as the Team Associated B74 and B64, the TLR 22 and TLR 22-4, the Tekno RC EB410 as well as the Yokomo YZ-4 SF that require a thin nut to maintain the legal width limit at major events. With large-diameter locking serrations, these wheel nuts “bite” into the face of the wheel to create a secure hold.