This is the Replacement Engine Nut for the Duratrax Maximum ST and BX.
The engine nut is constructed of plain black metal.
Both ends are thread; one end will screw onto the crankshaft.
11mm & 4mm e-clip grooves.
Plain silver metal, 11mm e-clip
Plain black metal button head screw with a hexagon socket drive
This goes on the crankshaft after the flywheel and "inside" the