All fasteners require a hex nut, lock washer and flat washer. To assemble the Model D3244, do these steps: 1. Turn the wagon bed upside down and attach the rear axle and axle braces with the M6-1 x 16 flat head screws. 2. Attach the steering assembly pieces with the M10-1.5 x 20 carriage bolt, then insert the cotter pin. 3. Secure the steering assembly to the underside of the wagon bed with the M6-1 x 16 flat head screws. 4. Install the wheels on the axles with the air valves and cotter pin