To secure the various parts often used connection, using the so-called lock nuts. However, you can do without it. For this it is necessary to saw through the nut, as shown, and tightening it slightly to hit with a hammer.
Recommend to read
SCREW FROM THE NAIL
If it took a long screw thread M2—M6, and they are not (by the way, is not easy to find and sold out), it is easy to produce such a nail of suitable diameter, cut into the rod thread and...
“DESNA” WITH THE MOTOR
For his bike, I chose a folding bike "Desna-2" In model-849 with smaller wheels (20 X 1.75). To install it on the motor, did some fine-tuning. Fig. 1. Bicycle "Desna" with...
