For reliability of bolted connection in terms of vibration under the nut usually enclose a split spring washer: its sharp edges prevent the loosening of fasteners.
If any washers at hand was not there, it can replace the ordinary, but old, rusty. Its rough surface will hold screwed in the nut from loosening.
Recommend to read
TANK “TYPE 98” ARMY OF CHINA
The Chinese tank "Type 98" is considered a model of armored vehicles of the third generation. The engineering of this started back in the 1970s, Then developed experimental tanks WZ-and...
ROCKETS “CIRCLE”
In the mid-1950s it became apparent gradual lag of the arms of the Soviet army air defense assets from the reached by that time, the capabilities of air attack. Continuous improvement of...
