Nylon Locknuts work well, but sometimes they are not available, and after several times on and off a bolt they lose much of their locknut properties as the nylon shapes to the threads of the bolt. Twice in my work traveling, I have needed locknuts and been unable to find them.
1. “Cut and Crush”—distort the threads on a nut by cutting out a narrow section of threads and crushing the remaining threads into that gap.
2. Ovalized nut –distort threads into an oval
3. Reminders They nylock. and other commercially available locking nuts, 2 nuts tightened against each other, Loctite, etc.
**The “cut and crush” and “ovalize” methods were taught to me by Ralf Hotchkiss, my colleague at Whirlwind Wheelchair. Ralf travels and works extensively in places with limited access to modern manufacturing technology and supply chain, and has been learning and designing tricks for “low tech” manufacture for the past 40 years.
These methods can be replicated pretty much anywhere—but I made these locknuts at Techshop SF (amid the whir of CNC machine tools).
where i made it: http://techshop.ws/
where i learned how to make it: http://www.whirlwindwheelchair.org/