Handy 10 packs of M3 metric Nylon Locking Nuts. 
 
This are the perfect answer for all those desing ideas that keep shaking themselves apart. Make that a thing of the past with these handy little M3 nylon locking nuts .
 
Please note 
 
 
These nuts are reusable although they do have a lifespan and with repeated tightening and un-tightening they will gradually lose their locking effectiveness 
 
 
You will require a 5.5 nut driver to fit these nuts.