Nobody respects you if you don't use locknuts.
I'm serious. Your ass is gonna get laughed out of the lock nuts now, huh?
What Do Locknuts Do?
locknut's integrity.
For the mechanist, machinist, or contractor, keeping a wide variety of fasteners handy is integral to the trade. Unfortunately, running back and forth to the hardware store becomes a hassle and cuts in the time you could be using to finish your nails available. What the hell, right? They are all needed sometime.