Unless you are a mechanical engineer, you might not realize there’s a lot of nuances to something even as simple as a nut and bolt. How many threads do you need to engage? Do lock washers work?

He uses a vise, but we’d imagine that an arbor press is more commonly used. Lock washers and nuts seem like a simple topic, but it is way more complex than you probably thought. Way more complex.

Using the bolts so the nuts face up into the inside of your container, bolt the casters on, placing the locking washer on the nut side of the bolt. Tighten the nuts using your box wrenches or ...

Toothed nuts or nuts that have built-in toothed washers that engage and lock against the bearing surface. Some nuts may also cause a wedging action against the bolt threads. Special-thread nuts ...

And the second problem is that, like I just mentioned, all the parts that are in this assembly, which is the brace, the bolts, the lock nuts, the washers, must be maintained. And obviously ...