Bolt and nut

thingiverse

Humans employ bolts to secure parts together with a nut that threads into it for a tight seal. The nut is screwed onto the bolt and secured using a wrench or other tool, holding parts in place against various types of force and stress. Different applications require distinct fasteners that suit unique circumstances. For instance, large equipment often uses big bolts, while small machines may need tiny nuts. This flexibility ensures versatility when working with diverse human-made creations.