Hex nuts and bolts are the most prevalent nut shape today, with six sides. Anchor shackles, bolts, screws, and other externally threaded components are all used with them. To avoid tension and movement, hex nuts are used in conjunction with these other fasteners to connect metal and wood components. Carbon steel, stainless steel, and nylon are all options. Plain or zinc clear coatings are available. Sizes are available in both inch and metric units. For applications that are subject to vibration, it works in conjunction with a variety of locking mechanisms.
https://www.bhallafasteners.com/tech-info/hex-head-bolt-with-nut-full-thread
