Big nuts are used in a variety of industrial applications. They anchor light posts and traffic stop lights to the ground, hold up ski lifts (what would we do without those?), keep roller coasters from flying apart, provide stability for skyscrapers, and the list is near endless. If you don't own any yet, a wide variety of big nuts can be purchased from online shops, such as Amazon. A few common nut terms I found in the industrial nut glossary include: thickness, hardness, major diameter, nominal size, shape, and tolerance.