Engineering is my Passion - A nut is a type of fastener with a threaded hole. Nuts are almost always used opposite a mating bolt to fasten a stack of parts together.
China Factory Hexagon Nut/Nylon Insert Lock Nut/Coupling Nut/Hex Nut/Flange Nut/Wing Nut/Cage Nut/Tee Nut/Spring Nut/Castel Nut/ Welding Nut/Square Cap Long Nut - China Hex Nut and Hexagon Nut
Everbilt 1/4 in.-20 Stainless Steel Nylon Lock Nut (3-Pack) 800131 - The Home Depot