Bicycle hardware includes all the small fasteners used to assemble the various parts of the bicycle. This includes screws, bolts, nuts, washers and other similar parts. These parts are essential for keeping the bike in good working order and ensuring its safety. There are several different types and diameters of bolts and nuts, each adapted to a specific use on the bike, whether for fixing derailleurs, brakes, luggage racks, mudguards or other components. It's a good idea to choose the right fasteners and make sure they're properly tightened to avoid any mechanical problems.