Grade: 4.8, 8.8, 10.9, 12.9, Material: Q235, 35K, 45K, 40Cr, 35Crmo, 42Crmo, Surface Treatment: Blackened, Electrogalvanized, Dacromet, Hot-dip Galvanized, Galvanized, etc!
Nuts are fasteners with internal threads that are used in conjunction with bolts, and mechanical parts with internal threads that are used in conjunction with screws to transmit motion or power.