... vacuum cleaners,lamps and lanterns,bicycles,sports equipment ,etcpacking:A. inner packing:polybag B. outer packing: Several polybag in one ... spring nuts, T nuts, K nuts, rivet nuts, cage nuts, lock nuts, hex nuts, hex flange nuts, wing nuts, weld nuts ... , square nuts, cap nuts.Washers: flat washers, spring washers, lock washers, structural Washers. square washer, bowl washer.Screws: machine screws ...