3452  Bolts, Nuts, Screws, Rivets, and Washers

Establishments primarily engaged in manufacturing metal bolts, nuts,
screws, rivets, washers, formed and threaded wire goods, and special
industrial fasteners. Rolling mills engaged in manufacturing similar
products are classified in major group 33; establishments primarily engaged
in manufacturing screw machine products are classified in industry 3451;
and those manufacturing plastics fasteners are classified in industry 3089.