12. Metals Fabrication Product Characterization - The Department of Commerce classification codes divide this industry by product and services. SIC code 34 is further divided as follows : SIC 341 -Metal Cans and Shipping Containers SIC 342 -Cutlery, Handtools, and General Hardware SIC 343 -Heating Equipment, Except Electric and Warm Air, andPlumbing Fixtures SIC 344 -Fabricated Structural Metal Products SIC 345 -Screw Machine Products, and Bolts, Nuts, Screws, Rivets, and Washers SIC 346 -Metal Forgings and Stampings SIC 347 -Coating, Engraving, and Allied Services SIC 348 -Ordnance and Accessories, Except Vehicles and Guided Missiles SIC 349 -Miscellaneous Fabricated Metal Products.