This means that you'll be able to search for NAICS codes directly (if that's your jam). We'll do the math; let's make better data on public procurement together.
Angles; Channels; Tees; Zees.
Possible NAICS Codes
331491 – Nonferrous Metal (except Copper and Aluminum) Rolling, Drawing, and Extruding
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
488190 – Other Support Activities for Air Transportation
339950 – Sign Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
332710 – Machine Shops
332312 – Fabricated Structural Metal Manufacturing
339999 – All Other Miscellaneous Manufacturing
331110 – Iron and Steel Mills and Ferroalloy Manufacturing
423510 – Metal Service Centers and Other Metal Merchant Wholesalers