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.
Railroad Rails; Railroad Tie Plates; Railroad Turnouts and Components; Railroad Spikes.
Ballast (FSC 5610); Railroad Ties (FSC 5510).
Possible NAICS Codes
331110 – Iron and Steel Mills and Ferroalloy Manufacturing
326199 – All Other Plastics Product Manufacturing
327390 – Other Concrete Product Manufacturing
336510 – Railroad Rolling Stock Manufacturing
237990 – Other Heavy and Civil Engineering Construction
423860 – Transportation Equipment and Supplies (except Motor Vehicle) Merchant Wholesalers
532411 – Commercial Air, Rail, and Water Transportation Equipment Rental and Leasing
331511 – Iron Foundries
488210 – Support Activities for Rail Transportation
423840 – Industrial Supplies Merchant Wholesalers