Includes
Brake Beams and Components; Couplers; Trucks and Components; Journals and Components; Wheel Sets and Components.

Excludes
Railroad Furniture (FSG 71).

Possible NAICS Codes
336510 – Railroad Rolling Stock Manufacturing
313220 – Narrow Fabric Mills and Schiffli Machine Embroidery
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
332312 – Fabricated Structural Metal Manufacturing
488210 – Support Activities for Rail Transportation
423860 – Transportation Equipment and Supplies (except Motor Vehicle) Merchant Wholesalers
333120 – Construction Machinery Manufacturing
331110 – Iron and Steel Mills and Ferroalloy Manufacturing
327390 – Other Concrete Product Manufacturing
561990 – All Other Support Services