andrew_j
The best source for SIC/NAICS Code information is the U.S. Census Bureau.
Your codes are most likely:
SIC Code 50 - Wholesale Trade, Durable Goods
SIC Subset 5084 - Industrial Machinery and Equipment
NAICS Code 421 - Wholesale Trade, Durable Goods
NAICS Subset 4218 - Machinery, Equipment, and Supplies Wholesalers.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.