8473.50
Parts and accessories equally suitable for use with machines of two or more of the headings 8470 to 8472:
Duty rates
“General” applies to imports from most trading partners under normal trade relations. “Special” lists products eligible for reduced or duty-free treatment under programs like GSP, USMCA, CAFTA-DR, or individual free-trade agreements. “Column 2” applies to imports from countries without normal trade relations (currently Cuba and North Korea).
Chapter 84
Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof (Section XVI — Machinery and mechanical appliances)