Section 16 Machinery and mechanical appliances; electrical equipment; parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers,and parts and accessories of such articles 84 Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof 84 03 Central heating boilers other than those of heading 84.02. 84 03 90 Parts Commodity Code Description 84 03 90 00 Parts