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 83 Transmission shafts and cranks; bearing housings; gears...; flywheels... 84 83 20 For engines of vehicles of Chapter 87 84 83 20 30 For engines of vehicles of Chapter 87 Commodity Code Description 84 83 20 30 00 For engines of vehicles of Chapter 87