Section 16 MACHINERY AND MECHANICAL APPLIANCES; ELECTRICAL EQUIPMENT; PARTS THERE OF; SOUND RECORDERS AND REPRODUCERS, TELEVISION IMAGE AND SOUND RECORD ERS AND REPRODUCERS, AND PARTS AND ACCESSORIES OF SUCH ARTICLES 84 Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof 84 83 Transmission shafts (including cam shafts and crank shafts) and cranks; bearing 84 83 10 84 83 10 00 Commodity Code Description 84 83 10 00 00 - Transmission shafts (including cam shafts and crank shafts) and cranks 84 83 20 00 00 - Bearing housings, incorporating ball or roller bearings 84 83 30 00 00 - Bearing housings, not incorporating ball or roller bearings; plain shaft bearings 84 83 40 00 00 - Gears and gearing, other than toothed wheels, chain sprockets and other transmission e 84 83 50 00 00 - Flywheels and pulleys, including pulley blocks 84 83 60 00 00 - Clutches and shaft couplings (including universal joints) 84 83 90 00 00 - Toothed wheels, chain sprockets and other transmission elements presented separately;