84831099 under HS Code TRANSMISSION SHAFTS (INCLUDING CAM SHAFTS AND CRANK SHAFTS) AND CRANKS; BEARING HOUSINGS AND PLAIN SHAFT BEARINGS; GEARS AND GEARING; BALL OR ROLLER SCREWS; GEAR BOXES AND OTHER SPEED CHANGERS, INCLUDING TORQUE CONVERTERS; FLYWHEELS AND PULLEYS, INCLUDING PULLEY BLOCKS; CLUTCHES AND SHAFT COUPLINGS (INCLUDING UNIVERSAL JOINTS) - OTHER : OTHER, 84669390 under HS Code PARTS AND ACCESSORIES SUITABLE FOR USE SOLELY OR PRINCIPALLY WITH THE MACHINES OF HEADINGS 8456 TO 8465, INCLUDING WORK OR TOOL HOLDERS, SELF-OPENING DIEHEADS, DIVIDING HEADS AND OTHER SPECIAL ATTACHMENTS FOR MACHINE-TOOLS; TOOL HOLDERS FOR ANY TYPE OF TOOL, FOR WORKING IN THE HAND - OTHER - FOR MACHINES OF HEADINGS 8456 TO 8461:OTHER, and 84821011 under HS Code BALL OR ROLLER BEARINGS - BALL BEARINGS: ADAPTER BALL BEARINGS (RADIAL TYPE) :NOT EXCEEDING 50MM OF BORE DIAMETER were the top imported HS Codes by SYSCOM LINEAR TRADERS in 2021.