Subheading 8433.53 · Section XVI
8433.53 Harvesting machinery; for roots or tubers
84 Machinery and mechanical appliances, boilers, nuclear reactors; parts thereof
8433 Harvesting and threshing machinery, straw and fodder balers, grass or hay mowers; machines for cleaning, sorting or grading eggs, fruit or other agricultural produce, other than machinery of heading no 8437
8433.53 For roots or tubers
Other subheadings under 8433
8433.11 Lawn, parks or sports-grounds, powered, with the cutting device rotating in a horizontal plane 8433.19 For lawns, parks or sports-grounds, other than with the cutting device rotating in a horizontal plane 8433.20 N.e.c. in item no. 8433.1 (including cutter bars for tractor mounting) 8433.30 Haymaking machinery 8433.40 Straw or fodder balers, including pick-up balers 8433.51 Combine harvester-threshers 8433.52 Other than combine harvester-threshers 8433.59 N.e.c. in heading no. 8433 8433.60 For cleaning, sorting or grading eggs, fruit or other agricultural produce 8433.90 Parts, including parts of threshing machinery, straw or fodder balers and grass or hay mowers
For Indian shipping bills you need 8 digits. These six-digit codes are the international HS 2022. India's ITC(HS) classification (DGFT) and Customs Tariff (CBIC) add two more digits for the national tariff line, so pick the 8-digit line under your 6-digit code there, and confirm with your customs broker for anything borderline.