HSN heading 8421 falls under Chapter 84 — nuclear reactors, boilers, machinery and mechanical appliances; parts thereof. It breaks down into 12 sub-codes listed below.
Sub-codes under 8421 (12)
842111
CREAM SEPARATORS
842112
CLOTHES-DRYERS
842119
OTHER :
842121
FOR FILTERING OR PURIFYING WATER :
842122
FOR FILTERING OR PURIFYING BEVERAGES OTHER THAN WATER
842123
OIL OR PETROL-FILTERS FOR INTERNAL COMBUSTION ENGINES
842129
OTHER
842131
INTAKE AIR FILTERS FOR INTERNAL COMBUSTION ENGINES
842132
CATALYTIC CONVERTERS OR PARTICULATE FILTERS, WHETHER OR NOT COMBINED, FOR PURIFYING OR FILTERING EXHAUST GASES FROM INTERNAL COMBUSTION ENGINES
842139
OTHER :
842191
OF CENTRIFUGES, INCLUDING CENTRIFUGAL DRYERS
842199
OTHER
About HSN heading 8421
The 4-digit code 8421 is an HSN heading — a mid-level grouping that breaks down further into 6-digit sub-headings and 8-digit tariff items. Choose the most specific sub-code that matches your supply so the GST rate, e-invoice schema, and GSTR-1 HSN summary all line up correctly. It sits inside Chapter 84, which covers nuclear reactors, boilers, machinery and mechanical appliances; parts thereof.