HSN Codes · Chapter 84: Machinery and Mechanical Appliances

HSN Code 8405

Producer gas or water gas generators, with or without their purifiers; acetylene gas generators and similar water process gas generators, with or without their purifiers

Typical GST rate

Varies

Depends on sub-classification

Type

Goods

HSN classification

Code level

4-digit

Heading

Reading code 8405

The first two digits (84) place this code in chapter 84 — Machinery and Mechanical Appliances. As a 4-digit heading it groups a whole product family; 6 and 8-digit codes underneath it get more specific. Remember: you can never invent a shorter code by truncating a longer one — only codes that exist in the official tariff are valid.

The biggest goods chapter: engines, pumps, compressors, ACs, refrigerators, computers and laptops (8471), and industrial machinery of every kind.

More specific codes under 8405

  • 840510 — Producer gas or water gas generators, with or without their purifiers, acetylene gas generators and similar water process gas generators, with or without their purifiers
  • 84051010 — Producer gas or water gas generators, with or without their purifiers, acetylene gas generators and similar water process gas generators, with or without their purifiers — producer gas or water gas generators
  • 84051020 — Producer gas or water gas generators, with or without their purifiers, acetylene gas generators and similar water process gas generators, with or without their purifiers — acetylene gas generators
  • 84051090 — Producer gas or water gas generators, with or without their purifiers, acetylene gas generators and similar water process gas generators, with or without their purifiers — other
  • 840590 — Producer gas or water gas generators, with or without their purifiers; acetylene gas generators and similar water process gas generators, with or without their purifiers — parts
  • 84059000 — Producer gas or water gas generators, with or without their purifiers; acetylene gas generators and similar water process gas generators, with or without their purifiers — parts — parts

Frequently asked questions

The GST rate under 8405 depends on the specific item and applicable notifications. Check the classification with our HSN code finder and confirm the rate before invoicing.
Businesses with annual aggregate turnover of ₹5 crore or more must report at least 6 digits on e-invoices and e-way bills; below ₹5 crore, 4 digits is the B2B minimum. Exports require 8 digits.
Every line item on a GST tax invoice carries its HSN code alongside the description, quantity, taxable value, and tax breakup. The code also flows into your GSTR-1 HSN summary and e-way bills.

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