HSN Codes · Chapter 73: Articles of Iron or Steel

HSN Code 7318

Screws, bolts, nuts, washers of iron or steel

Typical GST rate

18%

9% CGST + 9% SGST intra-state

Type

Goods

HSN classification

Code level

4-digit

Heading

Reading code 7318

The first two digits (73) place this code in chapter 73 — Articles of Iron or Steel. 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.

Pipes and tubes, structures, fasteners, utensils, and every fabricated iron or steel article — one of the highest-traffic HSN chapters.

More specific codes under 7318

  • 731811 — Screws, bolts, nuts, coach-screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel — coach screws
  • 73181110 — Screws, bolts, nuts, coach-screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel — coach screws — machine screws
  • 73181190 — Screws, bolts, nuts, coach-screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel — coach screws — other
  • 731812 — Screws, bolts, nuts, coach-screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel — other wood screws
  • 73181200 — Screws, bolts, nuts, coach-screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel — other wood screws — other wood screws
  • 731813 — Screws, bolts, nuts, coach-screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel — screw hooks and screw rings
  • 73181300 — Screws, bolts, nuts, coach-screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel — screw hooks and screw rings — screw hooks and screw rings
  • 731814 — Screws, bolts, nuts, coach-screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel — self-tapping screws
  • 73181400 — Screws, bolts, nuts, coach-screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel — self-tapping screws — self-tapping screws
  • 731815 — Other screws and bolts, whether or not with their nuts or washers

Frequently asked questions

Goods and services under 7318 typically attract 18% GST. Rates can vary by sub-classification and notifications, so confirm the applicable rate for your specific item.
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.

Related tools & guides

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