Fittings for doors and windows

Tower bolts of base metal for buildings

BIS QCO APPLICABLE · ISI MARK SCHEME · IS 204(part 2)

HSN 8302 41 10 (tower bolts of base metal suitable for buildings) is covered by a Bureau of Indian Standards Quality Control Order. Conformity to IS 204 (Part 1):1991, IS 204 (Part 2):1992, or IS 15833:2009 is mandatory under the ISI Mark Scheme with effect from 12 July 2024, by virtue of the Bolts, Nuts and Fasteners (Quality Control) Order, 2024. No separate customs-clearance overlay applies to this tariff line.

What this is

HSN code

8302 41 10

Chapter

83 · Miscellaneous articles of base metal

BIS QCO

Applicable · ISI Mark Scheme · CM/L required

Indian Standard

IS 204 (Part 2) · effective 12-07-2024

Applicable Partner Government Agencies

BISBIS·Bureau of Indian Standards

Compliance steps

1
Identify the metallurgy of the tower bolts being imported and map to the correct Indian Standard: IS 204 (Part 1):1991 for ferrous metal tower bolts, IS 204 (Part 2):1992 for non-ferrous metal tower bolts, and IS 15833:2009 for stainless steel tower bolts. Source only from a Bureau of Indian Standards CM/L-licensed manufacturer whose licence explicitly covers the applicable IS and material grade.
Bolts, Nuts and Fasteners (Quality Control) Order, 2024 · S.O. 2771(E) dated 12-07-2024
2
Verify the supplier's BIS CM/L licence number on the BIS online register before placing the purchase order. Confirm the licensed scope specifies the correct IS part number, material type, and manufacturing facility address for the consignment being imported.
Bolts, Nuts and Fasteners (Quality Control) Order, 2024 · S.O. 2771(E) dated 12-07-2024
3
Ensure every tower bolt in the consignment bears the ISI mark and the supplier's CM/L number under Scheme-I of Schedule-II to the BIS (Conformity Assessment) Regulations, 2018. Marking must appear on the product itself; marking on packaging alone does not satisfy the requirement.
Scheme-I of Schedule-II to the BIS (Conformity Assessment) Regulations, 2018 · Bolts, Nuts and Fasteners (Quality Control) Order, 2024
4
Quote the supplier's BIS CM/L number on the bill of entry. Customs verifies the CM/L in real time against the BIS register; an absent, expired, or scope-mismatched licence triggers consignment detention, demurrage, and potential re-export or confiscation.
BIS Act, 2016 · Bolts, Nuts and Fasteners (Quality Control) Order, 2024 · Customs Act, 1962

A word of counsel

The single most common error on this tariff line is treating tower bolts as generic hardware fittings without distinguishing material grade — ferrous, non-ferrous, and stainless steel each map to a different IS part, and a CM/L licence under IS 204 (Part 1):1991 does not authorise import of non-ferrous or stainless steel tower bolts. Customs examination at port identifies the metallurgy from the supplier's own test reports, and a material-to-IS mismatch between the CM/L and the actual consignment results in detention regardless of whether a valid licence exists for a different part of the same standard.

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Frequently asked

Does HSN 8302 41 10 require BIS certification?

Yes. Tower bolts classified under this tariff line require conformity to IS 204 (Part 1):1991, IS 204 (Part 2):1992, or IS 15833:2009 under the ISI Mark Scheme, mandatory with effect from 12 July 2024 under the Bolts, Nuts and Fasteners (Quality Control) Order, 2024.

Which Indian Standard applies to stainless steel tower bolts under this HSN?

IS 15833:2009 applies to stainless steel tower bolts. IS 204 (Part 1):1991 covers ferrous metal tower bolts and IS 204 (Part 2):1992 covers non-ferrous metal tower bolts; the correct IS is determined by the metallurgy of the product being imported.

Does a CM/L licence under one part of IS 204 cover tower bolts of all metal types?

No. A CM/L licence is IS-part-specific and material-specific; a licence under IS 204 (Part 1):1991 covers only ferrous metal tower bolts and does not authorise import of non-ferrous variants covered by IS 204 (Part 2):1992 or stainless steel variants covered by IS 15833:2009.

Is the CM/L licence facility-specific or does it cover a manufacturer's entire production range?

The CM/L is facility-specific and scope-specific; tower bolts manufactured at a plant not named in the licence, or outside the licensed specification range, are not covered, and import of such bolts constitutes a breach of the BIS Quality Control Order.

Last verified against gazette notifications: 2026-05-18. Source: BIS / Indian Customs CUSDATA.