Rubber rings (O-ring)

Vulcanised rubber O-rings and seals for pressure cookers

BIS QCO APPLICABLE · ISI MARK SCHEME · IS 7466

HSN 4016 93 20 (rubber O-rings) is covered by a Bureau of Indian Standards Quality Control Order. Conformity to IS 7466:1994 is mandatory under the ISI Mark Scheme with effect from 15 July 2024, by virtue of the Rubber Gasket for Pressure Cookers (Quality Control) Order, 2023. No separate customs-clearance overlay applies beyond the BIS QCO obligation.

What this is

HSN code

4016 93 20

Chapter

40 · Rubber and articles thereof

BIS QCO

Applicable · ISI Mark Scheme · CM/L required

Indian Standard

IS 7466:1994 · effective 15-07-2024

Applicable Partner Government Agencies

BISBIS·Bureau of Indian Standards

Compliance steps

1
Source only from a Bureau of Indian Standards CM/L-licensed manufacturer holding a current licence against IS 7466:1994. Verify the supplier's CM/L number, licensed product scope, and licensed manufacturing facility address on the BIS online register before placing the purchase order.
Rubber Gasket for Pressure Cookers (Quality Control) Order, 2023 · S.O. 5371(E) dated 14-12-2023
2
Ensure every O-ring or rubber seal bears the ISI mark and the supplier's CM/L number in accordance with Scheme-I of the BIS (Conformity Assessment) Regulations, 2018. The marking must appear on the product or its smallest unit of sale, not only on outer packaging.
Scheme-I of the BIS (Conformity Assessment) Regulations, 2018 · Rubber Gasket for Pressure Cookers (Quality Control) Order, 2023
3
Confirm the applicable enforcement date for the supplying enterprise category: 15 April 2024 for small enterprises, 15 July 2024 for general importers, and 15 December 2024 for micro enterprises. Obtain written confirmation from the supplier of its MSME category where the phased date is relied upon.
S.O. 5371(E) dated 14-12-2023 · Rubber Gasket for Pressure Cookers (Quality Control) Order, 2023
4
Quote the supplier's BIS CM/L number on the bill of entry. Customs verifies the CM/L against the BIS online register in real time; a CM/L that is absent, expired, or whose product scope does not cover the consigned O-ring specification triggers consignment detention.
BIS Act, 2016 · Rubber Gasket for Pressure Cookers (Quality Control) Order, 2023 · Customs Act, 1962

A word of counsel

The single most common error on this tariff line is importing O-rings for non-pressure-cooker applications under the assumption that the QCO does not apply because the end-use is industrial or automotive. The IS 7466:1994 obligation attaches to the tariff item as classified under HSN 4016 93 20, not to a declared end-use; customs does not recognise an end-use carve-out absent a specific exemption notification, and a consignment of O-rings without a valid CM/L is detained regardless of the buyer's intended application.

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Frequently asked

Does HSN 4016 93 20 require BIS certification?

Yes. Conformity to IS 7466:1994 is mandatory under the ISI Mark Scheme with effect from 15 July 2024 for general importers, by virtue of the Rubber Gasket for Pressure Cookers (Quality Control) Order, 2023 notified under S.O. 5371(E).

Do phased enforcement dates apply to micro and small enterprises?

Yes. The enforcement date is 15 April 2024 for small enterprises and 15 December 2024 for micro enterprises as defined under the MSMED Act; general importers are subject to the 15 July 2024 date.

Does the QCO apply only to O-rings used in pressure cookers, or to all O-rings under this HSN?

The Quality Control Order is framed as the Rubber Gasket for Pressure Cookers (Quality Control) Order, 2023 and IS 7466:1994 governs the specification for that product scope. Importers relying on a different end-use must obtain specific regulatory confirmation before treating the QCO as inapplicable to their consignment.

Does a single CM/L licence cover all O-ring sizes and compound grades from the same manufacturer?

No. A CM/L licence is scope-specific by product specification, dimensional range, and manufacturing facility; O-rings outside the licensed specification or from an unlicensed plant are not covered and attract detention at port.

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