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Verified against official sources on 2026-10-09. This page is informational and is not customs or legal advice. Whether a measure applies to your goods, and how they are classified, valued and declared, is decided by the customs authority that handles the entry — CBSA for Canada, the customs authority of the member state of release for the EU, US Customs and Border Protection for the United States — and by what your broker actually files. Re-open the sources listed below before you rely on any figure.

Trade Compliance

How to check whether a trade measure applies to your shipment

A repeatable five-question test for fasteners — code, origin, date, exceptions, evidence — and how it resolves on the three measures that currently catch DIN, ISO and ASME fasteners: Canada's steel derivative surtax and anti-dumping case, EU CBAM, and US Section 232 derivative duties.

Bottom line

As of 2026-10-09, for importers, purchasing managers and design engineers moving fasteners into Canada, the EU or the United States: no single database answers this question. The answer is fixed by five things, in this order — the tariff line, the origin of the goods and of the metal, the date the entry or release happens, the exceptions written into the instrument itself, and the documents you can produce. Two of the three measures below are country-neutral on their face: changing origin does not remove them, it changes a different layer of cost.

The five questions, in order

Ask them in this sequence. An answer to a later question is worthless if an earlier one is wrong.

Question	What fixes the answer	Where to check it	How it goes wrong
1. Code	The tariff item at the granularity the importing authority publishes: the 10-digit HTSUS statistical line (US), the 8-digit Canadian tariff item plus statistical suffix (Canada), the CN 8-digit code (EU).	The authority's own tariff database — USITC HTS Online Reference Tool, CBSA Customs Tariff Chapter 73 (T2026 edition), EU TARIC — not the six-digit code on a supplier invoice.	A DIN 933 hex head screw and a DIN 912 socket head cap screw can sit on different lines, and the line decides both the rate and whether the goods are in scope at all.
2. Origin	Country of origin of the goods, plus the country of melt and pour for steel (smelt and cast for aluminium). Canada's derivative surtax determines origin under the CUSMA marking rules; US Section 232 asks for melt and pour per heat.	The origin clause of the instrument itself, the authority's entry guidance, and the mill's declaration — in writing, per lot.	Country of export is not country of melt and pour. A certificate of origin does not answer the metal-origin question.
3. Date	The event that puts the goods under the measure — normally entry for consumption, release for free circulation or accounting. Not the order date, the invoice date or the ship date.	The commencement clause of the instrument and the authority's notice. Check separately whether an in-transit clause exists for that measure.	Canada's derivative surtax excepts goods in transit on the coming-into-force day. The US Section 232 texts we read contain no in-transit clause, so there the entry date is the only anchor.
4. Exceptions	The exception list inside the instrument, read in order. Several steel measures are explicitly non-stackable, so a second surtax may not be added on top of the first.	The regulation or order text, plus the authority's notice on precedence and relief.	Relief is narrow and product-specific: Canada's remission order has four grounds, and its 7318 entries name items such as armour bolts and 316L stainless hex bolts — not a general carbon steel screw.
5. Evidence	The data the authority requires on the entry, and the supplier documents a claim must rest on. Default values apply where the file is incomplete.	The authority's entry guidance and required-data list; for CBAM, the implementing rules on embedded emissions.	Defaults are punitive by design. Where the CBSA fasteners file is incomplete, the normal value is set at the export price advanced by 170%, and the subsidy amount for China-origin goods at 1.25 Renminbi per kilogram.

The three measures this section covers

Each has its own instrument, its own authority and its own page in this section. Page links are in Where to continue at the end.

Measure	Instrument	Applies from	Origin scope	Fastener lines
Steel derivative surtax (Canada)	Steel Derivative Goods Surtax Order, SOR/2025-267	26 December 2025, at 25% of value for duty	All countries; only the listed exceptions	All twelve Canadian tariff items 7318.11.00 to 7318.29.00, plus 7317, 7320, 7326 and others
Anti-dumping and countervailing duties (Canada)	SIMA; CITT order continued in expiry review RR-2025-001	Order continued with amendment on 11 March 2026	Dumping: China and Chinese Taipei. Subsidy: China only	Case numbers 7318.11.00.00, 7318.12.00.00, 7318.14.00.00, 7318.15.00.10/.42/.45/.49 — CBSA states the list is for convenience of reference only
CBAM (EU)	Regulation (EU) 2023/956, Annex I, as amended by Regulation (EU) 2025/2083	Definitive-period obligations from 1 January 2026	Imports into the EU from third countries; embedded emissions follow where production happened	CN 7318, the whole heading — screws, bolts, nuts, washers including spring washers
Section 232 derivative duties (US)	Proclamations 10896, 10947, 11021 and 11032; HTSUS note 16 to subchapter III of chapter 99	Derivative list from 12 March 2025; full-value basis from 6 April 2026	All countries, with separate bands for the UK, Russia and USMCA goods	7318.11.00 to 7318.29.00 as derivative steel articles; aluminium only on named statistical lines such as 7616.10.9090

Timeline at a glance

The dates that move a fastener shipment. Verification date for every entry: 2026-10-09.

Date	Measure	What changed
26 December 2025	Canada, derivative surtax	SOR/2025-267 comes into force: 25% of value for duty on the listed steel derivative goods, including all of heading 7318, from all countries.
1 January 2026	EU, CBAM	Definitive-period provisions apply: only an authorised CBAM declarant may import Annex I goods, and emissions data must be verifiable.
11 March 2026	Canada, AD/CVD	The CITT continues the fasteners order, with amendment: expiry was likely to result in injury.
6 April 2026	US, Section 232	Duty moves to the full customs value of the product, regardless of metal content; 50% general rate, with 25% UK and 10% US-content bands.
8 June 2026	US, Section 232	Annexes modified under Proclamation 11032; the all-US content test moves to at least 85% of metal weight; headings 9903.82.20 to .26 in use.
1 February 2027	EU, CBAM	Certificate sales begin.
30 September 2027	EU, CBAM	First CBAM declaration and first surrender of certificates, for calendar year 2026.
1 July 2027	Canada, derivative surtax	End date for the automotive and aircraft use exemption: imports must be before this date.

How to run the check — six steps

Classify before you price. Take each invoice line to the importing authority's granularity, then write the code into the quotation. Where to check: USITC HTS Online Reference Tool, CBSA Customs Tariff Chapter 73 (T2026), EU TARIC. Start from the standard on the drawing — DIN 933, DIN 912, ASME B18.2.1 — because the head type and thread decide which line you land on.
Fix the origin in writing, including the metal. Ask the supplier for the country of origin, and for steel the country of melt and pour (for aluminium, smelt and cast), per heat or lot. Where to check: the origin clause of the instrument, and for US entries the CBP entry guidance that requires the melt-and-pour country to be reported.
Fix the operative date. Identify the event that triggers the measure on this shipment — entry for consumption, release for free circulation, or accounting — and the day it happens. Where to check: the commencement clause of the instrument and the authority's customs notice.
Read the exceptions inside the instrument, in order. Check precedence before you count two surtaxes on one entry. Where to check: the order or regulation text and the authority notice on non-stackability; for Canada, SOR/2025-267 section 2 and Customs Notice 25-33.
Assemble the evidence before the goods land. Entry data, a signed melt-and-pour declaration, and — for the EU — embedded-emissions data that can support verification by an accredited verifier. Where to check: the authority's required-data list and, for CBAM, the implementing rules.
Get your broker's confirmation in writing. Ask for the code used on the entry, the origin data transmitted, and which other measures apply to the same line — for US entries that includes Section 301, IEEPA and reciprocal tariffs, whose rates we have not verified for 7318 on 2026-10-09.

Common misreadings

Each claim below circulates in trade commentary; the right-hand column is what the official documents actually say.

What circulates	What the official documents say
“There is one database that answers this.”	There is not. Each measure has its own instrument, its own authority and its own list, and the lists are revised on different cycles.
“The HS6 code on the invoice is enough.”	Six digits do not decide scope or rate. Canada and the US publish 8- and 10-digit lines, and the specific line is what appears on the entry.
“The duty is charged on the steel content.”	For chapter 73 fasteners under Section 232 the base has been the full customs value since 6 April 2026. Before that, the chapter 73 rate column was already expressed as a plain ad valorem rate; the steel-content formula applied to derivative articles outside chapter 73.
“Shipping before the effective date is an exemption.”	The trigger is the entry or accounting event. Canada excepts goods in transit on the coming-into-force day; the US texts we read contain no in-transit clause.
“There is an exclusion I can apply for.”	US product exclusions are terminated. Canada's remission order has four narrow grounds. CBAM has no exclusion for these goods — only the 50-tonne threshold, which exempts an importer for the year rather than a product.
“A certificate removes the charge.”	CBAM is a declaration-and-surrender mechanism operated through the CBAM registry, not an import duty. An incorrect declaration is the importer's exposure.

What we could not confirm

Open items, listed as they stand on 2026-10-09. Nothing below has been upgraded to a conclusion anywhere on this page.

We could not confirm any single official source that answers all five questions for all three measures; each step above points at a different authority and a different database.
Exporter-specific normal values and subsidy amounts in the Canadian fasteners case: CBSA does not publish them per exporter in the sources we read.
CBAM default values and the Chinese grid emission factor; the method for embedded emissions of precursors and complex goods; whether the proposed extension to downstream products has been adopted; mutual recognition with third-country schemes.
The other US duty layers on the same HTS lines — Section 301, IEEPA and reciprocal tariffs for 7318 on 2026-10-09. We publish no rates for them.
Whether any Canadian remission instrument beyond SOR/2026-34 exists, in particular for goods that cannot be sourced domestically or with a serious economic impact. We did not find one.
Whether a specific DIN 933 size and property class falls inside the Canadian SIMA product definition; that is a case-by-case question, not a table lookup.

Each measure page carries its own open list. This page repeats them in summary form only, and adds nothing to them.

Sources

Official sources only, in the three jurisdictions. All opened and verified on 2026-10-09.

Jurisdiction	Sources used for the summary above	Level
Canada	Steel Derivative Goods Surtax Order, SOR/2025-267 (consolidated); SOR/2025-154; Steel Derivative Goods Surtax Remission Order, SOR/2026-34; CBSA Customs Notice 25-33; CBSA Fasteners: Measures in force; CITT Order and Reasons, RR-2025-001; Customs Tariff, Chapter 73 (T2026)	A and B
European Union	Regulation (EU) 2023/956 (CBAM), Annex I, Articles 4, 6(1), 8, 15, 22(1), 36(2); Regulation (EU) 2025/2083, Article 2a, Annex VII	A
United States	Proclamation 10896; BIS, 90 FR 11249; Proclamation 10947; Proclamation 11021; Proclamation 11032; CBP CSMS # 68253075; CBP CSMS # 68855869; USITC HTS online reference tool	A and B

A = instrument, official register or tribunal text. B = official guidance or an official database page, quoted as guidance and not as the legal text. Third-party commentary was used only as a lead for the three topic pages and is not relied on for any statement here.