Sourcing metal window restrictors from China
Metal window opening restrictors from China carry 0% UK duty when classified as window fittings, with no trade remedy listed. Confirm applicable consumer-product safety requirements with the relevant authority. Specify the fitted opening gap, fixing substrate and release mechanism before ordering. Cambridge China Bridge sources metal window opening restrictors.
Duty and classification for window restrictors
Read from the UK Trade Tariff on 29 September 2026, heading 8302 covers base-metal mountings and fittings, including window fittings. Metal window opening restrictors classified under 8302 41 50 00 carry 0% duty for goods from China. The supplied record lists no anti-dumping or countervailing duty, suspension or attached import control for this line.
The table repeats the window-fitting code for different restrictor designs, rather than presenting separate tariff lines. Confirm the commodity code with drawings, material details and an explanation of the mechanism. For related window hardware within the wider heading, see window friction stays.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| Metal cable window restrictors, classified as window fittings | 8302 41 50 00 | 0% | None |
Specify the fitted opening and release mechanism
State the window opening style, frame material, sash dimensions and intended use. Specify cable, chain or arm construction, mounting positions, fixing-hole centres, bracket clearance and the maximum opening gap in the fitted assembly. Agree whether release uses a key, tool or manual latch, and how the restrictor re-engages after release. Approve a sample installed in the intended frame.
Specify metal grade, finish, cable terminations or arm joints, fixing screws and any plastic components. Agree load, repeated-operation and corrosion tests for the exact model and mounting arrangement. Confirm the importer's applicable consumer-product safety and labelling responsibilities with the relevant authority. Use testing and certification support to check the applicable construction-product assessment route.
For health and social care premises, HSE guidance says windows large enough for people to fall out should be restrained sufficiently to prevent falls. Match the restrictor and its fixings to the intended installation, and ask the buyer to confirm the release arrangement against the premises' safety assessment.
Worked duty example
Illustrative example, not a quote: Illustrative order: 2,000 metal window opening restrictors; FOB and freight values are illustrative under 8302 41 50 00, invoiced at £7,000 free on board, with £600 of freight and insurance to the UK. The customs value is £7,600. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £7,600, so it is £1,520. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.
Inspection checklist
Fit: compare brackets, fixing-hole centres and supplied screws with the approved drawing; fit samples to the intended frame and measure the restricted opening.
Operation: check engagement, release and re-engagement through repeated opening and closing; confirm that the mechanism does not obstruct normal window closure.
Strength and finish: inspect cable crimps, chain links, pivots, rivets and plastic spacers for damage or play; compare load-test evidence, metal and finish with the agreed specification.
Identification and packing: check model identification, matching keys, fixing packs and fitting instructions; protect cables and arms from transit damage. Arrange a shipment inspection.
What goes wrong
A correct cable or arm length can still give an excessive opening when brackets are mounted in the wrong positions. Screws can pull out of an unsuitable fixing substrate, while loose crimps, worn pivots or a latch that fails to re-engage can defeat the restriction. Check the complete installed assembly rather than accepting a loose mechanism.
An all-metal exterior can hide plastic components in the mechanism. HSE has flagged potential failure of window side-stay restrictors in health and social care premises. Record component materials and mounting details, and compare production samples with the approved assembly before shipment.
Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification.
Frequently asked questions
What is the UK import duty on metal window restrictors from China?
The supplied tariff record shows 0% duty under window-fitting code 8302 41 50 00, with no anti-dumping or countervailing duty, suspension or attached import control listed. Confirm classification for the actual product.
Which dimensions should I send to the factory?
Send frame and sash drawings, opening style, mounting positions, fixing-hole centres, bracket clearance and the required fitted opening gap. Specify the fixing substrate and release arrangement.
Can I approve a restrictor without installing it?
Install a sample in the intended frame. Check the restricted opening, fixing security, release, re-engagement and full closure. A loose sample cannot establish the behaviour of the fitted assembly.
What should I check on key-release restrictors?
Check that supplied keys match, release works consistently and the mechanism re-engages as agreed. Inspect the lock, cable termination or arm joints, and confirm fitting instructions match the approved installation.