Sourcing marine rudder stocks from China
Marine rudder stocks classified under the selected heading 8487 lines carry 0% UK duty from China. The duty range is therefore 0% throughout, but this residual heading needs confirmation against the actual part. Specify material, bearing fits and shaft straightness. Cambridge China Bridge sources marine rudder stocks.
Zero duty, subject to the correct classification
Read from the UK Trade Tariff on 1 October 2026, the selected heading 8487 lines carried 0% duty for goods from China. The supplied tariff record lists no anti-dumping or countervailing duty, suspensions or attached import controls for these lines.
Heading 8487 covers machinery parts without electrical features that are not specified elsewhere in the chapter. It is a residual heading, so a supplier's description of a rudder stock does not settle its classification. The table gives material-based candidates, rather than interchangeable codes.
Send the drawing, material and manufacturing route to your customs broker and confirm the commodity code before ordering. For the wider product family, see ship rudder assemblies.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| Cast steel parts, where applicable to the rudder stock | 8487 90 51 90 | 0% | None |
| Open-die or closed-die forged steel rudder stocks, subject to classification | 8487 90 57 90 | 0% | None |
| Other iron or steel rudder stocks, subject to classification | 8487 90 59 90 | 0% | None |
| Rudder stocks of other materials, subject to classification | 8487 90 90 90 | 0% | None |
Specify the shaft, bearing seats and rudder connection
Give the factory a controlled drawing showing overall length, stepped diameters, bearing seats, seal surfaces, shoulders, tapers, keyways, threads and the rudder connection. State the material grade, forging or casting route, heat treatment, straightness, run-out and surface finish. Identify the mating bearings, seals and steering arm so the factory can check the interfaces.
Ask for material certificates linked to the stock's heat identity, a dimensional report and the agreed defect-testing records. For vessels covered by the small fishing vessel code, steering gear including the rudder stock must be of sound and efficient construction and suitable for the vessel's size and power. Agree the design and acceptance criteria with the buyer's marine engineer before manufacture.
For recreational craft, the regulations cover separately marketed watercraft components listed in Schedule 2 when intended for installation in watercraft. Confirm whether the supplied product falls within that scope before agreeing its conformity marking; do not use a factory's generic CE certificate as the purchase specification.
Worked duty example
Illustrative example, not a quote: Illustrative order: 40 forged steel rudder stocks for small boats under 8487 90 57 90, invoiced at £27,000 free on board, with £2,000 of freight and insurance to the UK. The customs value is £29,000. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £29,000, so it is £5,800. 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
Material: match the stock identification to the material certificate and heat-treatment records; compare the reported grade and properties with the order.
Geometry: measure bearing seats, shoulders, taper, keyway and threads against the drawing; record straightness and run-out using the agreed datum arrangement.
Soundness: review the specified ultrasonic and surface defect tests, including their coverage and acceptance criteria; investigate indications around section changes and keyways.
Arrival condition: check for bent shafts, impact marks, rust and damaged seal surfaces; confirm the stock matches its report and trial-fit the mating parts before installation.
Working out your own order? Send us the product on WhatsApp and we reply the same working day: WhatsApp us
What goes wrong
A shaft can match its nominal diameter yet bind in the bearings because it is bent or its bearing seats are misaligned. A poor taper or misplaced keyway prevents the steering arm seating correctly. Rough or damaged seal surfaces can cause leakage, while material substitution or incorrect heat treatment can leave the stock unable to meet the specified properties.
Approve the dimensional and test records before shipment, and agree protective sleeves for machined surfaces and supports that prevent the shaft moving in its packing. Keep arrival inspection records linked to each stock. Use the quality inspection guide to plan checks before dispatch and after receipt.
Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For machinery and equipment, see machinery imports.
Frequently asked questions
What is the UK import duty on marine rudder stocks from China?
The selected heading 8487 lines carry 0% duty in the supplied tariff record. No anti-dumping or countervailing duty is listed. Confirm that the actual stock belongs under the selected code.
Which commodity code should I use for a forged rudder stock?
8487 90 57 90 is the supplied line for other open-die or closed-die forged iron or steel parts. Treat it as a candidate and ask your broker to confirm classification from the drawing and intended use.
What documents should I request from the factory?
Request a material certificate linked to the stock identity, heat-treatment records, a dimensional report and the defect-testing reports specified in the order.
What should I check when a rudder stock arrives?
Check identification, straightness, bearing fits, taper and keyway position, seal surfaces and transit damage. Compare the stock with its drawing and inspection records before installation.