Sourcing manual torque multipliers from China
The supplied heading 8204 lines carry a uniform 0% UK duty on goods from China. Confirm the manual multiplier's classification from its design, rather than its sales name. Consumer products supplied in Great Britain must be safe. Cambridge China Bridge sources manual torque multipliers.
UK duty and classification
Read from the UK Trade Tariff on 30 September 2026, heading 8204 covers hand-operated spanners and wrenches, including torque meter wrenches, and interchangeable spanner sockets with or without handles. This guide concerns manually driven torque multipliers and their associated wrench and socket purchases.
All supplied commodity lines carry 0% duty for goods from China. The supplied tariff record lists no anti-dumping or countervailing measures, suspensions or attached import controls. The socket line appears separately for goods with and without handles; these are descriptions within the same commodity line.
The heading description does not expressly name torque multipliers. Give your customs broker the mechanism drawing, operating instructions and contents list to confirm the commodity code. See the torque wrench guide for the wider heading.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| Non-adjustable hand-operated wrenches; confirm applicability to the multiplier | 8204 11 00 00 | 0% | None |
| Adjustable hand-operated wrenches supplied alongside the multiplier | 8204 12 00 00 | 0% | None |
| Interchangeable spanner sockets without handles | 8204 20 00 00 | 0% | None |
Specify output torque and reaction geometry
Specify maximum input and output torque, operating direction, input and output drive sizes, usable clearance and reaction arm geometry. Ask the factory to distinguish the gear ratio from the measured torque multiplication ratio. Agree an output torque test using measured input torque, with acceptance criteria recorded before production.
Define the intended fasteners and available reaction surfaces. Request instructions showing reaction arm positioning, pinch points, permitted accessories and how stored torque is released. Tools used at work fall within HSE's definition of work equipment. For consumer supply in Great Britain, the general product safety framework requires safe products.
Request separate evidence for the multiplier's output performance and the input torque wrench's calibration. A torque wrench certificate does not demonstrate the multiplier's output. Agree material, heat treatment, lubrication and spare reaction arm specifications; use testing and certification support to define the evidence needed.
Worked duty example
Illustrative example, not a quote: Illustrative small-business stock order of sockets for manual torque multipliers under 8204 20 00 00, invoiced at £4,000 free on board, with £2,000 of freight and insurance to the UK. The customs value is £6,000. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £6,000, so it is £1,200. 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
Torque performance: measure input and output torque against the agreed test plan, check repeatability and direction, and record the tool identification with each result.
Reaction assembly: check arm dimensions, attachment security and contact geometry against the approved drawing; inspect for cracks or permanent deformation after the agreed load test.
Drives and sockets: gauge fit and retention, check for excessive play, and inspect drive squares and sockets for damage after testing.
Instructions and packing: match model markings and operating limits to the supplied documents; confirm accessories, protective packing and any anti-backlash release instructions.
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What goes wrong
A quoted gear ratio can be mistaken for a verified torque multiplication ratio. That can leave the buyer without evidence of actual fastener torque. Reaction arms can also fit the tool yet fail to reach a suitable reaction surface on the intended assembly. Test the complete setup on a representative fixture before accepting the design.
Look for gear binding, excessive backlash, slipping socket retention and deformation at the reaction arm connection. Inconsistent lubrication or heat treatment can undermine an otherwise acceptable sample. Keep the approved drawing and test method with the inspection brief, and compare production samples against them.
Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For repeat volumes, see container programmes.
Frequently asked questions
What is the UK import duty on manual torque multipliers from China?
The supplied heading 8204 lines carry 0% duty from China. Confirm that the exact manual multiplier belongs in this heading before declaring it; the tariff description does not expressly name multipliers.
Is the gear ratio enough to calculate output torque?
Ask for measured input and output torque under the agreed test conditions. Treat a gear ratio as a design detail until the supplier demonstrates the actual torque multiplication performance.
Does a torque wrench calibration certificate cover the multiplier?
Request separate multiplier output test results. The input wrench's calibration certificate does not establish the performance of the gearbox, output drive or reaction assembly.
What should I send the factory before ordering?
Send the fastener details, target torque, drive sizes, clearance drawing and available reaction surfaces. Agree the reaction arm, operating instructions, accessories and acceptance test before production.