HS codes for injector pipes, hydraulic hoses and cab tilt parts: how to find the right one

The HS code of an injector pipe, a hydraulic hose or a cab tilt part follows from the wording of the tariff headings and section notes, not from the vehicle the part fits. A fuel pipe formed for an engine goes to heading 8409, plain steel tube to Chapter 73, rubber hose to 4009, plastic hose to 3917, a cab tilt cylinder to 8412 and its pump to 8413. The codes come from published customs decisions.

What is the difference between an HS code, a CN code and a GTİP?

An HS code has six digits and is shared between countries; the digits after the sixth are national or regional. In the EU, Regulation 2658/87 says that “each CN subheading shall have an eight digit code number”, and TARIC adds a 9th and a 10th digit. The US tariff schedule adds a 2-digit statistical suffix to its 8-digit subheading.

Türkiye’s code, the GTİP, has 12 digits. According to the Ministry of Trade, digits 1 to 6 are the Harmonized System code, 7 and 8 the EU’s Combined Nomenclature code, 9 and 10 national subdivisions opened for tax purposes, 11 and 12 statistical codes.

Is an injector pipe an engine part or a steel tube?

A pipe formed to a drawing for an engine is an engine part; a straight tube without fittings is a steel tube. The rule is note 2(b) to Section XVI: a part with no heading of its own, if “suitable for use solely or principally with a particular kind of machine”, goes to the parts heading for that machine. For engines that is 8409.

German customs used the note to put the common rail of a diesel engine in 8409. UK customs did the same with a stainless steel fuel tube, 666 mm long, that runs from the high-pressure pump to the injectors of a petrol engine.

A straight tube goes elsewhere. An expired German decision of 2020 (DEBTI13410/20-1) concerns a seamless stainless tube 648 mm long and 8 mm in diameter. It records that the tube will be made into injection lines, and still classifies it by material, in heading 7304. A Turkish decision in the table does the same in heading 7306.

For the diesel injector pipe itself we found no decision still in force. In 2018 French customs put a bent high-pressure diesel tube with two nuts in 8409910090; the decision (FRBTIFR-BTI-2018-01372) was later “invalidated due to incorrect classification”, and the database gives no corrected code. Our own reading of the subheading texts: 8409 91 00 covers parts of spark-ignition engines, so a diesel part belongs in 8409 99 00. The common rail is there, and so is a bent coolant pipe that German customs put in 8409990090 (DEBTI52652/24-1).

What decides the code of a hydraulic hose?

The material of the hose decides the heading; reinforcement and ends decide the subheading. Heading 4009 covers hoses of vulcanised rubber “with or without their fittings”, and its subheadings split by reinforcement and by whether fittings are attached. Heading 3917 splits plastic hose similarly. Rubber and PTFE hose are compared in a separate article.

The answer can change once hose and metal pipe form one line. German customs treated a power steering pressure line, bent for one vehicle and made of metal pipe sections and rubber hoses, as a vehicle part, code 8708999790. Its description gives the reason:

“… rubber hoses (not giving the essential character, therefore no classification in heading 4009) …”

Hauptzollamt Hannover, BTI decision DEBTI27410/25-1, 26 January 2026; translated from German

Do a cab tilt cylinder and pump count as vehicle parts?

No. The cylinder stays in heading 8412 and the pump in 8413. Note 2(e) to Section XVII keeps “machines or apparatus of headings 8401 to 8479” out of vehicle parts, even when identifiable as made for a vehicle. German customs classified a truck cab tilt cylinder and the hydraulic pump of a cab tilt mechanism in those two headings.

US Customs applied the same note in 2016. It revoked two 1996 rulings that had treated clutch master and slave cylinders as vehicle parts, moving the master cylinder to 8413.50.00 and the slave to 8412.21.00:

“Because the clutch master cylinder and clutch slave cylinder are classifiable in headings 8413 and 8412, HTSUS, respectively, their classification under heading 8708, HTSUS, is precluded by operation of Note 2(e) to Section XVII, HTSUS.”

U.S. Customs and Border Protection, HQ H195876, 24 March 2016

Sources: the EU’s EBTI database and the Turkish Ministry of Trade’s BTB search screen. Codes are written as in the databases, without spaces. Dates: issue (EU), start of validity (Türkiye).

Where do fittings and banjo ends go?

A tube fitting stays in its own heading, 7307, whatever machine it is screwed into. Note 2 to Section XV counts the articles of heading 7307 among “parts of general use”, and the notes to Sections XVI and XVII keep those out of machine and vehicle parts. Czech customs relied on that note for the banjo end of a turbocharger oil feed pipe, and rejected the engine parts code the applicant had proposed. Thread and seat types are covered in our article on fittings.

Who decides the code, and where do you ask for a binding answer?

The customs authority decides, and a binding answer comes as a written decision. In the EU that is a BTI. The European Commission describes it as issued by a member state’s customs authority and “generally valid for 3 years throughout the EU”; applications go through the EU Customs Trader Portal or, depending on the country, a national one.

In Türkiye the decision is called BTB. According to the Ministry of Trade, applications go to an authorised regional customs directorate or are filed electronically; a BTB is free and valid for 6 years from issue. US Customs publishes its rulings in the CROSS database. Our own advice for an application: describe the goods as the decisions above do.

1. Material. Steel grade; rubber or plastics; type of reinforcement.
2. Dimensions and shape. Diameter, wall thickness, length; straight or bent to a drawing.
3. Ends. Nuts, couplings or other fittings attached, or none.
4. Use. The engine or vehicle it is made for; a drawing, photographs or a sample.

Origin and movement documents are covered in our article on sourcing from Türkiye.

This article is not customs advice. The customs authority determines the code of the goods; for a binding result, apply for binding tariff information. Tariffs are updated every year; the codes here are as of the dates in the source list.