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N362265 · 2026-07-13 — The tariff classification of an intake manifold gasket from South Korea
The under consideration is an intake manifold gasket, part number 558436, which you state is used between the intake manifold and the cylinder head to provide a seal, prevent the intake of ambient air, and leakage of internal fluids. You state that the gasket is composed of 100% FKM rubber. FKM, also called fluoroelastomer or fluorine rubber, is a family of synthetic rubbers. The applicable subheading for the FKM gaskets will be 8409.99.9190, Harmonized Tariff Schedule of the United States (HTSUS), which provides for “Parts suitable for use solely or principally with the engines of heading…
N354570 · 2025-10-28 — The tariff classification of gaskets assemblies for heavy-duty diesel trucks from Mexico
The items under consideration have been identified as a family of gasket assemblies specially designed for use in heavy-duty diesel truck engines. You state that each gasket consists of a stamped substrate of ASTM A463 aluminized steel sheeting that is permanently overmolded with an elastomer sealing bead. During the molding process, an adhesive system will be employed so that the elastomer bead will be permanently bonded to the steel stamping, creating an inseparable composite article. The steel substrate provides the structural form and dimensional stability, while the elastomer bead…
N316797 · 2021-01-12 — The tariff classification of exhaust manifold end pieces from the United Kingdom
The items under consideration have been identified as Exhaust Manifold End Pieces made of cast iron. In the supplemental information, which you provided per our request, you indicated that the parts are used on the hot side of a truck engine. These components are parts of the exhaust manifold. The manifold is located between the engine block and the turbo charger. You state that the function of the manifold is to guide the hot gas out of the engine into the turbo charger. The end pieces are used to guide the gas from cylinder 1 and 2 and from cylinder 5 and 6. The gas from cylinder 3 and 4 is…
N312525 · 2020-07-08 — The tariff classification of a roller blank from Germany.
The item under consideration is a Roller Blank, which is used to produce a rocker arm assembly. The purpose of a rocker arm assembly is to transfer energy from a cam lobe to open a poppet valve used for intake/exhaust in a diesel engine. As the cam lobe is raised, this causes the rocker to press down on a valve stem, which causes the valve to open. In this mechanism, a roller contacts the cam lobe and transfers energy to the rocker. Once energy is transferred to the rocker, the valve stem is lowered causing to open or close the valve. As imported, the roller forms an integral part of the…
N312073 · 2020-06-17 — The tariff classification of cast-iron cylinder head and block castings from Germany.
The products under review are Cast-Iron Cylinder Head and Block castings, which are designed to be used with vehicle heavy duty diesel engines. You state that the castings will undergo the following steps prior to importation into the United States: (A) Manufacturing the cast-iron part: 1. Core making, 2. Core package assembly, 3. Painting core package, 4. Mold preparation, 5. Locating core package in mold, 6. Pouring, 7. Cooling down; (B) Cleaning (or “fettling”) the casting and rough machining for the removal of fins, gates, sprues and risers: 8. Removing sand, 9. Breaking gating system…
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