Viton O-Ring for Hydraulic Cylinder Seals
High-temperature resistant Viton (FKM) O-ring used in hydraulic cylinders for heavy machinery. Classified under HTS 4016.93.50.10 due to its vulcanized rubber composition and role as a precision seal with circular cross-section. Excludes hard rubber per Chapter 40 notes.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If supplied in uncut plate/sheet form over 5mm thick before fabrication
Unworked plates, sheets, or profiles of vulcanized rubber classify in 4008 per Chapter notes, not finished seals.
If imported specifically as parts of cranes or lifting machinery
Machinery parts of Chapter 84 supersede general rubber articles when principal use is identified.
If made of silicone rubber instead of standard nitrile/Viton
Different rubber polymers may shift to other statistical suffixes within the gaskets/seals subheading.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Include chemical resistance certifications (e.g
• ASTM standards) to support rubber classification and duty rate application
• Avoid bulk packaging that suggests 'parts of machines' to prevent reclassification under heading 8484
• Declare exact durometer hardness to confirm not hard rubber, which would exclude from this HTS
Related Products under HTS 4016.93.50.10
Nitrile O-Ring for Automotive Fuel Injectors
A vulcanized nitrile rubber O-ring designed for sealing fuel injector connections in gasoline engines. It falls under HTS 4016.93.50.10 as an O-ring, which is a specific type of gasket, washer, or seal made from vulcanized rubber other than hard rubber. The circular cross-section and sealing function classify it here.
Silicone O-Ring for Plumbing Fixtures
Flexible silicone rubber O-ring for sealing faucet and valve connections in residential plumbing. It qualifies under HTS 4016.93.50.10 as a vulcanized rubber seal (O-ring) not covered by exclusions like Chapter 64 footwear. Food-grade variants common for potable water systems.
EPDM O-Ring for HVAC Compressor
Weather-resistant EPDM rubber O-ring sealing refrigerant lines in air conditioning compressors. Falls under HTS 4016.93.50.10 as other vulcanized rubber O-rings used for pressure sealing. Not electrical appliances excluded by Chapter notes.
FFKM O-Ring for Chemical Processing Pumps
Perfluoroelastomer (FFKM) O-ring for extreme chemical resistance in industrial pump seals. Classified as HTS 4016.93.50.10 for its vulcanized rubber O-ring form, excluding hard rubber. Handles corrosive acids and high pressures.
Neoprene O-Ring for Marine Engine Seals
Saltwater-resistant neoprene CR O-ring for outboard motor water pump seals. HTS 4016.93.50.10 applies to this vulcanized rubber O-ring gasket not covered by Chapter 89 exclusions. Provides UV and hydrolysis protection.
NBR O-Ring Assortment for General Industrial Use
Standard nitrile butadiene rubber (NBR) O-ring kit in various AS568 sizes for maintenance applications. Falls under HTS 4016.93.50.10 as assorted vulcanized rubber O-rings (other seals). Common in MRO inventories.