Silicone O-Ring for Medical Device Connectors
Medical-grade silicone (polysiloxane) O-ring sealing tubing connectors in respiratory equipment. HTS 3926.90.4510 applies as plastic seal from heading 3910 silicones. Biocompatible for FDA-regulated devices.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If peroxide-cured silicone rubber
Certain silicone elastomers classified as rubber in 40 if not meeting plastic polymer purity.
If dedicated part of medical syringe or inhaler
Medical instrument parts under 9018 by specific end-use.
If articles for conveyance of liquids if pipe-like
Plastic tubes/pipes in 3923; O-rings as seals stay in 3926.
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 USP Class VI or ISO 10993 biocompatibility certs for medical claims
• Declare exact durometer (e.g
• 70A) for classification verification
Related Products under HTS 3926.90.45.10
Acetal (POM) O-Ring for Water Pump Seals
Polyoxymethylene (acetal/POM) O-ring for sealing automotive water pumps, low moisture absorption. Under 3926.90.4510 as plastic from 3907.40 polymers.
PEEK O-Ring for Aerospace Actuators
Polyetheretherketone (PEEK) high-temp O-ring sealing actuators in aircraft systems. 3926.90.4510 for engineering plastic seals.
PVC O-Ring for Plumbing Fixtures
Polyvinyl chloride (PVC) O-ring sealing compression fittings in plumbing. 3926.90.4510 plastic seal.
Nitrile Rubber O-Ring for Automotive Fuel Injectors
A synthetic rubber O-ring made from acrylonitrile-butadiene (NBR) polymer classified under Chapter 39, used to seal fuel injector connections in vehicle engines. It falls under HTS 3926.90.4510 as an O-ring gasket or seal of plastics. Designed for high resistance to oils and fuels in automotive applications.
Viton Fluoroelastomer O-Ring for Chemical Processing
High-performance O-ring from fluoropolymer (FKM/Viton) for sealing valves in chemical plants, resistant to harsh acids and high temperatures. Classified in 3926.90.4510 as a plastic O-ring seal due to its synthetic polymer base from headings 3901-3914. Ensures leak-proof operation in corrosive environments.
PTFE O-Ring for Hydraulic Cylinder Seals
Polytetrafluoroethylene (PTFE) O-ring providing low-friction sealing in hydraulic cylinders for heavy machinery. Falls under HTS 3926.90.4510 as a plastic seal from polymers of heading 3901-3914. Ideal for high-pressure, non-lubricated applications.