O-Rings: Seals for Fuel, Oil & Coolant Systems

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O-Rings

O-rings are fundamental sealing components in virtually every automotive fluid system, from fuel and oil to coolant and air conditioning. This collection covers a wide selection of sizes and materials designed to match common automotive demands, whether you are rebuilding a fuel injector, resealing a thermostat housing, or restoring an air conditioning line. Choosing the right O-ring means matching the material to the fluid and temperature environment, and getting the exact cross-section and inner diameter for a leak-free fit.

Available in popular materials including Nitrile (Buna-N), Viton (FKM), and silicone, each suited to different temperature and chemical resistance needs
Standard and metric sizing to cover import and domestic applications
Used across engine, transmission, HVAC, and hydraulic systems
Look for durometer hardness and temperature range to match your application requirements

When selecting an O-ring from this collection, verify the required cross-section thickness (e.g., 1.5mm, 3mm) and inner diameter, and confirm the material is compatible with the fluid it will contact. For dynamic applications, consider a harder durometer; for static seals, a softer compound often works best. Always replace O-rings whenever a component is disassembled to ensure a reliable seal.

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O-Rings

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