O-rings are simple, cost-effective seals that prevent leaks between static or moving parts in countless industrial and automotive applications. 3BG Supply stocks o-rings and o ring kits in a range of materials and sizes, all part of our broader seals category. Properly sized o-rings keep hydraulic and pneumatic components on conveyor systems and other equipment running leak-free.
Find the right O Ring for your needs.
FAQs
What is an O-ring?
An O-ring is a donut-shaped gasket, usually made of rubber or another elastomer, that seals the gap between two joined parts. It's compressed into a groove between the components to block the passage of fluid or gas, making it one of the most widely used sealing solutions in industrial equipment.
How do I measure O-rings?
To measure o-rings, check the inside diameter, the cross-sectional diameter, and the material type. Measuring across the inside of the ring, not the outside, gives the most accurate inside diameter reading, which is the key spec for finding a correct replacement.
What are O-rings used for?
O-rings are used to seal static and dynamic connections in hydraulic systems, pneumatic equipment, pumps, valves, and automotive components. They're available individually or in an o ring kit with assorted sizes and materials for general maintenance use.
How do you shrink an O-ring that's too large?
Some technicians use heat or specific solvents to slightly shrink an o-ring temporarily for installation, but this isn't a reliable long-term fix. For a proper, lasting seal, it's best to order an o-ring sized correctly for your application rather than trying to shrink an oversized one.
What's the difference between an O-ring kit and individual O-rings?
An automotive o ring kit bundles multiple sizes and materials together for general repair work, while individual o-rings let you order the exact size and compound needed for a specific application. Kits are convenient for shops; single o-rings are typically more economical for production use.
Industrial O Ring Manufacturers
