At Marco Rubber, we believe in getting you the solutions you need - fast. Our On-Time In-Full (OTIF) promise guarantees we'll ship any in-stock orders within 24 hours. We keep all standard-size o-rings and materials on hand, so you can get what you need fast.

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Our o-ring design guides offer technical selection and design information based on industry and application uses to help learn the best fit for your sealing application. Custom o-rings are typically available with no tooling fees and rush delivery options.

Popular o-ring size standards include USA's AS568 o-ring size chart, the UK's BS 1806 o-ring sizing chart, and Japan's JIS B 2401 o-ring size list. Metric o-rings and custom size o-rings are often used when a standard o-ring size will not fit an application or existing hardware.

View basic o-ring design guides for grooves, glands, depth, width, clearance, stretch, squeeze and more from Marco Rubber O-Ring specialists and buy online

Marco offers any O-ring size with no tooling charges, we also offer X-rings also called Quad-Ring® Seals for dynamic applications in any material, and many of the popular semiconductor O-ring sizes are already tooled.

Marco Rubber & Plastics offers the most diverse material options in the market. We supply o-rings and seals in any size, material, durometer and performance requirements.

With one of the strongest seals of any material, Viton® O-Rings are key in industries where reliability is non-negotiable–including automotive, chemical processing, fuel and oil, and aerospace. Marco Rubber stocks all USA standard Viton® O-Rings sizes and thousands of metric and non-standard sizes.

USA AS568 o-ring standard sizes are the most commonly used o-ring sizes in the world. Refer to our standard o-ring size chart to find USA AS568 o-ring dimensions. Order o-rings online from the world’s largest inventory network including custom o-rings typically without tooling fees.