Home News A Guide to Ordering Parker O Rings

A Guide to Ordering Parker O Rings



If you’ve worked on a project where sealing was needed, chances are you’ve worked with an o-ring. They are the most commonly used seal in the world, made from a variety of materials across the size spectrum. Their popularity comes from being a cost-effective and efficient sealing method, in addition to their adaptability to any number of project uses.

Parker Hannifin is a leader in o-ring manufacturing, setting the industry standard for decades with o-rings seen across various industries, including aerospace, electrical, manufacturing, and more. So when an o-ring is needed for a project, looking to Parker products will ensure a project using the highest in quality product.

When deciding on which Parker o-ring is right for your project, there are a few key characteristics on which to focus, and a few key tools which will help you make these decisions. Parker knows this can be overwhelming and has developed tools to assist in focusing on what data is needed to make an informed decision, and connecting that data with the perfect fit in o-ring products.

Often, potential customers must refer to an o-ring size chart to both familiarize themselves with the breadth of o-ring sizes and to determine the best fit for their specific project. Even with existing knowledge of the o-ring products available, there is often no room for error when selecting the right size o-ring. To help eliminate potential errors and find the exact product needed, Parker has developed a breakthrough engineering tool, the Parker O-Ring Selector. This tool not only assists in finding the correct size o-ring to purchase, but also provides guidance for materials that offer the best fit with a selected size.

Working with both standard and imperial o-ring sizes, the Selector determines its selections based on criteria connected with the desired products. These include operating temperature, desired polymer group, and seal hardness. Need more detail? The tool also allows users to drill down to increasingly specific conditions by utilizing the tool that will filter results based on fluid compatibility, combing its more than 2,500 different available materials to find the perfect fit.

The tool’s Size Selector function provides an o-ring size chart, calculated by entering information about the hardware configuration of the desired o-ring design, including seal, piston/groove and bore. After entering this information, the o-ring dimensions that have been selected are displayed, and you are on your way to a perfect o-ring selection.

If a project calls for o-rings of varying sizes and materials, it can be difficult to keep them all in line and ensure that the correct product is used for the correct application. To help ease this area of project management, there is the Parker o-ring part numbering system in all product catalogs and online, where the individual products are identified by their polymers, compounds, and hardness.

What may benefit customers the most goes beyond the specialized tools and myriad of product options. It’s the ability to work with experts in o-ring selection who have the experience and quality of product unmatched in the industry, all working to provide the ultimate in customer satisfaction when looking to purchase o-rings.



Whatever your o-ring needs, we’re here to assist. Browse our extensive  array of o-ring capabilities, and feel free to reach out to our support unit for developing o-ring prototypes or questions regarding fulfillment and support for your manufacturing needs.


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