O-Ring Size Chart Parker A Comprehensive Guide for All Your Sealing Needs

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O-rings are circular sealing elements usually made of elastomers such as nitrile rubber, silicone, or fluorocarbon.

O-rings are ubiquitous sealing devices used in various industries, from automotive to aerospace, to ensure leak-proof connections and prevent the loss of fluids or gases. These small but mighty rings play a crucial role in maintaining the integrity of countless systems and applications. To select the right o-ring size for your specific needs, it is essential to have access to a reliable and comprehensive o-ring size chart. We present the O-Ring Size Chart Parker, which is widely regarded as a go-to resource for o-ring sizing requirements. Let's delve into the world of o-ring sizes and discover how this chart can assist you.

Understanding O-Rings and Their Importance:

O-rings are circular sealing elements usually made of elastomers such as nitrile rubber, silicone, or fluorocarbon. These rings are designed to fit into a groove or housing to create a tight seal between two or more mating surfaces. Their ability to resist pressure, temperature, and various chemicals makes them highly versatile and suitable for diverse applications.

The importance of selecting the right o-ring size cannot be overstated. An o-ring that is too small may not create an adequate seal, leading to leaks and system failures. On the other hand, an o-ring that is too large might not fit properly into the groove, compromising the sealing integrity. Therefore, having access to a reliable size chart is paramount for ensuring optimal performance and preventing costly errors.

The O-Ring Size Chart Parker:

Parker Hannifin Corporation, a leading provider of motion and control technologies, offers an extensive range of sealing solutions, including o-rings. Their O-Ring Size Chart and Parker is a comprehensive reference tool that provides precise measurements and dimensions for o-rings across various series and materials. This chart serves as a valuable resource for engineers, maintenance professionals, and anyone involved in o-ring selection and installation.

Navigating the O-Ring Size Chart Parker:

The O-Ring Size Chart Parker is organized in a user-friendly manner, allowing easy navigation and quick access to the desired information. Let's explore the key elements of this chart.

  • Series

The chart is divided into different series, each denoting a specific range of o-ring sizes. The series are typically categorized based on the cross-sectional diameter and the inside diameter of the O-ring. Common series include AS568, ISO 3601, and JIS B2401, among others. Selecting the appropriate series is the first step towards finding the right O-ring size.

  • Inside Diameter (ID)

Within each series, the O-Ring Size Charts Parker provides a detailed list of inside diameters (ID). The inside diameter is the measurement of the ring’s inner circumference when it is not under any compression. This dimension is critical for determining the compatibility between the o-ring and the mating surfaces.

  • Cross-Sectional Diameter (CS)

Alongside the inside diameter, the chart also lists the cross-sectional diameter (CS) for each size. The cross-sectional diameter represents the thickness or height of the o-ring when it is not compressed. This measurement helps ensure a proper fit within the groove or housing.

  • Dash Numbers

The O-Ring Size Chart Parker further utilizes dash numbers to precisely identify o-ring sizes within each series. These dash numbers serve as a standardized reference system, making it easier to communicate and order the required o-rings accurately.

  • Material Compatibility

Apart from size specifications, the chart also provides information about material compatibility. O-rings are available in various elastomers, and the choice of material depends on the application requirements and the substances the o-ring will come into contact with. The O-Ring Size Charts Parker specifies the recommended materials for each o-ring size, ensuring the selection of the most suitable material for your specific needs.

Benefits of Using the O-Ring Size Chart Parker:

Employing the O-Ring Size Chart Parker offers numerous advantages for anyone involved in the o-ring selection process. Here are some notable benefits:

  • Accuracy and Precision

Parker Hannifin is renowned for its commitment to quality and precision. The O-Ring Size Chart Parker reflects this dedication by providing accurate measurements and dimensions for each o-ring size. This precision is crucial in industries where even the smallest deviation can have significant consequences.

  • Time and Cost Savings

By utilizing the comprehensive size chart, engineers and maintenance professionals can save valuable time in the selection process. The chart allows for quick and efficient identification of the required o-ring size, eliminating the need for trial and error or extensive research. Additionally, selecting the right size on the first attempt minimizes the risk of costly rework or system failures.

  • Access to a Wide Range of Sizes

The O-Ring Size Chart and Parker encompasses a vast range of sizes, covering multiple series and materials. This extensive selection ensures that professionals from various industries can find the precise o-ring size they need, regardless of the application or operating conditions.

  • Material Compatibility Guidance

Choosing the appropriate material for an o-ring is crucial to its performance and longevity. The O-Ring Size Chart Parker provides valuable guidance on material compatibility, ensuring that the selected o-ring is resistant to the specific chemicals, temperature ranges, and environmental factors it will encounter.


Selecting the correct o-ring size is paramount for achieving reliable sealing and preventing leaks in a wide range of applications. The Parker O-Ring Size Chart and, offered by Parker Hannifin Corporation, is a trusted and comprehensive resource that provides accurate measurements and dimensions for o-rings across different series and materials. By utilizing this chart, professionals can ensure accuracy, save time and costs, and access a wide range of o-ring sizes. Whether you are an engineer, maintenance professional, or simply someone involved in o-ring selection and installation, the O-Ring Size Charts Parker is an invaluable tool that simplifies the process and enhances overall performance.