A SAE O-ring is a type of seal that meets the standards established by the Society of Automotive Engineers. SAE O-rings are available in a variety of sizes and materials, including Buna-N, Viton, silicone, and EPDM. Each material has different properties that make it suitable for different applications. For example, Buna-N is a general-purpose material that is resistant to oil and gasoline, while Viton is more resistant to high temperatures and chemicals.

The shape of the SAE O-ring is designed to provide a secure and tight seal. The O-ring has a circular cross-section, which allows it to compress evenly when it is compressed between the two mating surfaces. The O-ring also has a specific width and thickness, which are designed to fit into a specific groove or recess in the mating component.

SAE O-rings are used in a wide range of applications, including automotive engines, hydraulic and pneumatic systems, and industrial equipment. They are used to seal fluids and gases in a variety of components, such as pumps, valves, and cylinders.

One of the advantages of SAE O-rings is their simplicity and reliability. They are relatively inexpensive and easy to install, and they provide a consistent and reliable seal. However, they are not suitable for all applications, and they may not be effective in extreme temperatures or harsh chemical environments.