O-Rings are circular seals commonly used in mechanical applications to prevent the leakage of fluids or gases. These versatile components can be made from various materials and custom-made for a specific purpose. The size and shape of O-Rings can vary greatly depending on their intended use, from tiny seals under the caps of bottles to large rings found in industrial machinery. Find out how Allied Metrics can solve your O-Ring problems. Request a Quote today.

What are O-Rings, and what do they do

O-Rings are essential in ensuring systems operate smoothly and without leaks. They provide a cost-effective solution for sealing connections and preventing costly damage when properly installed. O-Rings play a crucial role in various industries and equipment.

The flexibility of O-rings allows them to adapt to different surfaces and shapes, creating an effective seal even in dynamic environments where surfaces may move or change shape. O-rings can also handle high pressure and temperatures, making them suitable for household appliances and aerospace equipment use.

Whether fixing a leaky faucet or assembling spacecraft components, O-rings are necessary for creating a reliable seal.

Allied Metric Custom-Made O-Rings

At Allied Metrics, we specialize in custom seals and O-Rings. We can create standard or non-standard seal profiles to your specifications using our advanced machining technology. Our capabilities also allow us to handle jobs of all sizes, from small short runs to large long runs and even single pieces for emergency repairs.

We also offer custom O-rings for a variety of applications. So whether you need one custom piece or hundreds, our team is ready to provide reliable and real-time solutions.

Types of Allied Metric Custom-Made O-Ring Materials

While most O-rings are manufactured to fit standard sizes, custom-made O-rings can be made for unique and specific uses. To endure the friction and pressure of moving parts, dynamic seals, in particular, may necessitate unique O-ring designs.

The material and size of the O-ring will also vary depending on the specific function and operating environment. As a vital component in myriad machinery, choosing the right custom O-ring is essential for optimal performance.

In the long run, investing in a custom O-ring can save time and money by preventing equipment breakdowns and avoiding costly repairs. Whether static or dynamic, custom-designed O-rings from Allied Metrics offer an effective solution for any specialized sealing needs.

These materials include:

  • PTFE, or polytetrafluoroethylene, is known for its chemical resistance and high temperatures.

  • Viton, also known as fluor elastomer, has excellent chemical resistance and can handle extreme temperatures. Viton is among the most common forms of O-Ring and has many applications.

  • Buna, or nitrile rubber, is another popular option for its durability and resistance to oils and solvents.

  • EPDM, or ethylene propylene diene monomer, provides good insulation properties and weather resistance.

  • Silicone has a similar heat resistance and also offers flexibility.

  • Flourosilicone combines the heat resistance of PTFE with the flexibility of silicone.

With so many options available, custom-made O-Rings can be tailored to meet the specific needs of any project.

Similarities and differences between Standard O-Ring and a Custom Made O-Ring

Standard O-rings are typically made of elastomeric materials, and their primary function is to create a seal between two surfaces. On the other hand, custom-made O-rings can be made from various materials and colors depending on the application.


  • O-Rings are standard in many industries, from plumbing to automotive and aerospace.

  • Both standard O-Rings and custom O-Rings have circular shapes allowing them to fit into grooves and create a seal.

  • Both are available in various sizes and materials made from multiple types of rubber and can withstand different levels of pressure, temperature, and chemical exposure.


  • O-rings are typically made from elastomeric materials, while custom O-rings can be made from various materials.

  • Custom O-rings can also be made to specific sizes, colors, and dimensions, whereas standard O-rings come in various industry standard sizes.

  • Standard O-rings are mass-produced and may be an approximate fit for some applications, while custom O-rings are applicable to meet a project’s specific needs.

  • Custom O-rings may also be made from materials that can withstand higher temperatures, pressures, or chemical exposures than standard O-rings.

Benefits of using a Custom-Made O-Ring

There are many benefits to using custom-made O-rings, including:

  • Manufactured from various materials to fulfill a project’s requirements.

  • They can be made to specific sizes, colors, and dimensions, ensuring an exact fit.

  • They are made from materials that can withstand higher temperatures, pressures, or chemical exposures than standard O-rings.

  • Custom-made O-rings can be cost-effective for sealing applications requiring higher performance levels.

Applications of Custom-Made O-Rings

Custom-made O-rings are frequently utilized in high-performance applications, such as:

  • Automotive
  • Aerospace
  • Plumbing
  • Oil and gas
  • Chemical processing
  • Food and beverage processing
  • Medical devices

Custom-made O-rings can also be used in applications where a standard O-ring is not an exact fit or requires higher performance levels.

How to choose the right Custom Made O-Ring for your project?

There are several factors to consider when choosing the custom-made O-ring for your project.

  • Consider the size and dimensions of the O-ring

  • The material will be made from, and the level of performance required.

  • The environment in which the O-ring will be used.

The material used to make the O-ring must be compatible with the surfaces it will seal and the chemicals to which it will be exposed and the material used to make the O-ring will be determined by the level of performance required.

How to Order Custom-Made O-Rings

At Allied Metrics, we are proud to offer our customers unparalleled levels of customization for their o-ring needs. We understand the importance of having the right size, color, and material needed for your specific application. That is why we do not charge tool fees on orders of nearly any size.

Our range of customizations includes options in terms of both durometer and color, as well as medical-grade materials such as USP Class VI and FDA-approved materials. We also provide detectable metal o-rings and explosive decompression-resistant ones for safety purposes.

Furthermore, we can customize our o-rings according to customer needs related to high-temperature or high-pressure applications through special coatings. Such coatings include PTFE for internal or surface treatments and other specialized coatings for specific chemical resistance needs. Allied Metrics can provide our customers with precisely the product they need for their application by offering these customization services.

For ultimate satisfaction and customer convenience, we are proud to offer a wide range of customizations, from size and color variations to high-level protective coatings that make our o-rings perfect for even the most complex applications. With Allied Metrics, you can rest assured that your o-ring needs will be met with precision and professionalism.

Request a Quote!

We are the company for you if you need custom seals and O-Rings. Our advanced machining technology allows us to create standard or non-standard seal profiles to your specifications, meaning we can handle jobs of all sizes.

We also have extensive experience in the industry, so you can be sure that we will deliver a high-quality product in real-time. Contact us today to discuss your specific needs and give you a quote – we would be happy to help!