
O-Rings
O-rings are known for their effectiveness, affordability and reliability. We specialise in providing both standard and customised sealing solutions that meet all types of requirements, whether they are for static or dynamic purposes.
Types of O-Rings
We offer a wide range of seals in various materials and sizes:
- Nitrile o-rings
- Viton™ o-rings
- EPDM o-rings
- Kalrez® o-rings
- FFKM o-rings
- HNBR o-rings
- PTFE o-rings
We keep stock of over 80,000 o-rings across 10,000 individual sizes to suit both large and small enquiries.
O-Ring Dimensions
Our O‑rings come in a wide range of dimensions to suit everything from tiny precision instruments to heavy‑duty industrial equipment. We supply both imperial and metric sizes, to help ensure compatibility across global applications.
What Size and Material do I Need for my O-Ring?
If you cannot see the information you need in our o-ring catalogue or in the size and tolerance file, please feel free to contact our technical team, who will be able to advise.
How to Order O-Rings?
Please contact our sales team using the 'Request a Quote' form above.
How Long will it Take to Receive my O-Rings?
For stock items, we will ship them same day for next day delivery. For non-stock items, we are committed to obtaining them promptly, ensuring the shortest possible lead times.
Stock Agreements
If your company has a regular need for a certain quantity of seals, you can enter into a stock agreement with M Seals. This ensures that a minimum stock is always available, providing you with supply security for critical productions or urgent tasks.
Custom O-Rings
In addition to our standard seals, we specialise in custom manufactured sealing solutions, designed to meet unique requirements with specific dimensions, including spring energised seals and other advanced solutions that are ideal for complex applications. We develop innovative sealing solutions that ensure optimal performance and reliability in any situation.
M Seals is equipped with CNC machines in-house, allowing for the bespoke design and rapid production of customised seals. We provide same-day dispatch for our engineered seals as well as all stock items, guaranteeing that each product meets rigorous quality standards and arrives on time.
Any questions or enquiries?

