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Rubber O-Rings

A reliable source for Rubber O-Rings information and leading Rubber O-Rings Companies & Manufacturers.

A rubber O-ring is a mechanical gasket manufactured in the shape of a donut or a torus. It is used for static and dynamic uses where there is potential friction and relative motion between parts. They are usually made from different types of rubber, such as nitrile, silicon, Viton, and other rare synthetic rubber materials. Read More…

Rubber O-Rings In general, rubber O-Rings are not made of natural rubber but of a variety of synthetic rubbers also known as elastomers.
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Leading Manufacturers

Chandler, AZ  |  480-892-7325

Since 1989, we have been an o-ring distributor. We offer commercial, FDA, military, metric o-rings, caps, plugs, gaskets & more. Custom, rubber o-rings, metal o-rings, diaphragms, face seals and non-standard o-rings are also offered.

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Arizona Sealing Devices, Inc. $$$

Sparta, NJ  |  973-383-2487

A leading o-ring manufacturer of quality metric seals for industries worldwide, defines Allied Metrics Seals & Fasteners. We offer FDA-approved elastomers, Teflon® seals, o-rings & much more. Choose from o-ring sizes, metal & plastic o-rings, o-ring kits, o-ring seals, silicone o-rings, EPDM o-rings, static o-rings, etc. Call/visit our website for more information about our products & services!

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Allied Metrics Seals & Fasteners, Inc. $$$

Lawrenceville, GA  |  877-432-4627

Since 1973, Daemar USA has been producing the best-quality hydraulic seals and o-rings on the market. We offer a wide variety of o-rings, including silicone, Teflon, EPDM, HSN-80, back-up, and Aflas o-rings. We also offer o-ring cord, quad rings, and o-ring packs. Our seal collection includes oil seals, axle seals, JM clipper seals, end caps, Teflon Energized seals, v-rings, and more. We are an ISO 9001 certified company, and we are eager to help you find the o-rings and seals that you need!

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Daemar USA $$$

Santa Fe Springs, CA  |  562-941-4800

RD Rubber Technology Corp is an ISO 9001:2015 / AS9100:2016 certified and ITAR registered company. We offer compression, transfer, injection and Liquid Injection molding, rubber to metal bonding, engineering support, tooling design, machining and more. Our customers rely on us to give them the best possible production o-rings. From aerospace to medical, food processing to military applications we build trust by being responsive to your needs.

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RD Rubber Technology Corporation $$$

Grand Rapids, MI  |  616-538-4970

Kent Rubber Supply has been a trusted supplier of o-rings since 1946. Focusing in exceeding customer service, we leverage the best equipment and the most knowledge staff to ensure we meet our customers unique needs. With our trusted experts, we determine the best rubber, foam, sponge or PVC material for your specific need. We continue serving customers both offshore and domestic.

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Kent Rubber Supply Co. $$$

Lancaster, NY  |  716-684-7600

Sealing Devices is a leading North American distributor & fabricator of o-rings, gaskets, seals, adhesives and EMI shielding for industrial, aerospace, medical and military applications.

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Sealing Devices Inc. $$$

Littleton, MA  |  800-882-3666

Atlantic Rubber, an o-ring manufacturer, can satisfy your needs for quality precision o-rings that meet ASTM, SAE, AMS, AS568, JIS, Metric or other specific requirements. Choose from static o-rings, metal o-rings, o-ring kits, plastic o-rings & more.

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Atlantic Rubber Company, Inc. $$$
placeholder image Arizona Sealing Devices, Inc. Allied Metrics Seals & Fasteners, Inc. Daemar USA RD Rubber Technology Corporation Kent Rubber Supply Co. Sealing Devices Inc. Atlantic Rubber Company, Inc.

How do Rubber O-Rings Work?

The O-ring is manufactured with other metallic hardware to fit the breadth of the assembly perfectly. The O-ring is fitted into the metal hardware's breadth and then compressed when the second piece is fitted into place. The compression ensures an airtight condition and facilitates full contact with the metal frame's inner and outer walls.

dark red rubber o ring

The natural resilience of the ring creates a perfect seal to stop any contents, liquid or gas, from slipping through the barrier. As the fluid exerts pressure on the O-ring, it is pushed against the wall on the low-pressure side, thereby increasing the seal's strength. When the pressure is released, the O-ring material will allow it to contract and return to its initial shape, thus maintaining the O-ring's seal and overall integrity.

Types of Rubber O-Rings

The different types of rubber O-rings include:

Square Rubber O-Rings

As the name states, square rubber O-rings have a square cross-section. Also known as lathe and washer cut rings, they are very flexible and used to make leak-proof connections. The square ring is seated in a groove, and as the two surfaces are pressed together, the ring conforms to the groove and forms a secure, permanent seal.

cross section of a rubber o rings

Hollow O-Rings

Hollow rubber rings have the same shape as regular O-rings and flow into a groove similarly when a force is applied. The difference is that hollow rubber rings easily compress and fill the grooves. Furthermore, they are unsuitable for dynamic and high-pressure applications, though they can still be used in standard and non-standard grooves.

hollow rubber o rings

Coated Rubber O-Rings

These rubber rings are coated to increase their resistance to friction, harsh weather conditions, chemicals, and abrasive actions. The coat also makes the rings non-sticky or bendy.

coated rubber o rings

Back-Up O-Rings

Back-up O-rings are usually meant to protect the seal of an O-ring from extrusion when put under extreme conditions. They lessen the space where the O-ring would protrude from and add additional support to the structure so that high temperatures and pressures are withstood.

back up rubber o rings

Encapsulated Rubber O-Rings

These rings have an inner core made of flexible rubber and covered with a layer that protects from corrosion and resistance to extreme conditions. The layer types usually include fluorinated ethylene propylene or perfluoro alkoxy-copolymer. These two polymers are used because they offer greater resistance to destructive chemicals and improved mechanical properties to resist stress and cracking. However, the encapsulated rubber rings are easily worn out by moving parts, limiting them to static applications where movement is minimal.

encapsulated rubber o rings

Applications of Rubber O-Rings

O-ring seals are used in high-pressure sealing jobs. O-ring rubbers are used in mechanisms where fluids are transmitted at very high pressures because they deform and fill up the grooves in the gasket, leaving little room for contents to sip out. High turbo engines also use rubber O-rings because of their resistance to very high temperatures and ability to retain hydro chemicals and solvent-based compounds. The plumbing industry also uses rubber O-rings as they provide waterproof sealing in water pipes.

Benefits of Rubber O-Rings

Rubber O-rings are widely used in multiple applications because they come in numerous sizes for varying pipe and joint sizes. They also come in varying hardness and textures to suit different applications. The rings also have a simple design, making them easy to use, and are self-seating as they do not require any tool adjustments. They are also cost-effective since they do not have complex requirements.

Rubber O-Rings Informational Video

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