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Flat O-Rings Manufacturers and Suppliers

IQS Directory provides an extensive list of flat o-ring manufacturers and suppliers. Utilize our website to review and source flat o-ring manufactures with our easy-to-use features which allow you to locate flat o-ring companies that will design, engineer, and manufacture flat o-rings for your exact specifications. Our request for quote forms make it easy to connect with leading flat o-ring manufacturers. View company profiles, website links, locations, phone number, product videos, customer reviews, product specific news articles and other production information. We are a leading manufacturer directory who will connect you with the right manufacturers whether you are looking for flat o-ring seals, flat rubber o-rings, or round flat o-rings.

  • 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. Viton® o-rings & o-ring kits are supplied by Arizona Sealing Devices, making us the source of seals, die cutting, oil seals, packings, sheeting, vee rings, etc.

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  • 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. Our company is ISO 9001:2015 certified. Call/visit our website for more information about our products & services!

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  • Arlington, TX 817-640-1193

    Texas Seal Supply Co., Inc. is a franchised distributor for Parker Seal Co., a division of Parker Hannifin Corporation. It has served the military, commercial, aerospace and the oil field industry nationwide since 1971. We have an inventory of military and industrial seals (O-rings, back-ups, hydraulic seals, thred-seals, stat-o-seals and all types of packing seals for hydraulic and pneumatics).

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  • Clarkston, WA 208-413-6377

    We manufacture a wide variety of o-rings for a number of industries including: food handling, irrigation, oil & gas, pool & spa, semiconductors, automotive, aviation, hydraulic, pneumatic, fluid power, chemical processing specialty OEM and much more. We make it easy to find the specific o-ring you are looking for and our experts will work with you every step of the way.

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  • 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. Our products can be from our stock inventory or custom made to fit your specific application. We look forward to working with you and finding solutions to your sealing needs. Visit our website today!

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  • More Flat O-Rings Companies

businessIndustry Information

Flat O-Rings

Flat o-rings are sealing rings that feature rectangular or square profiles, also called torus shapes, as opposed to o-rings, whose profiles are round. Flat o-rings function similarly to o-rings in that they are used for gasket and high-pressure sealing applications, and can even fit in the same gland. There are some spaces that are not round, or are not suitable for round o-rings to seal. Therefore, flat o-rings are designed the way they are so they adequately seal spaces that are similarly shaped. Flat o-rings can also be referred to as square or lathe cut rings.

Once placed between two parts of a machine’s body during assembly, flat o-rings serve as a sealing mechanism. However, unlike their other o-ring counterparts, flat o-rings do not require as much pressure or squeezing for them to function properly. They can also be easily removed when it is time to replace them, which significantly minimizes maintenance down time. In addition, they require less friction, leading to reduced wear and tear and eliminating the necessity for lubrication. These characteristics enable flat o-rings to last much longer and cost less, especially in applications where abrasion is a main concern. Since flat o-rings feature corners, they can be used in addition to round o-rings to cover places that the round o-ring cannot reach. For example, flat o-rings can be used as a seal between the oil filter and oil housing of a car, as a flat o-ring has a larger surface area and provides more coverage when screwed in place. Aside from these specific cases, flat o-rings and round o-rings can be used interchangeably for most other applications.

Although flat o-rings work the same way as other types of o-rings, there are certain applications and pieces of equipment where flat o-rings are especially recommended for, such as rotary sealing. Other examples include hydraulic and pneumatic pieces of equipment. Examples of industries that use flat o-rings extensively include jewelry manufacturers and suppliers, water treatment facilities, chemical processing, oil refineries, and aerospace.

Flat o-rings that feature square or rectangular cross sections are fabricated by being cut out of extruded tubes, or by way of extrusion out of a square-shaped mold. Curing processes such as trimming or knife cutting give flat o-rings their distinctive shape. The curing process involves adding chemicals to the raw material while still in its molten state in order to alter the chemical properties of the final product. The cutting and trimming processes are carried out by machines that are equipped with distinctly-shaped blades that are used to create exact duplicates of a product. This process is also known as die cutting.

Flat o-rings are made from thermoplastic materials and elastomeric rubbers, such as Teflon, Viton, and silicone. Flat o-rings have s four-lobed design, which doubles their sealing surface compared to regular o-rings. They also have a smooth surface texture, thermal conductivity, tensile strength, a broad range of tolerable temperature, and an ability to seal under high pressures. However, they require an additional step in the fabrication process, as opposed to other types of o-rings, which simply undergo molding. Therefore, flat o-rings are not as easily found as other styles.

O-rings are a highly versatile component. They can function as a screw support, as a cushion, as a leak barrier, and many other applications. Whether it is flat or round, there are numerous uses for o-rings. One particular industry for which flat o-rings are used in the fishing industry, where they are used to stabilize bait. The o-ring is slid around the bait, and the hook is hooked through the o-ring, as opposed to the alternative method where the bait itself goes through the hook. If live bait is held by an o-ring, it stays alive, making it more likely to attract fish. Depending on the ring’s size, they can hold live bugs, live worms, or pieces of meat. In addition, the use of a flat o-ring minimizes the likelihood of the fish catching the bait and escaping the hook. Fishers can benefit from this method because they do not have to replace bait as often.

Manufacturers of o-rings recommend flexible rings made from flexible plastic or rubber for fishing applications. Non flexible flat o-rings are much more likely to break during fishing. Polyurethane, latex rubber, and silicone are ideal for fishing applications because they are non-toxic, and thus will not contaminate the fish’s body with toxins. Because flat o-rings can play such an important role in fishing, there are some manufacturing companies that make o-rings especially for this purpose. O-ring suppliers and manufacturers will work with you to find the best o-rings suitable for fishing.

More Flat O-Rings


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Flat O-Rings – Arizona Sealing Devices, Inc.
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Flat O-Rings Informational Video