Flat O-Rings

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

They have high pressure sealing and gasket functions that both work the same as standard O-rings and are even able to fit into the same gland. Read More…

Flat O-Rings Flat O-rings, also called lathe cut and square rings, are sealing rings with square or rectangle profiles, called torus shapes, that are used as alternatives to the standard O-Ring shape.

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. 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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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. $$$

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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Texas Seal Supply Co., Inc. $$$

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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The O-ring Store, LLC $$$

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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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. We cut to length & vulcanize our molded o-rings for heavy duty static applications. Small to large orders in a full range of sizes & materials:

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Atlantic Rubber Company, Inc. $$$
placeholder image Arizona Sealing Devices, Inc. Allied Metrics Seals & Fasteners, Inc. Texas Seal Supply Co., Inc. The O-ring Store, LLC Sealing Devices Inc. Atlantic Rubber Company, Inc.

Flat O-rings work in the same fashion as other o-rings, although they do perform better in applications like rotary sealing. That is because their shape is specialized for certain shapes and applications. They are also often found in hydraulic and pneumatic machinery and equipment. The industries that utilize o-rings include aerospace, oil refineries, chemical processing and water treatment facilities, jewelry manufacturers and jewelry suppliers.

Flat o-rings work as seals when placed between two parts of a machine body while it is being assembled, just like clear o-rings. Unlike some o-ring brands, these square shaped o-rings require less squeezing and pressure to maintain an adequate seal, and therefore use less friction, cutting down on wear and tear. This results in an extended life, especially where abrasion from contacting surfaces is a common issue. Less friction also means flat o-rings do not require lubricants to protect them, which cuts down on upkeep costs as well.

O-rings that are flat or have square and rectangle cross sections are either extruded out of a square-shaped mold or cut from extruded tubes. They obtain their unique shape by curing processes and knife cutting or trimming. Curing involves changing the chemical body of an object with an addition of foreign chemicals into the melted form of the plastic used to construct the o-ring.

Cutting and trimming are done with machines equipped with specially shaped blades to cut the exact design of a flat o-ring numerous times, which is also known as die cutting. Flat o-rings are manufactured from all the same elastomeric rubber and thermoplastic materials as round o-rings, like silicone, Teflon and Viton. However, the four-lobed design of flat o-rings provides twice the sealing surface of regular O-rings.

Flat O-rings keep their smooth surface texture, tensile strength, thermal conductivity, wide temperature range and sealing ability under high pressure, but they are less common because of the uncommon manufacturing process that requires an additional step. Most other styles of O-rings simply require the molding process.

Flat O-Rings Informational Video