High-Quality O-Rings for All Industries

Standard, JIS, and Metric O-Rings

NCS carries and stocks a variety of O-rings including standard AS568A, Japanese (JIS), and metric options. Our O-rings can be produced in a wide range of materials to meet your needs, from rubber and neoprene to silicone and PTFE.  We also provide encapsulated O-rings for durability and corrosion protection, and large O-rings that are designed to perform at any size you need. 

Other O-ring products we carry include:

  • Back-up O-Rings
  • Square Rings
  • Viton® O-Rings
  • Quad-Rings®  

North Coast Seal Sources Your Metric Project Needs

Full Range of Metric O-Rings for All Product Types

Our NorthCo Metrics division can identify and source virtually all of your metric product needs from our expansive selection of materials. Our O-ring products are also available in JIS and standard options, including AS568 O-rings.  Whether you need heavy-duty O-ring seals or v-packings for the forging and steel industry or rod and piston seals for fluid power applications, we can meet your needs. NCS also offers clients NSF 51 and 61-compliant O-rings for food equipment manufacturing. Contact us today for more information or to tell us about your O-ring needs.


High-Quality Material Options for O-Rings

✔ Buna-N (Nitrile)
✔ Viton®∆ (Fluorocarbon)
✔ Silicone
✔ EPDM (Ethylene Propylene)
✔ Chemraz®§
✔ Kalrez®*
✔ Simriz®†
✔ Teflon® (PTFE)
✔ Neoprene*
✔ Natural Rubber
✔ Hydrogenated Nitrile Rubber (HNBR)
✔ Aflas®‡
✔ Carboxylated Nitrile
✔ Hypalon® *
✔ Santoprene
✔ Geolast® (Advanced Elastomer System)
✔ Polyurethane
✔ Rubber Urethane

* DuPont Performance Elastomers | § Product of Green Tweed

† Product of Simrit | ‡ Product of ACG Chemicals | ∆ Product of Chemours Company


✔ Aluminum
✔ Silver
✔ Copper
✔ Soft Iron
✔ Mild Steels
✔ Annealed Nickel
✔ Nickel
✔ Monel
✔ Tantalum
✔ Stainless Steel
✔ Inconel
✔ Titanium

Square Rings

Rubber Rings for Static Applications

o-ring dimensions

Square rings and rubber washers are able to be used in static applications where high sealing force is required or when the sealing area is too thin to accommodate any other seal.

Rubber square rings are available in all materials and durometers, however the most readily available is an NBR Buna N-70 Duro O-ring, which is used for general purposes and comes in USA standard sizes.

Compression Molded Large O-Rings

North Coast Seal Provides Dimensions Without Limits

One cross-section and one production line means O-ring dimensions without limits for our clients’ sealing needs. There is no need to worry about the sizes of molds and presses. Our new production system uses the latest technology available to output large O-rings in any dimension you need and with the highest mechanical properties.

Trust Your O-Ring Needs With NCS

Tell Us About Your Next Project

Our expert team is ready to help you identify the right O-rings for your next project from our wide selection of sizes and materials. Reach out today to talk to us about your needs and find a high-quality and high-performing sealing solution from NCS.

Get in Touch with Us

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