Product overview

NCS carries a variety of O-rings from standard AS568A, JIS and Metric in stock in various compounds. We also carry Back Up Rings, Square Rings, Viton® O-Rings and Quad-Rings® in a variety of materials. 

More Information

Our NorthCo Metrics division can identify and source virtually all your metric product needs. We offer a variety of materials for all product types.

In addition, we offer a full range of metric O-rings in both standard and more exotic materials. We also offer large and heavy-duty seals and v-packings for the forging and steel industry.

NorthCo Metrics can also supply a full range of rod and piston seals for all fluid power applications. Contact us today for more information or to tell us about your o-ring needs!


✔ 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

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 for general purpose is a NBR Buna-N 70 Duro is USA standard sizes.

Compression Molded Large O-Rings

One cross section > One production line > Dimensions without limits!

No need to worry about the sizes of molds and presses! This new production system outputs large o-rings at any dimension you need and with the highest mechanical properties.

Get in Touch with Us

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