Rubber O-Rings

Choose exactly what you need from the Cock-a-Hoops selection of rubber o-rings.  

    • Made from quality, basic black Buna-N rubber
    • Flexible, but not stretchy, they have just a bit of give.
    • All rings have the same thickness - about 5 mm (.21 inches)
    • Available in your choice of 27 different sizes based on the inside diameter, from 7/16 inch (11mm) up to 2-3/4 inch (70mm) *
    • All sizes are "nominal", meaning that the actual inside diameter may be a tiny fraction less than the stated size.

       Choose the size(s) you need from the drop down box below the item title at page top. You will see that each ring has both standard and metric sizing. 

      * Rings are sold individually. You may also choose from ring sets (a set consists of several select rings, one of each size) at a considerable cost savings to you.

Questions and answers about this item

Q: Are the rubber rings heat proof
A: As heat proof as Nitrile Rubber (Buna-N). High temp range is 210 to 250 F. For more complete stats, check out this pdf: https://www.robinsonrubber.com/pdfs/NitrileRubber.pdf 

Cock-a-Hoops is your ring headquarters!  For more rings be sure to visit the  Cock-a-Hoops Ring Page.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Payment:    For details, please check the shipping and payments section.

Shipping:   FREE in the U.S., along with FREE delivery confirmation. I ship fast, and your satisfaction is fully guaranteed. Other shipping options, if any, are detailed in the shipping and payments section.

Terms for International Buyers: Check the shipping and payments section for details about shipping to your country. Please note that USPS International First Class Mail does NOT include tracking. Delivery time and quality of delivery service can vary greatly, depending on the country and destination. We are responsible for properly addressing and shipping your parcel, but can not be held responsible in case of loss, theft, delay or non-delivery. If you want your package shipped by USPS Priority Mail International or USPS Express Mail International (both of which include ordinary indemnity insurance) check the shipping and payments section for availability, or contact us for details. Additionally, you are responsible for any duties, taxes or fees levied by the authorities in your country. Contact us first if you have any questions about this policy. Otherwise your purchase of this item seals your agreement with these terms.