Standard O-Rings

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Standard ORings
O-Ring Size Chart

Rocket Seals, Inc. can provide a range of standard o-rings. We carry a variety of standard o-ring sizes and colors. Contact us today to learn more.

O-Ring Specifications 

Our extensive inventory of standard O-Rings includes:

  • Wide range of sizes, IDs and ODs
  • Buna, FKM, EPR, Silicone, PTFE, PTFE encapsulated, PTFE coated, Kalrez, Neoprene, Chemraz, Simriz, Highly Saturated Nitrile, Urethane, Mil-spec, and many specialty compounds
  • Quantities from small orders to large production, quantity orders
  • Custom kitting, assemblies, and splicing kits

Standard O Rings Colors

Special order O-rings and seals in different colors are increasingly popular with OEMs for parts identification and are priceless if assembly or repair mistakes are avoided.  Please call Rocket for specific information (lead times, minimums) about both custom colors and stock colors for your production or private labeled repair kits.

We have experience and expertise in all industries, including,

Standard O rings for OEM & MRO Markets

We serve the OEM and MRO markets, providing facilities and maintenance managers with replacement and wear parts, providing custom or standard O-Rings for existing product production and new product development. Our expert team can recommend and source the right O-Ring for your application.

O-Rings provide seals between two or more parts in equipment, machinery, and motors. They are used to prevent leakage of liquids or gasses and to provide protection against compression or wear in moving parts.

We offer same-day shipping from many parts and perform quality checks of every order, so you know that your critical parts will meet your application specifications.

We can provide O-Rings with material and manufacturing processes certifications to industry standards if required for your application. If your application requires unique or hard-to-find sizes, shapes, or materials, we will work with our manufacturing partners to source the O-Rings you need. At Rocket Seals, our commitment to the highest standard of customer service includes technical support to assist you in selecting the O-Ring that will meet your application requirements.

Rocket Seals is a leading seal and O-Rings specialist, supplying standard O-Rings for all industrial applications.  For over 60 years, we have serviced the growing and changing needs of industry, sourcing from leading manufacturers to update and expand our inventory to provide O-Rings that meet your latest requirements.  We partner with our customers – providing you with technical expertise and superior service to ensure that your purchases meet or exceed your expectations.  Rocket Seals is a full-line stocking distributor serving the OEM and MRO markets.  We take pride in our same-day shipping, and our ability to provide the right part, on-time and as promised.


AS568 O-Ring Size Chart

Series C/S In. C/S Frac. C/S mm ID Range


1/16 1.78 .029-5.239"
100 0.103 3/32 2.62 .049-9.737"
200 0.139 1/8 3.53 .171-17.955"
300 0.21 3/16 5.33 .412-25.940"


1/4 6.99 1.35-25.940"
500 Varies Varies 1.42-3.0 .185-2.337"


Contact Rocket Seals today to see how we can solve your OEM and MRO challenges.



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