Image showing various sizes of O-Rings

An O-Ring is a widely used sealing ring with a circular cross-section designed to fit in a groove. O-Rings are a very popular choice of sealing due to their simple form, low​ cost, reliability and minimal space requirements in the application.

We carry extensive stock of O-Rings in NBR, HNBR, FKM (Viton®), FFKM, EPDM, Silicone, Chloroprene and Aflas® as well as special materials and grades for demanding applications in the Petrochemical, Gas, Water and Food industries to name but a few. Our standard stocked sizes comply with the following specifications:

  • British Imperial (BS1806) and Metric (BS4518)
  • German (DIN 3771)
  • AS568
  • SAE AS568
  • ISO3601 

We can supply various ​elastomers to International and National Regulations suitable for Water, Food and Gas.

  • Water: KIWA, WRC-ACS, WRAS, NSF/ANSI 61-2007a, DVGW, KTW, UNI EN 681-1, UNI EN 682-3, UNI EN 682-4
  • Food: FDA, CFR 21.177.2600, USP CLASS 6, EFSA
  • Gas: EN 549, UNI EN 682-2
  • Flammability & Ignition: UL 746A, UL 94 HB
  • Oil & Gas: Norsok​ 
  • Excellent thermal and chemical properties

The Ashton Seals O-Ring Brochure is also available for download in our Literature Section

Viton® is a registered trademark of DuPont Dow Elastomers. If you require genuine DuPont Viton® please specify this to our sales team.

AFLAS® is a registered trademark of Asahi Glass Co. Ltd