ISO Center O-Ring with SpacerISO Center O-Ring with Spacer

ISO Center O-Ring with Spacer

The ISO centering rings are made of 304 stainless steel with durable Viton® rubber O-rings and are used to seal both ISO-K and ISO-F vacuum flanges.  These vacuum fittings are made with inner and outer rings of 304 Stainless Steel with FKM rubber O-ring material.

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Quality you can see


We provide best-in-class engineered precision vacuum chambers and exceptional customer service.


Our factory follows strict quality control procedures and is supported by experienced mechanical and design engineers, machinists, welders, and assembly personnel.

Customer Support

Need some help getting your product set up? We’ll be there. We also provide ongoing support.