Back-up Rings for Oil & Gas Applications - Trelleborg
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8-437 FKM Back-up Ring [V890437] : The O-Ring Store LLC, We make getting O- Rings easy!
Global O-Ring and Seal, LLC - Requesting for backup? We have backup rings readily available in NBR, Viton, and Teflon (Solid, Split, and Spiral versions). Use our Backup Ring Size Chart here
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8. Parbak - Back up rings - O-Rings-Stock O-Ring Webshop