Usit-Rings For the maximum service life in your application
UR26.7-35-2 USIT-RING 26,7x35x2 NBR
Usit-Ring NBR für M 4 5,7x9x1 mm
Usit-Ring – Wikipedia
Source Bonded Washer NBR/Steel usit ring seal Rubber product seal on m.alibaba.com
Innendichtend Freudenberg Sealing Technologies - ref. USIT I 22,50 X 28 X 1,50 72 NBR 99041 - RUBIX Deutschland
Pfeiffer Vacuum Bonded Seals USIT-ring P 3529 133 A (5pk) for Manual Vent Valve is designed to be used with the following vacuum pumps: TMH 071 TMU 071 TMH 261 TMU 261
File:Selbstdichtenden Unterlegscheibe Usit Ring Schnitt.svg - Wikimedia Commons