After the Space Shuttle Challenger disaster and the O-Ring failure in the rocket booster, is there now better material used rather than rubber for such O-Rings? - Quora
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Dixon 15020FXFMI00000 Malleable Iron Single Plane O-Ring Swivel Joint, Style 20, 1-1/2" NPT Female: O Ring Seals: Amazon.com: Industrial & Scientific
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Ideal Vacuum | Viton O-Ring for 22 mm ID O-Ring Joint Glass Vessels, O-Ring Joint #020 O-Ring, B-020-75A
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O-Ring 10PCS Oil Return Pipe Joint Sealing Ring E1023505 for Bosch Piezo Diesel Injector 0445115 Sprayer 0445116 - AliExpress
![Dixon 230FXFAL00000 Aluminum Single Plane O-Ring Swivel Joint, Style 30, 2" NPT Female: O Ring Seals: Amazon.com: Industrial & Scientific Dixon 230FXFAL00000 Aluminum Single Plane O-Ring Swivel Joint, Style 30, 2" NPT Female: O Ring Seals: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/81AYCoYBkwL._AC_UF1000,1000_QL80_.jpg)
Dixon 230FXFAL00000 Aluminum Single Plane O-Ring Swivel Joint, Style 30, 2" NPT Female: O Ring Seals: Amazon.com: Industrial & Scientific
![Ideal Vacuum | NW KF-25 to 15mm ID Glass O-Ring Joint Adapter, Stainless Steel, uses No. 28 Joint Clamp SS Ideal Vacuum | NW KF-25 to 15mm ID Glass O-Ring Joint Adapter, Stainless Steel, uses No. 28 Joint Clamp SS](https://www.idealvac.com/files/images/KF-Oring-Adapter_KF-03-100.jpg)