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Gaskets for Ultra-High-Vacuum Flanges
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Install these gaskets between two CF flanges—also known as Conflat or UHV flanges—to create extremely tight seals in ultra-high-vacuum systems. Made from 101 copper, these gaskets have virtually no oxygen to outgas, so they won’t cause oxidation or contaminate your system. They also form stronger seals than rubber gaskets. As you bolt the flanges together, sharp inner teeth bite into these gaskets to form an airtight metal-to-metal seal.
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For Flange OD | For High-Vacuum Flange Size | ID | OD | Thk. | For High Vacuum Connection | Material | Specs. Met | 1-9 | 10-Up | ||
| 1 21/64" | 16 | 0.64" | 0.838" | 0.08" | CF | 101 Copper | ASTM B152, ASTM F68 | 9088K51 | 00000 | 00000 | |
| 2 1/8" | 25 | 1.01" | 1.29" | 0.08" | CF | 101 Copper | ASTM B152, ASTM F68 | 9088K56 | 0000 | 0000 | |
| 2 3/4" | 40 | 1.451" | 1.895" | 0.08" | CF | 101 Copper | ASTM B152, ASTM F68 | 9088K52 | 0000 | 0000 | |
| 4 1/2" | 63 | 2.506" | 3.243" | 0.08" | CF | 101 Copper | ASTM B152, ASTM F68 | 9088K53 | 0000 | 0000 | |
| 6" | 100 | 4.006" | 4.743" | 0.08" | CF | 101 Copper | ASTM B152, ASTM F68 | 9088K54 | 00000 | 0000 | |
| 6 3/4" | 125 | 5.01" | 5.567" | 0.08" | CF | 101 Copper | ASTM B152, ASTM F68 | 9088K57 | 00000 | 00000 | |
| 8" | 160 | 6.007" | 6.743" | 0.08" | CF | 101 Copper | ASTM B152, ASTM F68 | 9088K55 | 00000 | 00000 | |
