Introduction
Fluorocarbon (FKM) O-Rings with a 0.275-inch cross section are designed for demanding sealing applications where high temperature resistance, chemical compatibility, and long service life are essential. Commonly specified in industrial vacuum systems, chemical processing equipment, and high-performance machinery, FKM O-rings provide reliable sealing performance under harsh thermal and chemical conditions.
Detailed Description
Our FKM O-Rings (0.275 section) are manufactured from high-quality fluorocarbon elastomer compounds formulated for excellent resistance to heat, oils, fuels, and aggressive chemicals. The 0.275-inch cross section is typically used in heavy-duty static and dynamic seals, where higher compression force and enhanced sealing reliability are required.
FKM materials maintain elasticity and sealing integrity over a wide temperature range while exhibiting low compression set and good aging resistance. Precision molding and post-curing processes ensure consistent cross-sectional geometry, smooth surface finish, and dimensional stability—critical factors for vacuum sealing and pressure-retaining applications. Custom inner diameters, hardness levels, and compound grades are available to match specific operating environments.
Applications
Fluorocarbon (FKM) O-Rings with 0.275 section are widely used in:
Vacuum chambers and PVD / CVD equipment
Semiconductor and thin film processing tools
Chemical processing and fluid handling systems
Aerospace and automotive fuel systems
High-temperature pumps, valves, and compressors
Industrial sealing applications requiring chemical resistance
Technical Parameters
| Parameter | Typical Value / Range | Importance |
|---|---|---|
| Material | Fluorocarbon (FKM) | Provides heat & chemical resistance |
| Cross Section | 0.275 inch | Ensures robust sealing force |
| Hardness | 70 – 90 Shore A (custom) | Balances sealing and wear resistance |
| Operating Temperature | −20 °C to +200 °C (typical) | Suitable for high-temperature service |
| Chemical Resistance | Oils, fuels, acids, solvents | Extends service life |
| Color | Brown / Black (typical) | Standard industrial identification |
Comparison with Other Elastomer O-Rings
| Material | Key Advantage | Typical Application |
|---|---|---|
| FKM | Excellent heat & chemical resistance | Vacuum & chemical systems |
| NBR (Buna-N) | Cost-effective | General oil sealing |
| EPDM | Good weather & steam resistance | Water & steam systems |
| Silicone | Wide temperature range | Low-pressure static seals |
FAQ
| Question | Answer |
|---|---|
| Can the inner diameter be customized? | Yes, various inner diameters are available upon request. |
| Are these O-rings suitable for vacuum use? | Yes, FKM is commonly used in vacuum and thin film systems. |
| What hardness should I choose? | 75 Shore A is common; higher hardness is available for high pressure. |
| How are the O-rings packaged? | Cleaned, sealed in protective bags, and packed in export-grade cartons. |
Packaging
Our FKM O-Rings (0.275 Section) are carefully cleaned, individually packed or batch-sealed, and clearly labeled to ensure traceability and cleanliness. Protective packaging prevents deformation and contamination during storage and transportation.
Conclusion
Fluorocarbon (FKM) O-Rings with a 0.275-inch cross section offer dependable sealing performance for high-temperature, chemically aggressive, and vacuum environments. With excellent durability, dimensional consistency, and customization options, they are a reliable sealing solution for industrial, semiconductor, and advanced manufacturing applications.
For detailed specifications and a quotation, please contact us at sales@thinfilmmaterials.com.
Ordering Table
| Drawing | Reference | O-Ring Size | O-Ring Material | O-Ring OD | O-Ring ID | O-Ring Cross Section | O-Ring Color | Part Number |
| O-ring Seals, Fluorcarbon (FKM) | 400 | 9505-75 Fluorocarbon | 1.900 | 1.350 | 0.275 | Brown | O-V400 |
| O-ring Seals, Fluorcarbon (FKM) | 401 | 9505-75 Fluorocarbon | 2.025 | 1.475 | 0.275 | Brown | O-V401 |
| O-ring Seals, Fluorcarbon (FKM) | 402 | 9505-75 Fluorocarbon | 2.150 | 1.600 | 0.275 | Brown | O-V402 |
| O-ring Seals, Fluorcarbon (FKM) | 403 | 9505-75 Fluorocarbon | 2.275 | 1.725 | 0.275 | Brown | O-V403 |
| O-ring Seals, Fluorcarbon (FKM) | 404 | 9505-75 Fluorocarbon | 2.400 | 1.850 | 0.275 | Brown | O-V404 |
| O-ring Seals, Fluorcarbon (FKM) | 405 | 9505-75 Fluorocarbon | 2.525 | 1.975 | 0.275 | Brown | O-V405 |
| O-ring Seals, Fluorcarbon (FKM) | 406 | 9505-75 Fluorocarbon | 2.650 | 2.100 | 0.275 | Brown | O-V406 |
| O-ring Seals, Fluorcarbon (FKM) | 407 | 9505-75 Fluorocarbon | 2.775 | 2.225 | 0.275 | Brown | O-V407 |
| O-ring Seals, Fluorcarbon (FKM) | 408 | 9505-75 Fluorocarbon | 2.900 | 2.350 | 0.275 | Brown | O-V408 |
| O-ring Seals, Fluorcarbon (FKM) | 409 | 9505-75 Fluorocarbon | 3.025 | 2.475 | 0.275 | Brown | O-V409 |
| O-ring Seals, Fluorcarbon (FKM) | 410 | 9505-75 Fluorocarbon | 3.150 | 2.600 | 0.275 | Brown | O-V410 |
| O-ring Seals, Fluorcarbon (FKM) | 411 | 9505-75 Fluorocarbon | 3.275 | 2.725 | 0.275 | Brown | O-V411 |
| O-ring Seals, Fluorcarbon (FKM) | 412 | 9505-75 Fluorocarbon | 3.400 | 2.850 | 0.275 | Brown | O-V412 |
| O-ring Seals, Fluorcarbon (FKM) | 413 | 9505-75 Fluorocarbon | 3.525 | 2.975 | 0.275 | Brown | O-V413 |
| O-ring Seals, Fluorcarbon (FKM) | 414 | 9505-75 Fluorocarbon | 3.650 | 3.100 | 0.275 | Brown | O-V414 |
| O-ring Seals, Fluorcarbon (FKM) | 415 | 9505-75 Fluorocarbon | 3.775 | 3.225 | 0.275 | Brown | O-V415 |
| O-ring Seals, Fluorcarbon (FKM) | 416 | 9505-75 Fluorocarbon | 3.900 | 3.350 | 0.275 | Brown | O-V416 |
| O-ring Seals, Fluorcarbon (FKM) | 417 | 9505-75 Fluorocarbon | 4.025 | 3.475 | 0.275 | Brown | O-V417 |
| O-ring Seals, Fluorcarbon (FKM) | 418 | 9505-75 Fluorocarbon | 4.150 | 3.600 | 0.275 | Brown | O-V418 |
| O-ring Seals, Fluorcarbon (FKM) | 419 | 9505-75 Fluorocarbon | 4.275 | 3.725 | 0.275 | Brown | O-V419 |
| O-ring Seals, Fluorcarbon (FKM) | 420 | 9505-75 Fluorocarbon | 4.400 | 3.850 | 0.275 | Brown | O-V420 |
| O-ring Seals, Fluorcarbon (FKM) | 421 | 9505-75 Fluorocarbon | 4.525 | 3.975 | 0.275 | Brown | O-V421 |
| O-ring Seals, Fluorcarbon (FKM) | 422 | 9505-75 Fluorocarbon | 4.650 | 4.100 | 0.275 | Brown | O-V422 |
| O-ring Seals, Fluorcarbon (FKM) | 423 | 9505-75 Fluorocarbon | 4.775 | 4.225 | 0.275 | Brown | O-V423 |
| O-ring Seals, Fluorcarbon (FKM) | 424 | 9505-75 Fluorocarbon | 4.900 | 4.350 | 0.275 | Brown | O-V424 |
| O-ring Seals, Fluorcarbon (FKM) | 425 | 9505-75 Fluorocarbon | 5.025 | 4.475 | 0.275 | Brown | O-V425 |
| O-ring Seals, Fluorcarbon (FKM) | 426 | 9505-75 Fluorocarbon | 5.150 | 4.600 | 0.275 | Brown | O-V426 |
| O-ring Seals, Fluorcarbon (FKM) | 427 | 9505-75 Fluorocarbon | 5.275 | 4.725 | 0.275 | Brown | O-V427 |
| O-ring Seals, Fluorcarbon (FKM) | 428 | 9505-75 Fluorocarbon | 5.400 | 4.850 | 0.275 | Brown | O-V428 |
| O-ring Seals, Fluorcarbon (FKM) | 429 | 9505-75 Fluorocarbon | 5.525 | 4.975 | 0.275 | Brown | O-V429 |
| O-ring Seals, Fluorcarbon (FKM) | 430 | 9505-75 Fluorocarbon | 5.650 | 5.100 | 0.275 | Brown | O-V430 |
| O-ring Seals, Fluorcarbon (FKM) | 431 | 9505-75 Fluorocarbon | 5.775 | 5.225 | 0.275 | Brown | O-V431 |
| O-ring Seals, Fluorcarbon (FKM) | 432 | 9505-75 Fluorocarbon | 5.900 | 5.350 | 0.275 | Brown | O-V432 |
| O-ring Seals, Fluorcarbon (FKM) | 433 | 9505-75 Fluorocarbon | 6.025 | 5.475 | 0.275 | Brown | O-V433 |
| O-ring Seals, Fluorcarbon (FKM) | 434 | 9505-75 Fluorocarbon | 6.150 | 5.600 | 0.275 | Brown | O-V434 |
| O-ring Seals, Fluorcarbon (FKM) | 435 | 9505-75 Fluorocarbon | 6.275 | 5.725 | 0.275 | Brown | O-V435 |
|
| O-ring Seals, Fluorcarbon (FKM) | 436 | 9505-75 Fluorocarbon | 6.400 | 5.850 | 0.275 | Brown | O-V436 |
| O-ring Seals, Fluorcarbon (FKM) | 437 | 9505-75 Fluorocarbon | 6.525 | 5.975 | 0.275 | Brown | O-V437 |
| O-ring Seals, Fluorcarbon (FKM) | 438 | 9505-75 Fluorocarbon | 6.775 | 6.225 | 0.275 | Brown | O-V438 |
| O-ring Seals, Fluorcarbon (FKM) | 439 | 9505-75 Fluorocarbon | 7.025 | 6.475 | 0.275 | Brown | O-V439 |
| O-ring Seals, Fluorcarbon (FKM) | 440 | 9505-75 Fluorocarbon | 7.275 | 6.725 | 0.275 | Brown | O-V440 |
| O-ring Seals, Fluorcarbon (FKM) | 441 | 9505-75 Fluorocarbon | 7.525 | 6.975 | 0.275 | Brown | O-V441 |
| O-ring Seals, Fluorcarbon (FKM) | 442 | 9505-75 Fluorocarbon | 7.775 | 7.225 | 0.275 | Brown | O-V442 |
| O-ring Seals, Fluorcarbon (FKM) | 443 | 9505-75 Fluorocarbon | 8.025 | 7.475 | 0.275 | Brown | O-V443 |
| O-ring Seals, Fluorcarbon (FKM) | 444 | 9505-75 Fluorocarbon | 8.275 | 7.725 | 0.275 | Brown | O-V444 |
| O-ring Seals, Fluorcarbon (FKM) | 445 | 9505-75 Fluorocarbon | 8.525 | 7.975 | 0.275 | Brown | O-V445 |
| O-ring Seals, Fluorcarbon (FKM) | 446 | 9505-75 Fluorocarbon | 9.025 | 8.475 | 0.275 | Brown | O-V446 |
| O-ring Seals, Fluorcarbon (FKM) | 447 | 9505-75 Fluorocarbon | 9.525 | 8.975 | 0.275 | Brown | O-V447 |
| O-ring Seals, Fluorcarbon (FKM) | 448 | 9505-75 Fluorocarbon | 10.025 | 9.475 | 0.275 | Brown | O-V448 |
| O-ring Seals, Fluorcarbon (FKM) | 449 | 9505-75 Fluorocarbon | 10.525 | 9.975 | 0.275 | Brown | O-V449 |
| O-ring Seals, Fluorcarbon (FKM) | 450 | 9505-75 Fluorocarbon | 11.025 | 10.475 | 0.275 | Brown | O-V450 |
| O-ring Seals, Fluorcarbon (FKM) | 451 | 9505-75 Fluorocarbon | 11.525 | 10.975 | 0.275 | Brown | O-V451 |
| O-ring Seals, Fluorcarbon (FKM) | 452 | 9505-75 Fluorocarbon | 12.025 | 11.475 | 0.275 | Brown | O-V452 |
| O-ring Seals, Fluorcarbon (FKM) | 453 | 9505-75 Fluorocarbon | 12.525 | 11.975 | 0.275 | Brown | O-V453 |
| O-ring Seals, Fluorcarbon (FKM) | 454 | 9505-75 Fluorocarbon | 13.025 | 12.475 | 0.275 | Brown | O-V454 |
| O-ring Seals, Fluorcarbon (FKM) | 455 | 9505-75 Fluorocarbon | 13.525 | 12.975 | 0.275 | Brown | O-V455 |
| O-ring Seals, Fluorcarbon (FKM) | 456 | 9505-75 Fluorocarbon | 14.007 | 13.457 | 0.275 | Brown | O-V456 |
| O-ring Seals, Fluorcarbon (FKM) | 457 | 9505-75 Fluorocarbon | 14.525 | 13.975 | 0.275 | Brown | O-V457 |
| O-ring Seals, Fluorcarbon (FKM) | 458 | 9505-75 Fluorocarbon | 15.025 | 14.475 | 0.275 | Brown | O-V458 |
| O-ring Seals, Fluorcarbon (FKM) | 459 | 9505-75 Fluorocarbon | 15.525 | 14.975 | 0.275 | Brown | O-V459 |
| O-ring Seals, Fluorcarbon (FKM) | 460 | 9505-75 Fluorocarbon | 16.025 | 15.475 | 0.275 | Brown | O-V460 |
| O-ring Seals, Fluorcarbon (FKM) | 461 | 9505-75 Fluorocarbon | 16.505 | 15.955 | 0.275 | Brown | O-V461 |
| O-ring Seals, Fluorcarbon (FKM) | 462 | 9505-75 Fluorocarbon | 17.005 | 16.455 | 0.275 | Brown | O-V462 |
| O-ring Seals, Fluorcarbon (FKM) | 463 | 9505-75 Fluorocarbon | 17.505 | 16.955 | 0.275 | Brown | O-V463 |
| O-ring Seals, Fluorcarbon (FKM) | 464 | 9505-75 Fluorocarbon | 18.005 | 17.455 | 0.275 | Brown | O-V464 |
| O-ring Seals, Fluorcarbon (FKM) | 465 | 9505-75 Fluorocarbon | 18.505 | 17.955 | 0.275 | Brown | O-V465 |
| O-ring Seals, Fluorcarbon (FKM) | 466 | 9505-75 Fluorocarbon | 19.005 | 18.455 | 0.275 | Brown | O-V466 |
| O-ring Seals, Fluorcarbon (FKM) | 467 | 9505-75 Fluorocarbon | 19.505 | 18.955 | 0.275 | Brown | O-V467 |
| O-ring Seals, Fluorcarbon (FKM) | 468 | 9505-75 Fluorocarbon | 20.005 | 19.455 | 0.275 | Brown | O-V468 |
| O-ring Seals, Fluorcarbon (FKM) | 469 | 9505-75 Fluorocarbon | 20.505 | 19.955 | 0.275 | Brown | O-V469 |
| O-ring Seals, Fluorcarbon (FKM) | 470 | 9505-75 Fluorocarbon | 21.505 | 20.955 | 0.275 | Brown | O-V470 |
| O-ring Seals, Fluorcarbon (FKM) | 471 | 9505-75 Fluorocarbon | 22.505 | 21.955 | 0.275 | Brown | O-V471 |
| O-ring Seals, Fluorcarbon (FKM) | 472 | 9505-75 Fluorocarbon | 23.490 | 22.940 | 0.275 | Brown | O-V472 |
| O-ring Seals, Fluorcarbon (FKM) | 473 | 9505-75 Fluorocarbon | 24.490 | 23.940 | 0.275 | Brown | O-V473 |
| O-ring Seals, Fluorcarbon (FKM) | 474 | 9505-75 Fluorocarbon | 25.490 | 24.940 | 0.275 | Brown | O-V474 |
| O-ring Seals, Fluorcarbon (FKM) | 475 | 9505-75 Fluorocarbon | 26.490 | 25.940 | 0.275 | Brown | O-V475 |
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