Image shown is representative and may differ from the actual product in size, proportions, and color shade
0.275 in
(6.99 mm)
7.475 in
(189.87 mm)
FSIL FS80BU00 X-Ring, Size: -443
Material: FSIL FS80BU00 X-Ring
Size: AS568 -443 X-Ring
Part Number: FS80BU00-XR-443
Color: Blue
Detailed Description
FS80BU00-XR-443 is a Blue, 80 Shore A, Fluorosilicone (FVMQ, FSIL) X-Ring. It is a 80 durometer Fluorosilicone (FVMQ, FSIL). FS80BU00-XR-443 is AS568 size -443 X-Ring also referred to as 6.99mm (Cross Sectional Diameter (CS)) x 189.87mm (Inside Diameter (ID)). Material: 80 Durometer FSIL FS80BU00 X-Ring Size: AS568 -443, 6.99mm CS X 189.87mm ID (0.275" CS X 7.475" ID)
| Technical Specification | Value |
|---|---|
| Compound Number | FS80BU00 |
| Material | Fluorosilicone (FVMQ, FSIL) |
| Color | Blue |
| Durometer | 80 Shore A Hardness |
| High Temperature | 175 °C / 347 °F |
| Low Temperature | -75 °C / -103 °F |
| Geometry Specifications | |
| Cross Sectional Geometry | X-Ring |
| Size Standard | AS568 |
| Size | -443 |
| Cross Section (CS) | 6.99 mm / 0.275 in |
| Inside Diameter (ID) | 189.87 mm / 7.475 in |
Canyon’s FS80BU00 is an 80 Shore A blue Fluorosilicone compound engineered for fuel-resistant sealing applications that require higher hardness, mechanical stability, and wide temperature capability. Manufactured in compliance with MIL-DTL-25988 and AMS-R-25988, MIL-R-25988 Class 1 Type 1 and Type 2 Grade 80, it delivers dependable compression set resistance and elastic recovery under sustained load. With a service temperature range of -73°C to 177°C (-100°F to 350°F), FS80BU00 maintains sealing integrity in extreme cold and elevated temperature environments. The fluorosilicone chemistry provides excellent resistance to fuels, oils, aging, weathering, and ultraviolet exposure where standard silicone materials are insufficient.
FS80BU00 is commonly used in O-rings and gaskets for aerospace, defense, automotive, and industrial systems exposed to aviation fuels, automotive fuels, and chemically aggressive atmospheres. Its higher durometer supports improved extrusion resistance and dimensional stability in static and moderate dynamic sealing conditions. This compound offers a robust fluorosilicone solution for designs that demand fuel compatibility, environmental durability, and military specification alignment without QPL restrictions.
Common relevant keywords:
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