canyon components logo
FS70BU01-OR-009
CS

0.070 in

(1.78 mm)

ID

0.208 in

(5.28 mm)

ORing cut reference

FSIL FS70BU01 O-Ring, Size: -009

Material: FSIL FS70BU01 O-Ring

Size: AS568 -009 O-Ring

Part Number: FS70BU01-OR-009

FS70BU01

Fluorosilicone (FVMQ, FSIL)

70

Shore A

UL 157

UL Listed Material

MIL-DTL-25988

AMS-R-25988

MIL-R-25988 CL 1 TY 1&2

Color: Blue

Detailed Description

FS70BU01-OR-009 is a Blue, 70 Shore A, Fluorosilicone (FVMQ, FSIL) O-Ring. It is a 70 durometer Fluorosilicone (FVMQ, FSIL). FS70BU01 is manufactured with the following features & specifications: UL 157, UL Listed Material. FS70BU01-OR-009 is AS568 size -009 O-Ring also referred to as 1.78mm (Cross Sectional Diameter (CS)) x 5.28mm (Inside Diameter (ID)).


Material: 70 Durometer FSIL FS70BU01 O-Ring


Size: AS568 -009, 1.78mm CS X 5.28mm ID (0.070" CS X 0.208" ID)

industry image
canyon components logo
Technical SpecificationValue
Compound NumberFS70BU01
MaterialFluorosilicone (FVMQ, FSIL)
ColorBlue
Durometer70 Shore A Hardness
High Temperature175 °C / 347 °F
Low Temperature-75 °C / -103 °F
Geometry Specifications
Cross Sectional GeometryO-Ring
Size StandardAS568
Size-009
Cross Section (CS)1.78 mm / 0.070 in
Inside Diameter (ID)5.28 mm / 0.208 in
Other Specifications

UL 157

UL Listed Material

ORing cut reference

Canyon’s FS70BU01 is a 70 Shore A blue Fluorosilicone compound engineered for fuel-resistant sealing applications that require regulatory compliance and dependable performance across extreme temperature ranges. Manufactured in compliance with MIL-DTL-25988 and AMS-R-25988, MIL-R-25988 Class 1 Type 1 and Type 2 Grade 70, and additionally UL 157 listed, it delivers consistent flexibility, good compression set resistance, and stable mechanical properties. With a service temperature range of -73°C to 177°C (-100°F to 350°F), FS70BU01 maintains sealing integrity in both cryogenic conditions and elevated temperature environments. Its fluorosilicone chemistry provides excellent resistance to fuels, oils, aging, weathering, and ultraviolet exposure where standard silicone materials are inadequate.

 

FS70BU01 is commonly used for O-rings and gaskets in aerospace, defense, automotive, and industrial systems exposed to aviation fuels, automotive fuels, and chemically aggressive atmospheres. The added UL 157 listing supports use in electrical enclosure and equipment sealing applications where fuel resistance and compliance are required. This compound offers a balanced solution for applications demanding fuel compatibility, low-temperature flexibility, environmental durability, and military specification compliance.

 

Common relevant keywords:
fluorosilicone fuel seals, UL 157 fluorosilicone, 70 Shore A fluorosilicone O-rings, MIL-DTL-25988 compliant silicone rubber, AMS-R-25988 elastomer seals, aviation fuel resistant gaskets, low temperature fluorosilicone material, blue fluorosilicone sealing compounds, aerospace fuel system O-rings, chemical resistant silicone elastomers, weather resistant fluorosilicone rubber, Datasheet, TDS, Test Report, MTR, MSDS, SDS 

Need a Custom Quote?

We manufacture millions of parts. Get in touch today.

Request a Quote

© 2026 Canyon Components, Inc. All rights reserved. Canyon Components International Corporation • Sitemap

These products may be covered by existing or pending patents. Canyon Components is not liable for the accuracy, currency, or completeness of information herein. All information is subject to change without notice. All trademarks and service marks are the property of their respective owners. Made withgu.dev, Icons by Icons8

* Disclaimer: Kalrez® is a registered trademark of DuPont™. It represents a high-performance perfluoroelastomer used in demanding sealing applications. Please note that the Kalrez® brand is not owned by Canyon Components. All rights and ownership of the Kalrez® trademark are held by DuPont™, ensuring the quality and reliability associated with this renowned brand.