Image shown is representative and may differ from the actual product in size, proportions, and color shade
0.275 in
(6.99 mm)
1.725 in
(43.82 mm)
FSIL CanGuard FS75BU51 O-Ring, Size: -403
Material: FSIL CanGuard FS75BU51 O-Ring
Size: AS568 -403 O-Ring
Part Number: FS75BU51-OR-403
CanGuard™ (Canyon Components)
FS75BU51
Fluorosilicone (FVMQ, FSIL)
75
Shore A
EMI Silver and Aluminum Filled
Color: Blue
Detailed Description
FS75BU51-OR-403 is a Blue, 75 Shore A, Fluorosilicone (FVMQ, FSIL) O-Ring made from CanGuard™ (Canyon Components). It is a 75 durometer Fluorosilicone (FVMQ, FSIL). CanGuard™ (Canyon Components) FS75BU51 is manufactured with the following features & specifications: EMI Silver and Aluminum Filled. FS75BU51-OR-403 is AS568 size -403 O-Ring also referred to as 6.99mm (Cross Sectional Diameter (CS)) x 43.82mm (Inside Diameter (ID)). Material: 75 Durometer FSIL CanGuard FS75BU51 O-Ring Size: AS568 -403, 6.99mm CS X 43.82mm ID (0.275" CS X 1.725" ID)
| Technical Specification | Value |
|---|---|
| Compound Number | FS75BU51 |
| Brand | CanGuard™ (Canyon Components) |
| Material | Fluorosilicone (FVMQ, FSIL) |
| Color | Blue |
| Durometer | 75 Shore A Hardness |
| High Temperature | 160 °C / 320 °F |
| Low Temperature | -55 °C / -67 °F |
| Geometry Specifications | |
| Cross Sectional Geometry | O-Ring |
| Size Standard | AS568 |
| Size | -403 |
| Cross Section (CS) | 6.99 mm / 0.275 in |
| Inside Diameter (ID) | 43.82 mm / 1.725 in |
| Other Specifications | |
EMI Silver and Aluminum Filled | |
Canyon’s FS75BU51 is a 75 Shore A blue CanGuard Fluorosilicone compound engineered specifically for EMI and RFI shielding applications where environmental sealing and electrical conductivity are both required. Filled with silver plated aluminum and manufactured to MIL-DTL-83528 Type D, it provides effective electromagnetic shielding while maintaining good flexibility and compression set resistance. With a service temperature range of -55°C to 160°C (-67°F to 320°F), FS75BU51 performs reliably across wide thermal conditions while resisting fuels, oils, aging, weathering, and ultraviolet exposure. Its fluorosilicone base chemistry supports use in fuel-rich and chemically aggressive environments where standard conductive silicones may degrade.
FS75BU51 is commonly used for conductive O-rings, gaskets, and sealing elements in aerospace, defense, electronics enclosures, and shielded connectors where EMI and RFI control is critical. The combination of conductive filler and elastomeric sealing performance makes it suitable for applications requiring both environmental protection and electromagnetic compatibility. This compound offers a balanced solution for designers seeking MIL-qualified shielding materials with fuel resistance and long-term durability.
Common relevant keywords:
conductive fluorosilicone seals, EMI shielding O-rings, RFI shielding gaskets, silver aluminum filled elastomers, MIL-DTL-83528 Type D material, EMI gasket fluorosilicone, aerospace shielding seals, fuel resistant conductive rubber, environmental EMI sealing solutions, shielded enclosure gaskets, CanGuard fluorosilicone material, Datasheet, TDS, Test Report, MTR, MSDS, SDS
