Image shown is representative and may differ from the actual product in size, proportions, and color shade
0.157 in
(4.00 mm)
1.772 in
(45.00 mm)
FSIL CanGuard FS75BU51 O-Ring, Size: 4X45
Material: FSIL CanGuard FS75BU51 O-Ring
Size: Metric 4X45 O-Ring
Part Number: FS75BU51-OR-4X45
CanGuard™ (Canyon Components)
FS75BU51
Fluorosilicone (FVMQ, FSIL)
75
Shore A
EMI Silver and Aluminum Filled
Color: Blue
Detailed Description
FS75BU51-OR-4X45 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-4X45 is Metric size 4X45 O-Ring also referred to as 4mm (Cross Sectional Diameter (CS)) x 45mm (Inside Diameter (ID)). Material: 75 Durometer FSIL CanGuard FS75BU51 O-Ring Size: Metric 4X45, 4mm CS X 45mm ID (0.157" CS X 1.772" 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 | Metric |
| Size | 4X45 |
| Cross Section (CS) | 4.00 mm / 0.157 in |
| Inside Diameter (ID) | 45.00 mm / 1.772 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
