Image shown is representative and may differ from the actual product in size, proportions, and color shade
0.157 in
(4.00 mm)
4.961 in
(126.00 mm)
FKM VT80BK40 O-Ring, Size: 4X126
Material: FKM VT80BK40 O-Ring
Size: Metric 4X126 O-Ring
Part Number: VT80BK40-OR-4X126
VT80BK40
FKM (Viton®)
80
Shore A
FKM Type GFLT (Low Temp, High Fluorine Viton®)
Low Temperature Material
Color: Black
Detailed Description
VT80BK40-OR-4X126 is a Black, 80 Shore A, FKM (Viton®) O-Ring, a FKM Type GFLT (Low Temp, High Fluorine Viton®) product. It is a 80 durometer FKM (Viton®). VT80BK40 is manufactured with the following features & specifications: Low Temperature Material. VT80BK40-OR-4X126 is Metric size 4X126 O-Ring also referred to as 4mm (Cross Sectional Diameter (CS)) x 126mm (Inside Diameter (ID)). Material: 80 Durometer FKM VT80BK40 O-Ring Size: Metric 4X126, 4mm CS X 126mm ID (0.157" CS X 4.961" ID)
| Technical Specification | Value |
|---|---|
| Compound Number | VT80BK40 |
| Material | FKM (Viton®) |
| Subtype | FKM Type GFLT (Low Temp, High Fluorine Viton®) |
| Color | Black |
| Durometer | 80 Shore A Hardness |
| High Temperature | 225 °C / 437 °F |
| Low Temperature | -37 °C / -35 °F |
| Geometry Specifications | |
| Cross Sectional Geometry | O-Ring |
| Size Standard | Metric |
| Size | 4X126 |
| Cross Section (CS) | 4.00 mm / 0.157 in |
| Inside Diameter (ID) | 126.00 mm / 4.961 in |
VT80BK40 is an 80 shore A black FKM Type GFLT compound engineered for demanding sealing environments that require both enhanced chemical resistance and improved low temperature flexibility. This material is ideal for O-rings and gaskets exposed to steam, acids, aromatic hydrocarbons, and aggressive industrial media, while maintaining strong performance in fuels and oils. Its higher durometer improves extrusion resistance and durability in higher pressure applications, while still providing reliable sealing down to -37°C, with static capability to -40°C. VT80BK40 meets ASTM D2000 M7HK810 requirements and can be compared to Parker V1163-75 when evaluating equivalent GFLT-type FKM materials.
FKM, commonly referred to as Viton®, is a high performance fluoroelastomer widely used in O-rings and gaskets where resistance to heat, fuels, and harsh chemicals is essential. GFLT-type FKM compounds are advanced formulations designed to extend both low temperature performance and chemical compatibility beyond standard and GLT grades. These materials are commonly used in oil and gas, chemical processing, and aerospace applications where thermal cycling and exposure to aggressive media are present. While highly versatile, FKM materials are generally not recommended for certain polar solvents or extreme steam conditions beyond their limits, making proper material selection critical.
Keywords: VT80BK40, VT 80BK40, VT-80BK40, VT80 BK40, FKM GFLT, low temp FKM, chemical resistant fluorocarbon, steam resistant elastomer, acid resistant O-rings, aromatic hydrocarbon resistant rubber, ASTM D2000 M7HK810, Parker V1163-75 equivalent, high performance gasket material, industrial sealing elastomer, Datasheet, TDS, Test Report, MTR, MSDS, SDS, Parker V1163-75 O-rings, Parker V1163 FKM seals, Parker V163-75 Viton® gasket material, Parker V1163-75 fluorocarbon seals, Parker V1163 FKM compound, Parker V163 chemically resistant Viton® O-rings
