FSIL Parker LM158-60 O-Ring, Size: -020
Material: FSIL Parker LM158-60 O-Ring
Size: AS568 -020 O-Ring
Part Number: LM158-60-OR-020
Parker Seal® (Parker)
LM158-60
Fluorosilicone (FVMQ, FSIL)
60
Shore A
MIL-DTL-25988, AMS-R-25988, MIL-R- 25988 Class 1, Type 1 & 2., AMS 3325
General Purpose Material
Color: Blue
Detailed Description
LM158-60-OR-020 is a Blue, 60 Shore A, Fluorosilicone (FVMQ, FSIL) O-Ring made from Parker Seal® (Parker). Parker Seal® (Parker) LM158-60 is manufactured with the following features & specifications: MIL-DTL-25988, AMS-R-25988, MIL-R- 25988 Class 1, Type 1 & 2., AMS 3325, General Purpose Material. LM158-60-OR-020 is AS568 size -020 O-Ring also referred to as 1.78mm (Cross Sectional Diameter (CS)) x 21.95mm (Inside Diameter (ID)).
Material: FSIL Parker LM158-60 O-Ring
Size: AS568 -020, 1.78mm CS X 21.95mm ID (0.070" CS X 0.864" ID)
| Technical Specification | Value |
|---|---|
| Compound Number | LM158-60 |
| Brand | Parker Seal® (Parker) |
| Material | Fluorosilicone (FVMQ, FSIL) |
| Color | Blue |
| Durometer | 60 Shore A |
| High Temperature | 177 °C / 351 °F |
| Low Temperature | -73 °C / -99 °F |
| Geometry Specifications | |
| Cross Sectional Geometry | O-Ring |
| Size Standard | AS568 |
| Size | -020 |
| Cross Section (CS) | 1.78 mm / 0.070 in |
| Inside Diameter (ID) | 21.95 mm / 0.864 in |
| Other Specifications | |
MIL-DTL-25988, AMS-R-25988, MIL-R- 25988 Class 1, Type 1 & 2., AMS 3325 | |
Parker’s LM158-60 is a 60 Shore A blue fluorosilicone (FVMQ) compound engineered for aerospace and industrial sealing applications that require reliable fuel and solvent resistance across extreme temperature ranges. Designed for operation from approximately -100°F to 350°F, it maintains flexibility in cold environments while delivering stable sealing performance at elevated temperatures. This material offers strong compatibility with fuels and solvents commonly encountered in aerospace systems, along with good resistance to aging and environmental exposure. Its balanced durometer provides improved conformability compared to higher-hardness grades while retaining sufficient strength for dependable static and light dynamic sealing.
LM158-60 is manufactured to AMS-R-25988 Type I, Class I, Grade 60 and meets AMS 3325 requirements, supporting use in regulated aerospace fuel system applications. It is commonly used for O-rings and gaskets in aircraft components, fuel handling assemblies, and systems exposed to wide thermal cycling. This compound is selected when low-temperature elasticity, fuel compatibility, and aerospace specification compliance are critical. Canyon Components offers equivalent fluorosilicone materials designed to match the performance, temperature capability, and certification profile of Parker LM158-60.
Common relevant keywords:
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