Image shown is representative and may differ from the actual product in size, proportions, and color shade
0.157 in
(4.00 mm)
3.031 in
(77.00 mm)
SIL SI60OR20 X-Ring, Size: 4X77
Material: SIL SI60OR20 X-Ring
Size: Metric 4X77 X-Ring
Part Number: SI60OR20-XR-4X77
SI60OR20
Silicone (VMQ)
60
Shore A
Low Temperature Material
Color: Orange
Detailed Description
SI60OR20-XR-4X77 is a Orange, 60 Shore A, Silicone (VMQ) X-Ring. It is a 60 durometer Silicone (VMQ). SI60OR20 is manufactured with the following features & specifications: Low Temperature Material. SI60OR20-XR-4X77 is Metric size 4X77 X-Ring also referred to as 4mm (Cross Sectional Diameter (CS)) x 77mm (Inside Diameter (ID)). Material: 60 Durometer SIL SI60OR20 X-Ring Size: Metric 4X77, 4mm CS X 77mm ID (0.157" CS X 3.031" ID)
| Technical Specification | Value |
|---|---|
| Compound Number | SI60OR20 |
| Material | Silicone (VMQ) |
| Color | Orange |
| Durometer | 60 Shore A Hardness |
| High Temperature | 205 °C / 401 °F |
| Low Temperature | -80 °C / -112 °F |
| Geometry Specifications | |
| Cross Sectional Geometry | X-Ring |
| Size Standard | Metric |
| Size | 4X77 |
| Cross Section (CS) | 4.00 mm / 0.157 in |
| Inside Diameter (ID) | 77.00 mm / 3.031 in |
SI60OR20 is a 60 shore A orange silicone (VMQ) compound engineered for extreme low temperature sealing where flexibility and resilience are critical. This material maintains reliable performance down to -80°C, making it ideal for O-rings and gaskets used in cryogenic, aerospace, and cold environment industrial applications. Its lower durometer improves conformability in low pressure systems while still providing good resistance to ozone, detergents, salt water, and vegetable and animal oils. With a service temperature range up to 205°C, SI60OR20 meets ASTM D2000 M2GE605 requirements and delivers dependable sealing performance across a wide thermal range.
Silicone rubber, commonly referred to as VMQ, is widely used in O-rings and gaskets due to its exceptional temperature flexibility and resistance to environmental degradation. Low temperature silicone grades are specifically formulated to remain elastic in extreme cold conditions where most elastomers become brittle and fail. These materials are commonly used in aerospace, outdoor equipment, and industrial systems where thermal cycling and cold weather performance are essential. While highly versatile, silicone compounds are generally not recommended for use with petroleum fuels or certain aggressive chemicals, making proper material selection important.
Keywords: SI60OR20, SI 60OR20, SI-60OR20, SI60 OR20, low temp silicone rubber, extreme cold O-rings, VMQ 60A orange silicone, cryogenic elastomer, ASTM D2000 M2GE605, flexible gasket material, ozone resistant rubber, industrial silicone seals, low hardness silicone, Datasheet, TDS, Test Report, MTR, MSDS, SDS
