SIL SI70OR51 O-Ring, Size: 1.8X6.3
Material: SIL SI70OR51 O-Ring
Size: Metric 1.8X6.3 O-Ring
Part Number: SI70OR51-OR-1.8X6.3
Color: Orange
Detailed Description
SI70OR51-OR-1.8X6.3 is a Orange, 70 Shore A, Silicone (VMQ) O-Ring. SI70OR51-OR-1.8X6.3 is Metric size 1.8X6.3 O-Ring also referred to as 1.8mm (Cross Sectional Diameter (CS)) x 6.3mm (Inside Diameter (ID)).
Material: SIL SI70OR51 O-Ring
Size: Metric 1.8X6.3, 1.80mm CS X 6.30mm ID (0.071" CS X 0.248" ID)
| Technical Specification | Value |
|---|---|
| Compound Number | SI70OR51 |
| Material | Silicone (VMQ) |
| Color | Orange |
| Durometer | 70 Shore A |
| Geometry Specifications | |
| Cross Sectional Geometry | O-Ring |
| Size Standard | Metric |
| Size | 1.8X6.3 |
| Cross Section (CS) | 1.80 mm / 0.071 in |
| Inside Diameter (ID) | 6.30 mm / 0.248 in |
SI70OR51 is a 70 shore A orange silicone (VMQ) compound that is peroxide cured and manufactured to AS3582, AMS 3304, and A-A-59588 (2A-70 and 2B-70) specifications for high reliability sealing. This material is well suited for O-rings and gaskets used in aerospace, industrial, and environmental applications where consistent performance across a wide temperature range is required. It offers good resistance to ozone, detergents, salt water, and vegetable and animal oils, while maintaining flexibility from -60°C up to 232°C. SI70OR51 meets ASTM D2000 M5GE706 requirements and can be compared to Parker S0604-70 when evaluating equivalent silicone sealing materials.
Silicone rubber, commonly referred to as VMQ, is widely used in O-rings and gaskets due to its broad temperature range and excellent resistance to environmental degradation. These materials maintain elasticity in both extreme cold and heat, making them ideal for applications involving thermal cycling and outdoor exposure. Aerospace-grade silicone compounds that meet AMS and A-A-59588 standards are commonly used where durability, consistency, and compliance are critical. While highly versatile, silicone materials are generally not recommended for use with petroleum fuels or certain aggressive chemicals, making proper material selection important.
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