The S1.2X3.5 is a red Silicone 70 Shore A O-Ring measuring an inside diameter of 3.5 mm (0.138 in), a cross section of 1.2 mm (0.047 in), and an outside diameter of 5.9 mm (0.23 in). This o-ring remains the most cost-effective sealing element available for pressurized assemblies.
Silicone is specified here for physiological inertness and low toxicity, flexibility that holds at very low temperatures. The compound resists extreme heat and cold, weathering, and ozone and UV exposure. The material carries a published service range of -80°F (-62.2°C) to 450°F (232.2°C). It should not be specified for service in steam above its rated range or hydrocarbon fuels and oils.
The compound meets FDA requirements for food contact. You will find this material specified across pharmaceutical manufacturing, sanitary process lines, and food and beverage processing.
Order part number S1.2X3.5, sold individually. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.
Description 1.2MM CS X 3.5MM ID RED SILICONE 70D
Actual Outside Diameter 5.9 mm (0.23 inch)
Actual Cross Section 1.2 mm (0.047 inch)
Actual Inside Diameter 3.5 mm (0.138 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity