S3X99.5 is a red Silicone 70 Shore A O-Ring supplied with an inside diameter of 99.5 mm (3.917 in), a cross section of 3 mm (0.118 in), and an outside diameter of 105.5 mm (4.15 in). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.
The material holds up against weathering, ozone and UV exposure, and dry heat. That behavior comes from the compound itself: Silicone is specified for physiological inertness and low toxicity, flexibility that holds at very low temperatures. Published continuous service range is -80°F (-62.2°C) to 450°F (232.2°C). Verify compatibility before use with steam above its rated range or concentrated acids.
The compound meets FDA requirements for food contact. It sees regular use in medical devices, ovens and heated equipment, and electronics and electrical enclosures.
Reference part number S3X99.5 when ordering; the item is sold individually. As always, verify media compatibility and operating conditions against the requirements of your specific application.
description 3MM CS X 99.5MM ID RED SILICONE 70D
uf_description2 METRIC O-RING
Actual_OD 105.5 mm (4.15 inch)
Actual_CS 3 mm (0.118 inch)
Actual_ID 99.5 mm (3.917 inch)
ProductCode Description O-Rings - Metric - Commodity