-903 RED SILICONE 70D FDA O-RING

APG stocks the S70FDA903, an AS568-903 red Silicone 70 Shore A O-Ring with an inside diameter of 0.301 in (7.65 mm), a cross section of 0.064 in (1.63 mm), and an outside diameter of 0.429 in (10.9 mm). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Expect good resistance to ozone and UV exposure, many oxidizing chemicals, and dry heat. That behavior comes from the compound itself: Silicone is known for very good compression set resistance across its range and flexibility that holds at very low temperatures. Published continuous service range is -80°F (-62.2°C) to 450°F (232.2°C). It is not the right choice where concentrated acids or hydrocarbon fuels and oils are present.

The compound meets FDA requirements for food contact under 21 CFR 177.2600. It sees regular use in sanitary process lines, pharmaceutical manufacturing, and electronics and electrical enclosures.

S70FDA903 ships individually. Unit weight is approximately 0.087 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.