-256 RED SILICONE 70D FDA O-RING

Part number S70FDA256 is an AS568-256 red Silicone 70 Shore A O-Ring measuring an inside diameter of 5.734 in (145.64 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 6.012 in (152.7 mm). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Expect good resistance to many oxidizing chemicals, ozone and UV exposure, and dry heat. Silicone is known for flexibility that holds at very low temperatures and very good compression set resistance across its range. Continuous operating temperature is published at -80°F (-62.2°C) to 450°F (232.2°C). Applications involving concentrated acids or hydrocarbon fuels and oils call for a different compound.

This o-ring meets FDA requirements for food contact under 21 CFR 177.2600. Common environments for this compound include medical devices, pharmaceutical manufacturing, and food and beverage processing.

Stocked as S70FDA256 and sold individually. Unit weight is approximately 6.48 g and nominal inside diameter is listed as 5 3/4 inch. Check the compound against your process media, pressure and temperature before committing to a design. For a size or compound outside the standard catalog, APG can quote from a print or sample.