-204 RED SILICONE 70D FDA O-RING

S70FDA204 is an AS568-204 red Silicone 70 Shore A O-Ring built to an inside diameter of 0.359 in (9.12 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 0.637 in (16.18 mm). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

It resists dry heat, ozone and UV exposure, and many oxidizing chemicals. That behavior comes from the compound itself: Silicone is valued for very good compression set resistance across its range and flexibility that holds at very low temperatures. Rated temperature range runs from -80°F (-62.2°C) to 450°F (232.2°C) in continuous service. It is not the right choice where steam above its rated range or abrasive dynamic service are present.

This o-ring meets FDA requirements for food contact under 21 CFR 177.2600. It sees regular use in medical devices, electronics and electrical enclosures, and pharmaceutical manufacturing.

Stocked as S70FDA204 and sold individually. Unit weight is approximately 0.537 g and nominal inside diameter is listed as 3/8 inch. Check the compound against your process media, pressure and temperature before committing to a design. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.