-257 BLACK AFLAS 80D O-RING

This o-ring is supplied in AS568-257 black Aflas (TFE/P) 80 Shore A with an inside diameter of 5.859 in (148.82 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 6.137 in (155.88 mm), catalogued under part number A80257. It remains the most cost-effective sealing element available for pressurized assemblies.

It resists amines and corrosion inhibitors, high-temperature steam, and hot water. That behavior comes from the compound itself: Aflas (TFE/P) is valued for high-temperature steam capability that most fluoroelastomers cannot match and exceptional resistance to amine-based additives. Continuous operating temperature is published at -25°F (-31.7°C) to 450°F (232.2°C).

Typical settings include geothermal equipment, power generation, and downhole tooling.

Stocked as A80257 and sold individually. Unit weight is approximately 7.552 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.