568-259 PTFE ORINGS FDA

APG stocks the TFE259, an AS568-259 white PTFE (Teflon) 55 Shore D O-Ring built to an inside diameter of 6.234 in (158.34 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 6.512 in (165.4 mm). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

PTFE (Teflon) is specified here for non-stick, non-contaminating surface characteristics and near-universal chemical inertness. The material holds up against oxidizing media, steam, and strong acids and bases. The material carries a published service range of -65°F (-53.9°C) to 500°F (260°C). Verify compatibility before use with elemental fluorine at temperature or molten alkali metals.

Common environments for this compound include food and beverage, laboratory equipment, and semiconductor fabrication.

Stocked as TFE259 and sold individually. Nominal inside diameter is listed as 6 1/4 inch. 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.