568-373 PTFE ORINGS FDA

TFE373 is an AS568-373 white PTFE (Teflon) 55 Shore D O-Ring with an inside diameter of 8.975 in (227.97 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 9.395 in (238.63 mm). In service, this o-ring remains the most cost-effective sealing element available for pressurized assemblies.

This material stands up to nearly all industrial chemicals, steam, and strong acids and bases. That behavior comes from the compound itself: PTFE (Teflon) is known for near-universal chemical inertness and non-stick, non-contaminating surface characteristics. Continuous operating temperature is published at -65°F (-53.9°C) to 500°F (260°C). It should not be specified for service in elemental fluorine at temperature or service requiring elastic recovery.

Maintenance and OEM teams specify it across food and beverage, semiconductor fabrication, and pharmaceutical and biotech.

TFE373 ships individually. Nominal inside diameter is listed as 9 inch. Check the compound against your process media, pressure and temperature before committing to a design.