568-437 PTFE ORINGS FDA

APG stocks the TFE437, an AS568-437 white PTFE (Teflon) 55 Shore D O-Ring built to an inside diameter of 5.975 in (151.77 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 6.525 in (165.74 mm). An o-ring delivers dependable bidirectional sealing in a compact groove envelope.

PTFE (Teflon) is known for non-stick, non-contaminating surface characteristics and near-universal chemical inertness. Expect good resistance to steam, oxidizing media, and solvents. Service temperature is rated from -65°F (-53.9°C) through 500°F (260°C). Exposure to elemental fluorine at temperature or molten alkali metals will shorten service life.

You will find this material specified across laboratory equipment, aggressive-media pipelines, and chemical processing.

This item is sold individually under part number TFE437. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.