568-349 PTFE ORINGS FDA

Ordered as TFE349, this is an AS568-349 white PTFE (Teflon) 55 Shore D O-Ring measuring an inside diameter of 4.475 in (113.67 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.895 in (124.33 mm). The o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

The compound resists nearly all industrial chemicals, solvents, and oxidizing media. That behavior comes from the compound itself: PTFE (Teflon) delivers non-stick, non-contaminating surface characteristics and near-universal chemical inertness. 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.

Typical settings include chemical processing, laboratory equipment, and semiconductor fabrication.

This item is sold individually under part number TFE349. Nominal inside diameter is listed as 4 1/2 inch. Check the compound against your process media, pressure and temperature before committing to a design. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.