568-266 PTFE ORINGS FDA

APG stocks the TFE266, an AS568-266 white PTFE (Teflon) 55 Shore D O-Ring built to an inside diameter of 7.984 in (202.79 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 8.262 in (209.85 mm). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

The compound resists solvents, strong acids and bases, and nearly all industrial chemicals. That behavior comes from the compound itself: PTFE (Teflon) is known for non-stick, non-contaminating surface characteristics and one of the lowest coefficients of friction of any solid. 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.

It sees regular use in laboratory equipment, semiconductor fabrication, and food and beverage.

Reference part number TFE266 when ordering; the item is sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.