568-239 PTFE ORINGS FDA

Part number TFE239 is an AS568-239 white PTFE (Teflon) 55 Shore D O-Ring measuring an inside diameter of 3.609 in (91.67 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.887 in (98.73 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

The material holds up against nearly all industrial chemicals, strong acids and bases, and steam. That behavior comes from the compound itself: PTFE (Teflon) offers 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 molten alkali metals or service requiring elastic recovery.

Common environments for this compound include chemical processing, pharmaceutical and biotech, and laboratory equipment.

Order part number TFE239, sold individually. Nominal inside diameter is listed as 3 5/8 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.