002 PTFE SOLID BACKUP RING FDA

APG stocks the TST002SO, an AS568-002 white PTFE (Teflon) 55 Shore D Back-Up Ring with an inside diameter of 0.042 in (1.07 mm), a cross section of 0.05 in (1.27 mm), and an outside diameter of 0.142 in (3.61 mm). A back-up ring bridges the extrusion gap so the primary seal holds its shape under load.

PTFE (Teflon) is known for a very wide continuous service temperature range and one of the lowest coefficients of friction of any solid. Expect good resistance to solvents, oxidizing media, and nearly all industrial chemicals. Service temperature is rated from -65°F (-53.9°C) through 500°F (260°C).

Common environments for this compound include laboratory equipment, chemical processing, and semiconductor fabrication.

Reference part number TST002SO when ordering; the item is sold individually. Nominal inside diameter is listed as 3/64 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.