107 PTFE SOLID BACKUP RING FDA

APG stocks the TST107SO, an AS568-107 white PTFE (Teflon) 55 Shore D Back-Up Ring measuring an inside diameter of 0.206 in (5.23 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 0.412 in (10.46 mm). A back-up ring bridges the extrusion gap so the primary seal holds its shape under load.

Expect good resistance to solvents, nearly all industrial chemicals, and strong acids and bases. PTFE (Teflon) is valued for one of the lowest coefficients of friction of any solid and non-stick, non-contaminating surface characteristics. 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 elemental fluorine at temperature.

Maintenance and OEM teams specify it across semiconductor fabrication, pharmaceutical and biotech, and chemical processing.

Stocked as TST107SO and sold individually. Nominal inside diameter is listed as 7/32 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.