113 PTFE SOLID BACKUP RING FDA

Part number TST113SO is an AS568-113 white PTFE (Teflon) 55 Shore D Back-Up Ring measuring an inside diameter of 0.549 in (13.94 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 0.755 in (19.18 mm). A back-up ring bridges the extrusion gap so the primary seal holds its shape under load.

This material stands up to oxidizing media, strong acids and bases, and nearly all industrial chemicals. PTFE (Teflon) is valued for excellent dielectric properties and non-stick, non-contaminating surface characteristics. Published continuous service range is -65°F (-53.9°C) to 500°F (260°C). Exposure to elemental fluorine at temperature or service requiring elastic recovery will shorten service life.

Maintenance and OEM teams specify it across semiconductor fabrication, aggressive-media pipelines, and food and beverage.

Stocked as TST113SO and sold individually. Nominal inside diameter is listed as 9/16 inch. Check the compound against your process media, pressure and temperature before committing to a design.