324 PTFE SOLID BACKUP RING FDA

Part number TST324SO is an AS568-324 white PTFE (Teflon) 55 Shore D Back-Up Ring with an inside diameter of 1.35 in (34.29 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.77 in (44.96 mm). A back-up ring extends o-ring service life by supporting the seal against extrusion under high pressure.

PTFE (Teflon) is specified here for non-stick, non-contaminating surface characteristics and one of the lowest coefficients of friction of any solid. The compound resists nearly all industrial chemicals, steam, and strong acids and bases. Service temperature is rated from -65°F (-53.9°C) through 500°F (260°C).

Maintenance and OEM teams specify it across laboratory equipment, food and beverage, and aggressive-media pipelines.

This item is sold individually under part number TST324SO. 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.