Ordered as TFE387, this is an AS568-387 white PTFE (Teflon) 55 Shore D O-Ring built to an inside diameter of 17.955 in (456.06 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 18.375 in (466.73 mm). The o-ring delivers dependable bidirectional sealing in a compact groove envelope.
PTFE (Teflon) is valued for excellent dielectric properties and non-stick, non-contaminating surface characteristics. It resists steam, nearly all industrial chemicals, and oxidizing media. Service temperature is rated from -65°F (-53.9°C) through 500°F (260°C). It should not be specified for service in elemental fluorine at temperature or service requiring elastic recovery.
You will find this material specified across food and beverage, semiconductor fabrication, and pharmaceutical and biotech.
Stocked as TFE387 and sold individually. Nominal inside diameter is listed as 18 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.
Description 568-387 PTFE ORINGS FDA
Actual Cross Section 0.21 inch (5.33 mm)
Actual Inside Diameter 17.955 inch (456.06 mm)
Actual Outside Diameter 18.375 inch (466.73 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Premium