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252 PTFE SOLID BACKUP RING FDA

PTFE Back-Up Ring, 5.234 in ID x 0.139 CS, 55D, White, -65 to 500°F

Picture of 252 PTFE SOLID BACKUP RING FDA
Status
Out of Stock
Est. Ship Date
16 Feb 2027
Material
PTFE (Polytetrafluoroethylene)
Dash Size
252
Durometer
55 Shore D
Cross Section Type
Round
Color
White
Minimum Temperature
-65°F (-53.9°C)
Maximum Temperature
500°F (260°C)
Nominal Cross Section
1/8 inch
Nominal Inside Diameter
5 1/4 inch
Nominal Outside Diameter
5 1/2 inch
Unit of Measure
EA
SKU:
TST252SO
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Product Specification

-
Part number TST252SO is an AS568-252 white PTFE (Teflon) 55 Shore D Back-Up Ring measuring an inside diameter of 5.234 in (132.94 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 5.512 in (140 mm). A back-up ring bridges the extrusion gap so the primary seal holds its shape under load.

PTFE (Teflon) is specified here for near-universal chemical inertness and non-stick, non-contaminating surface characteristics. This material stands up to 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).

It sees regular use in aggressive-media pipelines, chemical processing, and food and beverage.

TST252SO ships individually. Nominal inside diameter is listed as 5 1/4 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.
Item
TST252SO
Description
252 PTFE SOLID BACKUP RING FDA
Actual Cross Section
0.139 inch (3.53 mm)
Actual Inside Diameter
5.234 inch (132.94 mm)
Actual Outside Diameter
5.512 inch (140 mm)
FDA Compliant
No
Measurement System
Imperial
Metal Detectable
No
NSF Certified
No
Product Code
6002
Product Category
O-Rings - Backup Rings