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2103-436 PTFE S/T BUP FDA

PTFE Back-Up Ring, 5.85 in ID x 0.275 CS, 55D, White, -65 to 500°F

Picture of 2103-436 PTFE S/T BUP FDA
Status
Available
Est. Ship Date
31 Oct 2026
Material
PTFE (Polytetrafluoroethylene)
Dash Size
436
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
1/4 inch
Nominal Inside Diameter
5 7/8 inch
Nominal Outside Diameter
6 3/8 inch
Unit of Measure
EA
SKU:
TST436
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Product Specification

-
The TST436 is an AS568-436 white PTFE (Teflon) 55 Shore D Back-Up Ring with an inside diameter of 5.85 in (148.59 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 6.4 in (162.56 mm). This back-up ring bridges the extrusion gap so the primary seal holds its shape under load.

PTFE (Teflon) delivers non-stick, non-contaminating surface characteristics and a very wide continuous service temperature range. This material stands up to nearly all industrial chemicals, steam, and oxidizing media. Service temperature is rated from -65°F (-53.9°C) through 500°F (260°C).

It sees regular use in laboratory equipment, food and beverage, and semiconductor fabrication.

Stocked as TST436 and sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation.
Item
TST436
Description
2103-436 PTFE S/T BUP FDA
Actual Cross Section
0.275 inch (6.99 mm)
Actual Inside Diameter
5.85 inch (148.59 mm)
Actual Outside Diameter
6.4 inch (162.56 mm)
FDA Compliant
No
Measurement System
Imperial
Metal Detectable
No
NSF Certified
No
Product Code
6002
Product Category
O-Rings - Backup Rings