Attention:

Certain features of Sigma-Aldrich.com will be down for maintenance the evening of Friday August 18th starting at 8:00 pm CDT until Saturday August 19th at 12:01 pm CDT.   Please note that you still have telephone and email access to our local offices. We apologize for any inconvenience.

Glassware Catalog

5.3mm O-Rings - Sigma-Aldrich Glassware Catalog


1.78mm Wall  •  2.6mm Wall  •  3.5mm Wall  •  5.3mm Wall


Viton A linear copolymer of vinylidene fluoride and hexafluoro-propylene;
good chemical resistance
Silicone Elastomer with high-temperature and ozone resistance
FETFE Fluoroelastomer with TFE additives and high chemical resistance
CAPFE A resilient rubber core encapsulated in non-porous FEP

O-ring measurement
  1. Measure the i.d. and wall thickness (mm)
    of the existing O-ring.
  2. Locate a replacement in the tables that follow.
  3. Ace Glass part numbers are provided for convenience.


Wall 5.3mm

I.d. (mm)
Viton
Catalog Number
Ace #
Silicone
Catalog Number
Ace #
43.8
-
-
7855-278
50.2
-
-
7885-283
72.4
7855-82
7855-282
78.7
7855-77
7855-277
88.3
7855-50
7855-250
94.6
7855-66
7855-266
110.5
7855-79
-
-
113.7
-
-
7855-287
145.4
-
-
7855-289

I.d. (mm)
FETFE
Catalog Number
Ace #
CAPFE
Catalog Number
Ace #
50.2
7855-783
7855-883
72.4
7855-782
-
-
78.7
7855-777
-
-
88.3
7855-750
7855-850
94.6
7855-766
-
-
110.5
7855-779
7855-879
113.7
7855-787
7855-887
145.4
-
-
7855-889
151.8
-
-
7855-861

Back to top