Glassware Catalog

2.6mm 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 2.6mm

I.d. (mm)
Viton
Catalog Number
Ace #
Silicone
Catalog Number
Ace #
3.6
7855-03
7855-203
5.2
7855-09
7855-209
6.0
7855-11
7855-211
9.2
7855-16
7855-216
10.2
7855-18
7855-218
12.4
7855-20
7855-220
13.9
7855-21
7855-221
15.5
7855-22
7855-222
17.1
7855-24
7855-224
18.7
7855-26
7855-226
21.9
7855-70
7855-270
26.6
7855-27
7855-227
28.2
7855-71
7855-271
29.8
7855-28
7855-228
33.0
7855-72
7855-272
36.2
7855-76
7855-276
37.8
7855-73
7855-273
50.5
7855-29
7855-229

I.d. (mm)
FETFE
Catalog Number
Ace #
CAPFE
Catalog Number
Ace #
3.6
7855-703
-
-
5.2
7855-709
-
-
6.0
7855-711
-
-
9.2
7855-716
7855-816
10.2
7855-718
7855-818
12.4
7855-720
7855-820
13.9
7855-721
7855-821
15.5
7855-722
7855-822
17.1
7855-724
7855-824
18.7
7855-726
7855-826
21.9
7855-770
7855-870
26.6
7855-727
7855-827
28.2
7855-771
7855-871
29.8
7855-728
7855-828
33.0
7855-772
7855-872
36.2
7855-776
7855-876
37.8
7855-773
7855-873
50.5
7855-729
7855-829

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