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Fittings \ Tube Fittings \ Tube to Tube Union \ Bulkhead Union

Bulkhead Union (CBU)


Connects Fractional Tubes

Part
Number
Dim.
A
Dim.
B
Min. d Dim.
L
Dim.
I
Dim.
I1
Dim.
L1
Tube O.D.
(D)
Width Across
Flat H
Width Across
Flat h
Width Across
Flat h1
CBU-1 8.63 10.92 1.27 31.50 23.87 13.46 17.27 1/16"
1.58
5/16"
7.93
5/16"
7.93
5/16"
7.93
CBU-2 12.70 15.24 2.28 51.30 38.10 24.63 31.24 1/8"
3.17
7/16"
11.11
1/2"
12.70
1/2"
12.70
CBU-3 13.71 16.00 3.04 53.59 40.38 25.4 32.00 3/16"
4.76
1/2"
12.70
9/16"
14.28
9/16"
14.28
CBU-4 15.24 17.78 4.82 57.65 42.92 26.16 33.52 1/4"
6.35
9/16"
14.28
5/8"
15.87
5/8"
15.87
CBU-5 16.25 18.54 6.35 60.70 45.97 28.44 35.81 5/16"
7.93
5/8"
15.87
11/16"
17.46
11/16"
17.46
CBU-6 16.76 19.30 7.11 62.23 47.49 29.46 36.83 3/8"
9.52
11/16"
17.46
3/4"
19.05
3/4"
19.05
CBU-8 22.86 21.84 10.41 71.12 50.80 31.75 41.91 1/2"
12.70
7/8"
22.22
15/16"
23.81
15/16"
23.81
CBU-10 24.38 21.84 12.70 72.64 52.32 32.51 42.67 5/8"
15.87
1"
25.40
1 1/16"
26.98
1 1/16"
26.98
CBU-12 24.38 21.84 15.74 78.99 58.67 37.33 47.49 3/4"
19.05
1 1/8"
28.57
1 3/16"
30.16
1 3/16"
30.16
CBU-14 25.90 21.84 18.28 84.58 64.26 42.92 53.08 7/8"
22.22
1 1/4"
31.75
1 3/8"
34.92
1 3/8"
34.92
CBU-16 31.24 26.41 22.35 95.75 71.37 45.21 57.40 1"
25.40
1 1/2"
38.10
1 5/8"
41.27
1 5/8"
41.27
CBU-20 41.14 38.86 27.68 123.19 78.99 47.75 69.85 1 1/4"
31.75
1 7/8"
47.62
1 7/8"
47.62
1 7/8"
47.62
CBU-24 50.03 45.21 34.03 139.19 84.83 49.27 76.45 1 1/2"
38.10
2 1/4"
57.15
2 1/4"
57.15
2 1/4"
57.15
CBU-32 67.56 62.73 45.97 180.34 105.66 56.38 93.72 2"
50.80
3"
76.20
2 3/4"
69.85
2 3/4"
69.85

Connects Metric Tubes

Part
Number
Dim.
A
Dim.
B
Min. d Dim.
L
Dim.
I
Dim.
I1
Dim.
L1
Tube O.D.
(D)
Width Across
Flat H
Width Across
Flat h
Width Across
Flat h1
CBU-3M 12.9 15.3 2.4 51.3 38.1 24.6 31.2 3 12 14 12.7
CBU-4M 13.7 16.1 2.4 53.6 40.4 25.4 32.0 4 12 14 14.3
CBU-6M 15.3 17.7 4.8 57.7 42.9 26.2 33.6 6 14 16 15.9
CBU-8M 16.2 18.6 6.4 61.0 46.0 28.6 36.1 8 16 18 17.5
CBU-10M 17.2 19.5 7.9 63.7 48.5 29.4 37.0 10 19 22 22.0
CBU-12M 22.8 22.0 9.5 71.0 50.8 31.8 41.9 12 22 24 23.8
CBU-15M 24.4 22.0 11.9 72.5 52.3 32.5 42.6 15 25 27 27.0
CBU-16M 24.4 22.0 12.7 72.5 52.3 32.5 42.6 16 25 27 27.0
CBU-18M 24.4 22.0 15.1 78.9 58.7 37.3 47.4 18 30 30 30.0
CBU-20M 26.0 22.0 15.9 84.5 64.3 42.9 53.0 20 32 35 35.0
CBU-22M 26.0 22.0 18.3 84.5 64.3 42.9 53.0 22 32 35 35.0
CBU-25M 31.3 26.5 21.8 95.9 71.4 45.2 57.5 25 38 41.3 41.3
CBU-32M 42.0 41.6 28.6 128.3 82.3 49.5 72.5 32 50 50 50.0
CBU-38M 49.4 47.9 33.7 144.6 89.4 51.5 79.1 38 60 60 60.0
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