Drilling Standards for Rubber Expansion Joints

125/150# Standard/Special Drilling

Joint I.D. (inches) Flange O.D. Bolt Circle Number of Holes Hole Size Weights of Retaining Rings
1
1-1/4
4.25
4.625
3.125
3.5
4
4
.625
.625
1.9
2.4
1-1/2
2
5.0
6.0
3.875
4.75
4
4
.625
.75
2.6
3.6
2-1/2
3
7.0
7.5
5.5
6.0
4
4
.75
.75
5.3
5.6
3-1/2
4
8.5
9.0
7.0
7.5
8
8
.75
.75
6.5
7.3
5
6
10.0
11.0
8.5
9.5
8
8
.875
.875
7.9
9.1
8 13 11.75 8 .875 14.0
10
12
16.0
19.0
14.25
17.0
12
12
1.0
1.0
17.0
24.1
14
16
21.0
23.5
18.75
21.25
12
16
1.125
1.125
26.8
32.1
18
20
25.0
27.5
22.75
25.0
16
20
1.25
1.25
33.6
35.9
22
24
29.5
32.0
27.25
29.5
20
20
1.375
1.375
38.5
47.3
30
36
38.75
46.0
36.0
42.75
28
32
1.375
1.625
66.0
85.3


250/300# Standard/Special Drilling

Flange O.D. Bolt Circle Number of Holes Hole Diameter Weights of Retaining Rings
4.875
5.25
3.5
3.875
4
4
.750
.750
2.9
3.0
6.125
6.5
4.5
5.0
4
8
.875
.75
4.4
4.3
7.5
8.25
5.875
6.625
8
8
.875
.875
5.5
6.0
9.0
10.0
7.25
7.875
8
8
.875
.875
7.0
10.0
11.0
12.5
9.25
10.625
8
12
.875
.875
11.6
14.5
15.0 13.0 12 1.0 19.6
17.5
20.5
15.25
17.75
16
16
1.125
1.25
23.0
31.3
23.0
25.5
20.25
22.5
20
20
1.25
1.375
37.0
45.0
28.0
30.5
24.75
27.0
24
24
1.375
1.375
58.0
67.0
33.0
36.0
29.25
32.0
24
24
1.625
1.625
80.0
91.0
43.0
50.0
39.25
46.0
28
32
2.0
2.25
120.0
140.0


Navy Drilling Specifications

MIL-F-20042C-50LB
MIL-F-2042C-150LB
Bu Ships Drawing B-176

Joint Size (inches) O.D. (inches) B.C. Number of Holes Hole Diameter
1/4
3/8
1/2
3-1/4
3-3/8
3-9/16
2-1/8
2-1/4
2-7/16
3
3
3
9/16
9/16
9/16
3/4
1
1-1/4
3-13/16
4-1/4
4-1/2
2-11/16
3-1/8
3-3/8
4
4
4
9/16
9/16
9/16
1-1/2
2
2-1/2
5-1/16
5-9/16
6-1/8
3-15/16
4-7/16
5
6
6
6
9/16
9/16
9/16
3
3-1/2
4
6-5/8
7-3/16
7-11/16
5-1/2
6-1/16
6-9/16
8
8
8
9/16
9/16
9/16
4-1/2
5
5-1/2
8-3/16
9-1/16
9-9/16
7-1/16
7-13/16
8-5/16
10
10
10
9/16
11/16
11/16
6
6-1/2
7
10-1/8
10-5/8
11-5/16
8-7/8
9-3/8
10
12
12
12
11/16
11/16
11/16
7-1/2
8
8-1/2
11-7/8
12-3/8
12-15/16
10-9/16
11-1/16
11-5/8
12
14
14
11/16
11/16
11/16
9
9-1/2
10
13-15/16
14-1/2
15
12-3/8
12-15/16
13-7/16
14
14
15
11/16
11/16
11/16
11
12
14
15
16-9/16
17-5/8
19-1/8
25-1/8
15
16-1/16
17-3/8
18-3/8
16
18
19
20
13/16
13/16
15/16
15/16
16
18
20
21-3/16
23-1/4
25-13/16
19-7/16
21-1/2
23-13/16
20
22
24
15/16
15/16
1-1/16
22
24
25
27-7/8
30
31-1/2
25-7/8
28
29-1/4
26
28
29
1-1/16
1-1/16
1-3/16
26
28
30
32-9/16
34-11/16
36-13/16
30-5/16
32-7/16
34-9/16
30
32
35
1-3/16
1-3/16
1-3/16
32
33
34
39
40
41
36-3/4
37-3/4
38-3/4
36
36
36
1-3/16
1-3/16
1-3/16
35
36
38
40
42-7/8
43-7/8
46-1/8
48-1/8
40-3/8
41-3/8
43-5/8
45-5/8
36
36
36
36

1-5/16
1-5/16
1-5/16
1-5/16

42
46
50-1/4
54-1/2
47-3/4
52
38
40
1-5/16
1-5/16


Metric Drilling Data

View Metric Drilling Data

Valid XHTML 1.0 Transitional