MIL-PRF-20042E
TABLE XI.
Machining details for type PR, 100-, 150-, 250- and 400-
pound flanges, standard size. 4/
NPS
O.D.
O 1/
N
M
Minimum
Minimum
Minimum
Minimum
Inches
Inches
Inch
Inch
Inch
Inches
0.639
0.614
0.078
0.068
0.100
0.540
1/4
.784
.764
.093
.083
.117
.675
3/8
.949
.929
.093
.083
.149
.840
1/2
1.179
1.159
.109
.099
.154
1.050
3/4
1.444
1.424
.140
.130
.154
1.315
1
1.789
1.769
.140
.130
.185
1.660
1-1/4
2.031
2.011
.202
.192
.217
1.900
1-1/2
2.506
2.486
.202
.192
.232
2.375
2
3.008
2.988
.202
.192
.217
2.875
2-1/2
3.633
3.613
.265
.255
.185
3.500
3
4.133
4.113
.265
.255
.217
4.000
3-1/2
4.693
4.673
.265
.255
.217
4.500
4
5.193
5.173
.265
.255
.217
5.000
2/
4-1/2
5.756
5.736
.265
.255
.217
5.563
5
6.318
6.298
.265
.255
.248
6.125
2/
5-1/2
6.818
6.798
.265
.255
.248
6.625
6
7.818
7.798
.330
.320
.247
7.625
2/
7
8.818
8.798
.408
.398
.270
8.625
8
9.818
9.798
.408
.398
.301
9.625
2/
9
10.943
10.923
.408
.398
.333
10.750
10
11.983
11.963
.408
.398
.364
11.750
2/3/
11
12.983
12.963
.408
.398
.426
12.750
3/
12
1/
For
tolerance see 3.6.3.
2/
Not
for 250-pound flange.
3/
Not
for 400-pound flange.
4/
See
figure 1.
14
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