Page 129 - inside front cover

Technical
Dixon Powhatan 2007 11-4 1-800-355-1991
Nominal Dimensions of Standard Threads
ODM -- Outside Diameter of the Male IDF -- Inside Diameter of the Female TPI -- Threads Per Inch
NOTE: Female NPT (Tapered Pipe) thread is not available on hose swivel nuts.
GHT (3/4") -- 1.0625 ODM, 11-1/2 TPI
Thread Dimensions
Special Thread Information
Size PipeO.D.
1/8"
1/4"
3/8"
1/2"
3/4"
1"
1-1/4"
1-1/2"
2"
2-1/2"
3"
4"
4-1/2"
5"
6"
8"
10"
12"
.405
.504
.675
.840
1.050
1.315
1.660
1.900
2.375
2.875
3.500
4.500
5.563
6.625
8.625
10.750
12.750
TPI TPI
NPT BSPTr
27
18
18
14
14
11.5
11.5
11.5
11.5
8
8
8
8
8
8
8
8
28
19
19
14
14
11
11
11
11
11
11
11
11
11
Tapered
Threads
TPI ODM
(max)
NPSH
14
14
11.5
11.5
11.5
11.5
8
0.8248
1.0353
1.2951
1.6399
1.8788
2.3528
2.8434
Straight Threads
IDF
(min)
0.7395
0.9500
1.1921
1.5369
1.7758
2.2498
2.6930
TPI ODM
(max)
NPSM
27
18
18
14
14
11.5
11.5
11.5
11.5
8
8
8
8
8
0.397
0.526
0.662
0.823
1.034
1.293
1.638
1.877
2.351
2.841
3.467
4.466
5.528
6.585
IDF
(min)
0.358
0.468
0.603
0.747
0.958
1.201
1.546
1.785
2.259
2.708
3.334
4.333
5.395
6.452
TPI ODM
(max)
NST (NH)
8
8
9
7.5
6
4
4
4
4
1.375
1.375
1.990
3.068
3.623
5.010
5.760
6.260
7.025
IDF
(min)
1.2246
1.2246
1.8577
2.9104
3.5306
4.7111
5.4611
5.9602
6.7252
TPI ODM
(max)
BSPP
11
11
11
11
11
11
11
0.383
0.516
0.656
0.825
1.041
1.309
1.650
1.882
2.347
2.960
3.460
4.450
5.450
6.450
IDF
(min)
0.337
0.450
0.588
0.733
0.950
1.193
1.534
1.766
2.231
2.844
3.344
4.334
5.359
6.359
2½" thread
threads per inch
outside diameter
of male
6 7 7½ 8
3.058
3.062
3.093
3.125
3.156
3.187
3.234
3.250
3.312
(Pittsburgh)
3.125 2.990
3.062
3.125
(Chicago)
(NST)
(Detroit)
2.841
3.000
3.031
3.062
3.078
3.093
3.140
3.156
3.312
(NPSH)
(NY Corp)
(NYFD)
(Cleveland)