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Safety &
Technical
P
942
DPL418
877.963.4966 •
dixonvalve.comP
Thread Dimensions
Nominal Dimensions of Standard Threads
Normal Engagement Length of NPT Thread in Inches (A)
•
Dimensions given do not allow for variations in tapping or threading.
Size Pipe
OD
Tapered
Threads
Straight Threads
NPT BSPTr
NPSH
NPSM
NST (NH)
BSPP
TPI
TPI
TPI
ODM
(max)
IDF
(min)
TPI
ODM
(max)
IDF
(min)
TPI ODM
(max)
IDF
(min)
TPI ODM
(max)
IDF
(min)
⅛"
.405 27.0 28
27.0 0.397 0.358
0.383 0.337
¼"
.540 18.0 19
18.0 0.526 0.468
0.516 0.450
⅜"
.675 18.0 19
18.0 0.662 0.603
0.656 0.588
½"
.840 14.0 14 14.0 0.8248 0.7395 14.0 0.823 0.747
0.825 0.733
¾"
1.050 14.0 14 14.0 1.0353 0.9500 14.0 1.034 0.958
1.041 0.950
1"
1.315 11.5 11 11.5 1.2951 1.1921 11.5 1.293 1.201 8.0 1.375 1.2246 11 1.309 1.193
1¼"
1.660 11.5 11 11.5 1.6399 1.5369 11.5 1.638 1.546
11 1.650 1.534
1½"
1.900 11.5 11 11.5 1.8788 1.7758 11.5 1.877 1.785 9.0 1.990 1.8577 11 1.882 1.766
2"
2.375 11.5 11 11.5 2.3528 2.2498 11.5 2.351 2.259
11 2.347 2.231
2½"
2.875 8.0 11 8.0 2.8434 2.6930 8.0 2.841 2.708 7.5 3.068 2.9104 11 2.960 2.844
3"
3.500 8.0 11
8.0 3.467 3.334 6.0 3.623 3.5306 11 3.460 3.344
4"
4.500 8.0 11
8.0 4.466 4.333 4.0 5.010 4.7111 11 4.450 4.334
4½"
4.0 5.760 5.4611
5"
5.563 8.0 11
8.0 5.528 5.395 4.0 6.260 5.9602 11 5.450 5.359
6"
6.625 8.0 11
8.0 6.585 6.452 4.0 7.025 6.7252 11 6.450 6.359
8"
8.625 8.0
10" 10.750 8.0
12" 12.750 8.0
Thread Size
Dimension A
1/8"
1/4"
1/4"
3/8"
3/8"
3/8"
1/2"
1/2"
3/4"
9/16"
1"
11/16"
1-1/4"
11/16"
1-1/2"
11/16"
2"
3/4"
2-1/2"
15/16"
3"
1"
4"
1-1/8"
5"
1-1/4"
6"
1-5/16"
8"
1-7/16"
10"
1-5/8"
12"
1-3/4"
•
ODM = Outside Diameter of the male
•
IDF = Inside Diameter of the female
•
TPI = Threads Per Inch
•
GHT (¾") -- 1.0625 ODM, 11-½ TPI
•
Female NPT (Tapered Pipe) thread is not available on hose swivel nuts
Thread Information