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DQC414
877.963.4966 •
dixonvalve.com
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Male / Female Pipe (NPTF) Thread Identification
Male Pipe Thread Gauge
•
stand pipe thread vertically on diagram
•
align outside diameter of pipe thread with matching circle
•
read nominal pipe size directly above circle
Example: ¾ male pipe
(
Dixon end size = 6)
Female Pipe Thread Gauge
•
hold pipe thread against scale on edge of page
•
align one side of pipe thread with illustration base line
•
read nominal pipe size directly from scale
Example: ¾ female pipe
(
Dixon end size = 6)
Base line for
all sizes
3/4
1/8
1/4
3/8
1/2
1
1-1/4
1-1/2
2
2-1/2
3
Nominal
Pipe
Size (inches)
Dixon
End
Size
Nominal
Thread
Size (inches)
Nominal
Pipe
Size (inches)
1/8
1/4
3/8
1/2
3/4
1
1-1/4
1-1/2
2
2-1/2
3
1
2
3
4
6
8
10
12
16
20
24
1/8 - 27
1/4 - 18
3/8 - 18
1/2 - 14
3/4 - 14
1-11-1/2
1-1/4 - 11-1/2
1-1/2 - 11-1/2
2 - 11-1/2
2-1/2 - 8
3 - 8
0.41
0.54
0.68
0.84
1.05
1.32
1.66
1.90
2.38
2.88
3.50