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4

DQC116

877.963.4966 •

dixonvalve.com

General Product Information

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