MALE
NPT
SIZE
P

FEMALE
NPT
SIZE
P1

BASIC
ORDERING
NUMBER

A

MIN
OPENING
E

HEX
FLAT
H

1/8

1/16

-2-WRB-1

1.03

.19

7/16

1/4

1/8

-4- WRB -2

1.06

.28

9/16

3/8

1/8

-6- WRB -2

.86

.34

11/16

3/8

1/4

-6- WRB -4

1.19

.38

3/4

1/2

1/8

-8- WRB -2

1.08

.34

7/8

1/2

1/4

  -8- WRB -4

1.08

.45

7/8

1/2

3/8

  -8- WRB -6

1.41

.47

7/8

3/4

1/4

 -12- WRB -4

1.08

.45

1.1/16

3/4

3/8

 -12- WRB -6

1.08

.59

1.1/16

3/4

1/2

-12- WRB -8

1.63

.52

1.1/16

1

1/4

-16- WRB -4

1.37

.45

1.3/8

1

3/8

-16- WRB -6

1.37

.59

1.3/8

1

1/2

-16- WRB -8

1.37

.73

1.3/8

1

3/4

-16- WRB-12

1.85

.88

1.3/8