MALE &
FEMALE
NPT SIZE
P

BASIC
ORDERING
NUMBER

MIN
OPENING
I

WRENCH
FLAT
F

L

S

1/16

-1-WPSC

0.12

1/2

0.86

0.88

1/8

-2-WPSC

0.19

9/16

1.04

0.87

1/4

-4-WPSC

0.28

3/4

1.17

1.17

3/8

-6-WPSC

0.38

7/8

1.42

1.26

1/2

-8-WPSC

0.47

1-1/16

1.56

1.56

3/4

-12-WPSC

0.62

1-5/16

1.92

1.67

1

-16-WPSC

0.88

1-1/2

1.91

1.94