API SPEC 7-2 NUMBERED CONNECTIONS (N.C.) WORKING/MASTER/TAPER GAGES

SIZE

T.P.I

T.P.F

THD FORM

TAPER

ANGLE

NC10

6

1-1/2

V-0.055R

1:8

60°

NC12

6

1-1/2

V-0.055R

1:8

NC13

6

1-1/2

V-0.055R

1:8

NC16

6

1-1/2

V-0.055R

1:8

NC23

4

2

V-0.38R

1:6

NC26(2 3/8IF)

4

2

V-0.38R(V-0.065)

1:6

NC31(2 7/8IF)

4

2

V-0.38R(V-0.065)

1:6

NC35

4

2

V-0.38R

1:6

NC38(3 1/2IF)

4

2

V-0.38R(V-0.065)

1:6

NC40(4FH)

4

2

V-0.38R(V-0.065)

1:6

NC44

4

2

V-0.38R(V-0.065)

1:6

NC46(4 IF)

4

2

V-0.38R(V-0.065)

1:6

NC50(4 1/2IF) (5 X.H)

4

2

V-0.38R

1:6

NC56

4

3

V-0.38R

1:4

NC61

4

3

V-0.38R

1:4

NC70

4

3

V-0.38R

1:4

NC77

4

3

V-0.38R

1:4