Size

From

To

TPI

TPF

Spec 5B (Plug/Ring)

Casing - Round

4 1/2

13 3/8

8

3/4

Line Pipe

1/8

13 3/8

8-27

3/4

Tubing - Non Upset

Tubing - External Upset

Tubing - Integral Joint

 4 1/2

 8

  3/4 

Extreme Line Casing

Spec 7 (Plug/Ring)

NC Connections

2 3/8

5 1/2

4

2

Other Oil Field Related Connections (Plug/Ring)

H-90

2 3/8

8 5/8

3-3 1/2

1 1/4, 2, 3

Slim Hole

2 3/8

4

2

Extra Hole

2 7/8

5

4

2

Wide Open

2 3/8

4

2

AOH

2 3/8

4 1/2

4

1 1/2

PAC

2 3/8

3 1/2

4

1 1/2

XHole

2 7/8

3 1/2

4

2

Spec 11B

Sucker Rods B1 to B6

1/2

1 1/8

10

Sucker Rods P1 to P8

1/2

1 1/8

10

Specials

Mining: BECO, DI-22, DI-42

American National Special Threads

Tapered Thread Gages - AWWA