Part
Number

Tube
O.D.

Pipe
I.P.S.

Pipe
Coupling

Electrical
Conduit

A
Inside
Diameter

A
Range Of
 Diameter

B
Panel
Hole

C
Outside
Diameter

250

1/4

0.250 - 0.265

7/8

1-3/16

375

3/8

1/8

0.350

0.375 - 0.405

1-1/16

1-3/8

375-C

3/8

1/8

0.360

0.375 - 0.400

1-1/4

1-9/16

500

1/2

1/4

0.475

0.500 - 0.559

1-1/4

1-9/16

560

5/8

1/8

3/8

0.560

0.580 - 0.634

1-1/4

1-9/16

635

3/8

1/4

1/2

0.604

0.635 - 0.719

1-3/8

1-11/16

720

3/4

0.685

0.720 - 0.824

1-1/2

1-13/16

825

7/8

1/2

3/8

0.775

0.825 - 0.919

1-5/8

920

1

3/4

0.860

0.920 - 1.019

1-3/4

2-1/8

1020

3/4

1/2

0.970

1.020 - 1.109

2

2-7/16

1020-T

7/8

1/2

3/8

0.775

0.825 - 0.919

2

2-7/16

1110

1-1/8

1

1.050

1.110 - 1.199

2-1/8

2-5/8

1300

1-3/8

1

3/4

1.235

1.300 - 1.399

2-3/8

2-7/8

1

1-1/4

1.422

1.500 - 1.624

2-1/2

3

1625

1-5/8

1-1/4

1-1/2

1.520

1.625 - 1.750

2-5/8

3-1/8

1875

1-1/2

1-1/4

1.755

1.875 - 2.000

2-7/8

3-3/8

2000

2-1/8

1-1/4X

1.870

2.000 - 2.125

3

3-1/2

1-1/2

2

1.985

2.125 - 2.250

3-1/8

3-5/8

2250

2

1-1/2X

2.100

2.250 - 2.375

3-1/4

3-3/4

2375

2

2.220

2.375 - 2.500

3-1/2

4

2500

2-5/8

2.340

2.500 - 2.625

3-5/8

4-1/8

2625

2

2.470

2.625 - 2.750

3-3/4

4-1/4

2875

2-1/2

2X

2.695

2.875 - 3.000

4

4-1/2

3125

3-1/8

2-1/2

2.895

3.125 - 3.250

4-1/4

4-3/4

3375

3

2-1/2X

3.250

3.375 - 3.500

4-7/8

5-3/8

3625

3-5/8

3.375

3.625 - 3.750

4-7/8

5-3/8

4000

4-1/8

3-1/2

3

3.750

4.000 - 4.125

5-3/4

6-1/4

4500

4

3X

4.250

4.500 - 4.625

6-1/4

6-3/4