A(OD)

B(ID)

C(Lenght of Slot)

D(Length under head)

No slots

3/4

1/4 5/16 3/8 1/2

1-1/2

2

1

1

1/4 5/16 3/8 1/2 5/8  3/4

2-3/8

2-3/4

1

1-1/4

3/8 1/2 5/8 3/4 7/8  1

2-3/4

3-1/4

1

1-1/2

3/8 1/2 5/8 3/4 7/8  1 1-1/4

3

3-3/8

1

1-3/4

1/2 5/8 3/4 7/8  1 1-1/4  1-1/2

3-1/8

3-1/2

1

2

1/2  5/8 3/4 1 1-1/4  1-1/2 1-3/4

3-5/8

4

1

2-1/2

3/4 1 1-1/4 1-1/2 1-3/4 2 2-1/4

4-1/8

4-1/2

1 or 2

3

1 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2

4-5/8

5

1 or 2

3-1/2

1 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 3

5

5-3/4

1 or 2