Model

D(mm)

Range of hole d

Single(in)

Double(in)

ISO30-d

31.75

mm

6 8 10 12 14 16 18 20 25 32

in

3/16 5/16 3/8 1/2 5/8 3/4 7/8 1 1-1/4

3/8 1/2 5/8

ISO40-d

44.45

mm

6 8 10 12 14 16 18 20 25 32 40

in

3/16 5/16 3/8 1/2 5/8 3/4 7/8 1 1-1/4 1-1/2 2

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

ISO50-d

69.85

mm

6 8 10 12 14 16 18 20 25 32 40 42 50 63

in

3/16 5/16 3/8 1/2 5/8 3/4 7/8 1 1-1/4 1-1/2 2 2-1/2

3/4 7/8