Size

Decimal Equiv. (in.)

Flute Length (in.)

Overall Length (in.)

Morse Taper No.

3/8

.3750

2-3/4

5-11/16

1

7/16

.4375

4-3/8

8-1/4

2

1/2

.5000

5-1/8

9

2

9/16

.5625

5-1/8

9

2

5/8

.6250

6-1/8

10

2

11/16

.6875

7-1/8

11-3/4

3

3/4

.7500

7-3/8

12

3

13/16

.8125

7-3/8

12

3

7/8

.8750

7-3/8

12

3

15/16

.9375

7-3/8

12

3

1

1.0000

7-3/8

12

3

1-1/16

1.0625

7-3/8

12

3

1-1/8

1.1250

7-3/8

12

4

1-1/4

1.2500

7-3/8

13

4

1-3/8

1.3750

7-3/8

13

4

1-1/2

1.5000

7-3/8

13

4