To Tap This Size Screw Or Bolt:

Use This Drill Bit:

Closest Fractional

Decimal Inches

0-80 NF

3/64"

3/64"

.0469

1-64 NC

#53

-

.0595

1-72 NF

#53

1/16"

.0595

2-56 NC

#50

-

.0700

2-64 NF

#50

-

.0700

3-48 NC

#47

5/64"

.0785

3-56 NF

#45

-

.0820

4-36 NS

#44

-

.0860

4-40 NC

#43

3/32"

.0890

4-48 NF

#42

3/32"

.0935

3mm-.060mm

2.5mm

-

.0984

1/8-40 NS

#38

-

.1015

5-40 NC

#38

-

.1015

5-44 NF

#37

-

.1040

6-32 NC

#35

7/64"

.1100

6-36 NS

#34

-

.1110

6-40 NF

#33

-

.1130

6-48 NS

#31

-

.1200

4mm-0.70mm

3.4mm

-

.1338

4mm-.075mm

3.4mm

-

.1338

8-32 NC

#29

-

.1360

8-36 NF

#29

9/64"

.1360

8-40 NS

#28

-

.1405

3/16-24 NS

#26

-

.1470

10-24 NC

#25

5/32"

.1495

3/16-32 NS

#22

-

.1570

10-32 NF

#21

5/32"

.1590

5mm-.090mm

4.2mm

-

.1653

5mm-.080mm

4.3mm

-

.1693

12-24 NC