DRILL SIZES
For Number, Letter, Fractional, and Metric Drills
 

     DIAM.

 

     DIAM.

 

     DIAM.

 

     DIAM.

 

     DIAM.

DRILL

INCHES

DRILL

INCHES

DRILL

INCHES

DRILL

INCHES

DRILL

INCHES

 

 

 

 

 

 

 

 

 

 

80

.0135

2.1m/m

.0827

16

.1770

  9/32

.2812

12.m/m

.4724

79

.0145

44

.0860

4.5m/m

.1772

7.2m/m

.2835

 31/64

.4844

  1/64

.0156

2.2m/m

.0866

15

.1800

7.3m/m

.2874

12.5m/m

.4921

78

.0160

2.25m/m

.0886

4.6m/m

.1811

L

.2900

 1/2

.5000

77

.0180

43

.0890

14

.1820

7.4m/m

.2913

13.m/m

.5118

 

 

 

 

 

 

 

 

 

.5m/m

.0197

2.3m/m

.0906

13

.1850

M

.2950

 33/64

.5156

76

.0200

42

.0935

4.7m/m

.1850

7.5m/m

.2953

 17/32

.5312

75

.0210

  3/32

.0938

  3/16

.1875

 19/64

.2969

13.5m/m

.5315

74

.0225

2.4m/m

.0945

4.8m/m

.1890

7.6m/m

.2992

 35/64

.5469

.6m/m

.0236

41

.0960

12

.1890

N

.3020

14.m/m

.5512

 

 

 

 

 

 

 

 

 

73

.0240

40

.0980

11

.1910

7.7m/m

.3031

  9/16

.5625

72

.0250

2.5m/m

.0984

4.9m/m

.1929

7.8m/m

.3071

14.5m/m

.5709

71

.0260

39

.0995

10

.1935

7.9m/m

.3110

 37/64

.5781

.7m/m

.0276

38

.1015

9

.1960

  5/16

.3125

15.m/m

.5906

70

.0280

2.6m/m

.1024

5.m/m

.1969

8.m/m

.3150

 19/32

.5938

 

 

 

 

 

 

 

 

 

69

.0292

37

.1040

8

.1990

O

.3160

 39/64

.6094

.75m/m

.0295

2.7m/m

.1063

5.1m/m

.2008

8.1m/m

.3189

15.5m/m

.6102

68

.0310

36

.1065

7

.2010

8.2m/m

.3228

 5/8

.6250

  1/32

.0312

 

 

 13/64

.2031

P

.3230

16.m/m

.6299

.8m/m

.0315

  7/64

.1094

6

.2040

8.3m/m

.3268

 41/64

.6406

 

 

 

 

 

 

 

 

 

67

.0320

35

.1100

5.2m/m

.2047

 21/64

.3281

16.5m/m

.6496

66

.0330

2.8m/m

.1102

5

.2055

8.4m/m

.3307

 21/32

.6562

65

.0350

34

.1110

5.3m/m

.2087

Q

.3320

17.m/m

.6693

.9m/m

.0354

33

.1130

4

.2090

8.5m/m

.3346

 43/64

.6719

64

.0360

2.9m/m

.1142

5.4m/m

.2126

8.6m/m

.3386

 11/16

.6875

 

 

 

 

 

 

 

 

 

63

.0370

32

.1160

3

.2130

R

.3390

17.5m/m

.6890

62

.0380

3.m/m

.1181

5.5m/m

.2165

8.7m/m

.3425

 45/64

.7031

61

.0390

31

.1200

  7/32

.2188

 11/32

.3438

18.m/m

.7087

1.m/m

.0394

3.1m/m

.1220

5.6m/m

.2205

8.8m/m

.3465

 23/32

.7188

60

.0400

 1/8

.1250

2

.2210

S

.3480

18.5m/m

.7283

 

 

 

 

 

 

 

 

 

59

.0410

3.2m/m

.1260

5.7m/m

.2244

8.9m/m

.3504

 47/64

.7344

58

.0420

30

.1285

1

.2280

9.m/m

.3543

19.m/m

.7480

57

.0430

3.3m/m

.1299

5.8m/m

.2283

T

.3580

 3/4

.7500

1.1m/m

.0433

3.4m/m

.1339

5.9m/m

.2323

9.1m/m

.3583

 49/64

.7656

56

.0465

29

.1360

A

.2340

 23/64

.3594

19.5m/m

.7677

 

 

 

 

 

 

 

 

 

  3/64

.0469

3.5m/m

.1378

 15/64

.2344

9.2m/m

.3622

 25/32

.7812

1.2m/m

.0472

28

.1405

6.m/m

.2362

9.3m/m

.3661

20.m/m

.7874

1.25m/m

.0492

  9/64

.1406

B

.2380

U

.3680

 51/64

.7969

1.3m/m

.0512

3.6m/m

.1417

6.1m/m

.2402

9.4m/m

.3701

20.5m/m

.8071

55

.0520

27

.1440

C

.2420

9.5m/m

.3740

 13/16

.8125

 

 

 

 

 

 

 

 

 

54

.0550

3.7m/m

.1457

6.2m/m

.2441

 3/8

.3750

21.m/m

.8268

1.4m/m

.0551

26

.1470

D

.2460

V

.3770

 53/64

.8281

1.5m/m

.0591

25

.1495

6.3m/m

.2480

9.6m/m

.3780

 27/32

.8438

53

.0595

3.8m/m

.1496

E

.2500

9.7m/m

.3819

21.5m/m

.8465

  1/16

.0625

24

.1520

 1/4

.2500

9.8m/m

.3858

 55/64

.8594

 

 

 

 

 

 

 

 

 

1.6m/m

.0630

3.9m/m

.1535

6.4m/m

.2520

W

.3860

22.m/m

.8661

52

.0635

23

.1540

6.5m/m

.2559

9.9m/m

.3898

 7/8

.8750

1.7m/m

.0669

  5/32

.1562

F

.2570

 25/64

.3906

22.5m/m

.8858

51

.0670

22

.1570

6.6m/m

.2598

10.m/m

.3937

 57/64

.8906

1.75m/m

.0689

4.m/m

.1575

G

.2610

X

.3970

23.m/m

.9055

 

 

 

 

 

 

 

 

 

50

.0700

21

.1590

6.7m/m

.2638

Y

.4040

 29/32

.9062

1.8m/m

.0709

20

.1610

 17/64

.2656

 13/32

.4062

 59/64

.9219

49

.0730

4.1m/m

.1614

H

.2660

Z

.4130

23.5m/m

.9252

1.9m/m

.0748

4.2m/m

.1654

6.8m/m

.2677

10.5m/m

.4134

 15/16

.9375

48

.0760

19

.1660

6.9m/m

.2717

 27/64

.4219

24.m/m

.9449

 

 

 

 

 

 

 

 

 

  5/64

.0781

4.3m/m

.1693

I

.2720

11.m/m

.4331

 61/64

.9531

47

.0785

18

.1695

7.m/m

.2756

  7/16

.4375

24.5m/m

.9646

2.m/m

.0787

 11/64

.1719

J

.2770

11.5m/m

.4528

 31/32

.9688

46

.0810

17

.1730

7.1m/m

.2795

 29/64

.4531

25.m/m

.9843

45

.0820

4.4m/m

.1732

K

.2810

 15/32

.4688

 63/64

.9844

 

 

 

 

 

 

 

 

1

1.0000

 

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