No 80

0.3429

0.0135

79

0.3683

0.0145

1/64”

0.3962

0.0156

78

0.4064

0.0160

77

0.4572

0.0180

76

0.5080

0.0200

75

0.5334

0.0210

74

0.5715

0.0225

73

0.6096

0.0240

72

0.6350

0.0250

71

0.6604

0.0260

70

0.7112

0.0280

69

0.7417

0.0292

68

0.7874

0.0310

1/32”

0.7925

0.0312

67

0.8128

0.0320

66

0.8382

0.0330

65

0.8890

0.0350

64

0.9144

0.0360

63

0.9398

0.0370

62

0.9652

0.0380

61

0.9906

0.0390

60

1.0160

0.0400

59

1.0414

0.0410

58

1.0668

0.0420

57

1.0922

0.0430

56

1.1811

0.0465

3/64”

1.1913

0.0469

55

1.3208

0.0520

54

1.3970

0.0550

53

1.5113

0.0595

1/16”

1.5875

0.0625

52

1.6129

0.0635

51

1.7018

0.0670

50

1.7780

0.0700

49

1.8542

0.0730

48

1.9304

0.0760

5/64”

1.9837

0.0781

47

1.9939

0.0785

46

2.0574

0.0810

45

2.0828

0.0820

44

2.1844

0.0860

43

2.2606

0.0890

42

2.3749

0.0935

3/32”

2.3825

0.0938

41

2.4384

0.0960

40

2.4892

0.0980

39

2.5273

0.0995

38

2.5781

0.1015

37

2.6416

0.1040

36

2.7051

0.1065

7/64”

2.7788

0.1094

35

2.7940

0.1100

34

2.8194

0.1110

33

2.8702

0.1130

32

2.9464

0.1160

31

3.0480

0.1200

1/8”

3.1750

0.1250

30

3.2639

0.1285

29

3.4544

0.1360

28

3.5687

0.1405

9/64”

3.5712

0.1406

27

3.6576

0.1440

26

3.7338

0.1470

25

3.7973

0.1495

24

3.8608

0.1520

23

3.9116

0.1540

5/32”

3.9675

0.1562

22

3.9878

0.1570

21

4.0386

0.1590

20

4.0894

0.1610

19

4.2164

0.1660

18

4.3053

0.1695

11/64”

4.3663

0.1719

17

4.3942

0.1730

16

4.4958

0.1770

15

4.5720

0.1800

14

4.6228

0.1820

13

4.6990

0.1850

3/16”

4.7625

0.1875

12

4.8006

0.1890

11

4.8514

0.1910

10

4.9149

0.1935

9

4.9784

0.1960

8

5.0546

0.1990

7

5.1054

0.2010

13/64”

5.1587

0.2031

6

5.1816

0.2040

5

5.2197

0.2055

4

5.3086

0.2090

3

5.4102

0.2130

7/32”

5.5575

0.2188

2

5.6134

0.2210

1

5.7912

0.2280

A

5.9436

0.2340

15/64”

5.9538

0.2344

B

6.0542

0.2380

C

6.1468

0.2420

D

6.2484

0.2460

E 1/4”

6.3500

0.2500

F

6.5278

0.2570

G

6.6294

0.2610

17/64”

6.7462

0.2656

H

6.7564

0.2660

I

6.9088

0.2720

J

7.0358

0.2770

K

7.1374

0.2810

9/32”

7.1425

0.2812

L

7.3660

0.2900

M

7.4930

0.2950

19/64”

7.5413

0.2969

N

7.6708

0.3020

Letter & No sizes getting obsolete - should not be used in new designs

5/16”

7.9375

0.3125

O

8.0264

0.3160

P

8.2042

0.3230

21/64”

8.3337

0.3281

Q

8.4328

0.3320

R

8.6106

0.3390

11/32”

8.7325

0.3438

S

8.8392

0.3480

T

9.0932

0.3580

23/64”

9.1288

0.3594

U

9.3472

0.3680

3/8”

9.5250

0.3750

V

9.5758

0.3770

W

9.8044

0.3860

25/64”

9.9212

0.3906

X

10.0838

0.3970

Y

10.2616

0.4040

13/32”

10.3175

0.4062

Z

10.4902

0.4130

27/64”

10.7163

0.4219

7/16”

11.1125

0.4375

29/64”

11.5087

0.4531

15/32”

11.9075

0.4688

31/64”

12.3038

0.4844

1/2”

12.7000

0.5000

33/64”

13.0962

0.5156

17/32”

13.4925

0.5312

35/64”

13.9813

0.5469

9/16”

14.2875

0.5625

37/64”

14.6837

0.5781

19/32”

15.0825

0.5938

39/64”

15.4788

0.6094

5/8”

15.8750

0.6250

41/64”

16.2712

0.6407

21/32”

16.6675

0.6562

43/64”

17.0663

0.6719

11/16”

17.4625

0.6875

45/64”

17.8587

0.7031

23/32”

18.2575

0.7188

47/64”

18.6538

0.7344

3/4”

19.0500

0.7500

49/64”

19.4462

0.7656

25/32”

19.8425

0.7812

51/64”

20.2413

0.7969

13/16”

20.6375

0.8125

53/64”

21.0337

0.8281

27/32”

21.4325

0.8438

55/64”

21.8288

0.8594

7/8”

22.2250

0.8750

57/64”

22.6212

0.8906

29/32”

23.0175

0.9062

59/64”

23.4163

0.9219

15/16”

23.8125

0.9375

61/64”

24.2087

0.9531

31/32”

24.6075

0.9688

63/64”

25.0038

0.9844

1”

25.400

1.0000