Drill and tap size chart

From Wikipedia, the free encyclopedia

Below is a comprehensive drill and tap size chart for all drills, imperial and metric, and taps up to 1½ inch. A pdf version is available as a quick reference.

[edit] Chart

This list is incomplete; you can help by expanding it.
 Diameter   Diameter   Fractional   Drill wire
 gauge[1][2] 		  Tap size[3][4][5]  Clearance   Clearance   Theoretical percentage† of thread[6][7] Outer Diameter
[mm (4 d.p.)] [in (5 d.p.)] [in] [close fit][8] [free fit][9] [%]

0.0483

0.00190

 107

0.0500

0.00197

0.0584

0.00230

 106

0.0686

0.00270

 105

0.0787

0.00310

 104

0.0889

0.00350

 103

0.0991

0.00390

 102

0.1000

0.00394

0.1092

0.00430

 101

0.1194

0.00470

 100

0.1295

0.00510

 99

0.1397

0.00550

 98

0.1499

0.00590

 97

0.1600

0.00630

 96

0.1702

0.00670

 95

0.1803

0.00710

 94

0.1905

0.00750

 93

0.2007

0.00790

 92

0.2000

0.00787

0.2108

0.00830

 91

0.2210

0.00870

 90

0.2311

0.00910

 89

0.2413

0.00950

 88

0.2500

0.00984

0.2540

0.01000

 87

0.2667

0.01050

 86

0.2794

0.01100

 85

0.2921

0.01150

 84

0.3000

0.01181

0.3048

0.01200

 83

0.3175

0.01250

 82

0.3302

0.01300

 81

0.3429

0.01350

 80

0.3500

0.01378

0.3680

0.01449

 79

0.3969

0.01563

 1/64 #0000-160‡ 0.02400" 0.021 in

0.4000

0.01575

0.4064

0.01600

 78

0.4200

0.01654

0.4400

0.01732

0.4500

0.01772

0.4572

0.01800

 77

0.4600

0.01811

0.4800

0.01890

0.5000

0.01969

0.5080

0.02000

 76

0.5334

0.02100

 75

0.5500

0.02165

0.5715

0.02250

 74

0.6000

0.02362

0.6096

0.02400

 73

0.6350

0.02500

 72

0.6500

0.02559

0.6604

0.02600

 71 #000-120‡ 0.03700"

0.7000

0.02756

0.7112

0.02800

 70

0.7417

0.02920

 69

0.7500

0.02953

0.7874

0.03100

 68

0.7938

0.03125

 1/32

0.8000

0.03150

8.1280

0.32000

 67

0.8382

0.03300

 66

0.8500

0.03346

0.8890

0.03500

 65 #00-90‡ 0.05200"

0.9000

0.03543

0.9144

0.03600

 64

0.9398

0.03700

 63

0.9500

0.03740

0.9652

0.03800

 62

0.9906

0.03900

 61

1.0000

0.03937

1.0160

0.04000

 60

1.0414

0.04100

 59

1.0500

0.04134

1.0668

0.04200

 58

1.0922

0.04300

 57

1.1000

0.04331

1.1500

0.04528

1.1811

0.04650

 56

1.1906

0.04688

 3/64 #0-80 0.06350" 0.07000"

1.2000

0.04724

1.2500

0.04921

1.3000

0.05118

1.3208

0.05200

 55

1.3500

0.05315

1.3970

0.05500

 54

1.4000

0.05512

1.4500

0.05709

1.5000

0.05906

1.5113

0.05950

 53 #1-64, #1-72 0.07600" 0.08100"

1.5500

0.06102

1.5875

0.06250

 1/16

1.6000

0.06299

1.6129

0.06350

 52

1.6500

0.06496

1.7000

0.06693

1.7018

0.06700

 51 #2-56 0.08900" 0.09600"

1.7500

0.06890

1.7780

0.07000

 50 #2-56, #2-64 0.08900" 0.09600"

1.8000

0.07087

1.8500

0.07283

1.8542

0.07300

 49

1.9000

0.07480

1.9304

0.07600

 48

1.9500

0.07677

1.9600

0.07717

 #3-48 0.10400" 0.11000" 81

1.9700

0.07756

 #3-48 0.10400" 0.11000" 79

1.9844

0.07813

 5/64 #3-48 0.10400" 0.11000" 78

1.9939

0.07850

 47 #3-48 0.10400" 0.11000" 76

2.0000

0.07874

 #3-48 0.10400" 0.11000" 75

2.0100

0.07913

 #3-48 0.10400" 0.11000" 74

2.0200

0.07953

 #3-48 0.10400" 0.11000" 72

2.0300

0.07992

 #3-48 0.10400" 0.11000" 71

2.0400

0.08031

 #3-48
#3-56		 0.10400" 0.11000" 69
81

2.0500

0.08071

 #3-48
#3-56		 0.10400" 0.11000" 68
79

2.0574

0.08100

 46 #3-48
#3-56		 0.10400" 0.11000" 66
77

2.0700

0.08150

 #3-48
#3-56		 0.10400" 0.11000" 65
75

2.0828

0.08200

 45 #3-48
#3-56		 0.10400" 0.11000" 66
74

2.0900

0.08228

 #3-48
#3-56		 0.10400" 0.11000" 62
72

2.1000

0.08268

 #3-48
#3-56		 0.10400" 0.11000" 60
70

2.1100

0.08307

 #3-48
#3-56		 0.10400" 0.11000" 59
69

2.1200

0.08346

 #3-56 0.10400" 0.11000" 67

2.1300

0.08386

 #3-56 0.10400" 0.11000" 65

2.1400

0.08425

 #3-56 0.10400" 0.11000" 63

2.1500

0.08465

 #3-56 0.10400" 0.11000" 62

2.1600

0.08504

 #3-56 0.10400" 0.11000" 60

2.1700

0.08543

 #3-56 0.10400" 0.11000" 59

2.1844

0.08600

 44 #4-36 0.11600" 0.12850" 81

2.1900

0.08622

 #4-40 0.11600" 0.12850" 81

2.2000

0.08661

 #4-40 0.11600" 0.12850" 78

2.2100

0.08701

 #4-40 0.11600" 0.12850" 77

2.2200

0.08740

 #4-40 0.11600" 0.12850" 76

2.2300

0.08780

 #4-40 0.11600" 0.12850" 75

2.2400

0.08819

 #4-40 0.11600" 0.12850" 73

2.2500

0.08858

 #4-40 0.11600" 0.12850" 72

2.2600

0.08898

 #4-40 0.11600" 0.12850" 71

2.2606

0.08900

 43 #4-40 0.11600" 0.12850" 71

2.2700

0.08937

 #4-40 0.11600" 0.12850" 70

2.2800

0.08976

 #4-40 0.11600" 0.12850" 68

2.2900

0.09016

 #4-40
#4-48		 0.11600" 0.12850" 67
81

2.3000

0.09055

 #4-40
#4-48		 0.11600" 0.12850" 66
79

2.3100

0.09094

 #4-40
#4-48		 0.11600" 0.12850" 65
78

2.3200

0.09134

 #4-40
#4-48		 0.11600" 0.12850" 64
76

2.3300

0.09

 #4-40
#4-48		 0.11600" 0.12850" 63
75

2.3400

0.09213

 #4-40
#4-48		 0.11600" 0.12850" 61
74

2.3500

0.09252

 #4-40
#4-48		 0.11600" 0.12850" 60
72

2.3749

0.09350

 42 #4-48 0.11600" 0.12850" 69

2.3813

0.09375

 3/32

2.4000

0.09449

2.4384

0.09600

 41

2.4500

0.09646

2.4892

0.09800

 40

2.5000

0.09843

2.5273

0.09950

 39 #5-40 0.12850" 0.13600" 78

2.5781

0.10150

 38 #5-40 0.12850" 0.13600" 72

2.6000

0.10236

2.6416

0.10400

 37 #5-44 0.12850" 0.13600" 71

2.7000

0.10630

2.7051

0.10650

 36 #6-32 0.14400" 0.14950" 77

2.7500

0.10827

2.7781

0.10938

 7/64

2.7940

0.11000

 35

2.8000

0.11024

2.8194

0.11100

 34

2.8702

0.11300

 33

2.9000

0.11417

2.9464

0.11600

 32

3.0000

0.11811

3.0480

0.12000

 31

3.1000

0.12205

3.1750

0.12500

 1/8

3.2000

0.12598

3.2500

0.12795

3.2639

0.12850

 30

3.3000

0.12992

3.4000

0.13386

3.4544

0.13600

 29 #8-32 0.16950" 0.17700" 69

3.5000

0.13780

3.5687

0.14050

 28

3.5719

0.14063

 9/64

3.6000

0.14173

3.6576

0.14400

 27

3.7000

0.14567

3.7338

0.14700

 26

3.7500

0.14764

3.7973

0.14950

 25 #10-24 0.19600" 0.20100" 75

3.8000

0.14961

3.8608

0.15200

 24

3.9000

0.15354

3.9116

0.15400

 23

3.9688

0.15625

 5/32

3.9878

0.15700

 22

4.0000

0.15748

4.0386

0.15900

 21 #10-32 0.1960" 0.2010"

4.0894

0.16100

 20

4.1000

0.16142

4.2000

0.16535

4.2164

0.16600

 19

4.2500

0.16732

4.3000

0.16929

4.3053

0.16950

 18

4.3656

0.17188

 11/64

4.3942

0.17300

 17

4.4000

0.17323

4.4958

0.17700

 16 #12-24 0.22100" 0.22800" 72

4.5000

0.17717

4.5720

0.18000

 15

4.6000

0.18110

4.6228

0.18200

 14

4.6990

0.18500

 13

4.7000

0.18504

4.7500

0.18701

4.7625

0.18750

 3/16

4.8000

0.18898

4.8006

0.18900

 12

4.8514

0.19100

 11

4.9000

0.19291

4.9149

0.19350

 10

4.9784

0.19600

 9

5.0000

0.19685

5.0546

0.19900

 8

5.1000

0.20079

5.1054

0.20100

 7 1/4-20 0.25700" 0.26600" 72

5.1594

0.20313

 13/64

5.1816

0.20400

 6

5.2000

0.20472

5.2197

0.20550

 5

5.2500

0.20669

5.3000

0.20866

5.3086

0.20900

 4

5.4000

0.21260

5.4102

0.21300

 3 1/4-28 0.25700" 0.26600" 80

5.5000

0.21654

5.5563

0.21875

 7/32

5.6000

0.22047

5.6134

0.22100

 2

5.7000

0.22441

5.7500

0.22638

5.7912

0.22800

 1

5.8000

0.22835

5.9000

0.23228

5.9436

0.23400

 A

5.9531

0.23438

 15/64

6.0000

0.23622

6.0452

0.23800

 B

6.1000

0.24016

6.1468

0.24200

 C

6.2000

0.24409

6.2484

0.24600

 D

6.2500

0.24606

6.3000

0.24803

6.3500

0.25000

 1/4
E

6.4000

0.25197

6.5000

0.25591

6.5278

0.25700

 F 5/16-18 0.32300" 0.33200" 77

6.6000

0.25984

6.6294

0.26100

 G

6.7000

0.26378

6.7469

0.26563

 17/64

6.7500

0.26575

6.7564

0.26600

 H

6.8000

0.26772

6.9000

0.27165

6.9088

0.27200

 I 5/16-24 0.32300" 0.33200" 75

7.0000

0.27559

7.0358

0.27700

 J

7.1000

0.27953

7.1374

0.28100

 K

7.1438

0.28125

 9/32

7.2000

0.28346

7.2500

0.28543

7.3000

0.28740

7.3660

0.29000

 L

7.4000

0.29134

7.4930

0.29500

 M

7.5000

0.29528

7.5406

0.29688

 19/64

7.6000

0.29921

7.6708

0.30200

 N

7.7000

0.30315

7.7500

0.30512

7.8000

0.30709

7.9000

0.31102

7.9375

0.31250

 5/16 3/8-16 0.38600" 0.39700" 77

8.0000

0.31496

8.0264

0.31600

 O

8.1000

0.31890

8.2000

0.32283

8.2042

0.32300

 P

8.2500

0.32480

8.3000

0.32677

8.3344

0.32813

 21/64

8.4000

0.33071

8.4328

0.33200

 Q 3/8-24 0.38600" 0.39700" 79

8.5000

0.33465

8.6000

0.33858

8.6106

0.33900

 R

8.7000

0.34252

8.7313

0.34375

 11/32

8.7500

0.34449

8.8000

0.34646

8.8392

0.34800

 S

8.9000

0.35039

9.0000

0.35433

9.0932

0.35800

 T

9.1000

0.35827

9.1281

0.35938

 23/64

9.2000

0.36220

9.2500

0.36417

9.3000

0.36614

9.3472

0.36800

 U 7/16-14 0.45310" 0.46870" 75

9.4000

0.37008

9.5000

0.37402

9.5250

0.37500

 3/8

9.5758

0.37700

 V

9.6000

0.37795

9.7000

0.38189

9.7500

0.38386

9.8000

0.38583

9.8044

0.38600

 W

9.9000

0.38976

9.9219

0.39063

 25/64 7/16-20 0.45313" 0.46785" 72

10.0000

0.39370

10.0838

0.39700

 X

10.2616

0.40400

 Y

10.3188

0.40625

 13/32

10.4902

0.41300

 Z

10.5000

0.41339

10.7156

0.42188

 27/64 1/2-13 0.51563" 0.53125" 78

11.0000

0.43307

11.1125

0.43750

 7/16

11.5000

0.45276

11.5094

0.45313

 29/64 1/2-20 0.51563" 0.53125" 72

11.9063

0.46875

 15/32 9/16-12 0.56250" 87

12.0000

0.47244

12.3031

0.48438

 31/64 9/16-12 0.56250" 68

12.5000

0.49213

12.7000

0.50000

 1/2 9/16-18 0.56250" 87

13.0000

0.51181

13.0969

0.51563

 33/64 9/16-18 0.56250" 65

13.4938

0.53125

 17/32 5/8-11 0.62500" 79

13.5000

0.53150

13.8906

0.54688

 35/64 5/8-11 0.62500" 66

14.0000

0.55118

14.2875

0.56250

 9/16 5/8-18 0.62500" 87

14.5000

0.57087

14.6844

0.57813

 37/64 5/8-18 0.62500" 65

15.0000

0.59055

15.0813

0.59375

 19/32

15.4781

0.60938

 39/64

15.5000

0.61024

15.8750

0.62500

 5/8

16.0000

0.62992

16.2719

0.64063

 41/64 3/4-10 84

16.5000

0.64961

16.6688

0.65625

 21/32 3/4-10 72

17.0000

0.66929

17.0656

0.67188

 43/64

17.4625

0.68750

 11/16 3/4-16 77

17.5000

0.68898

17.8594

0.70313

 45/64

18.0000

0.70866

18.2563

0.71875

 23/32

18.5000

0.72835

18.6531

0.73438

 47/64

19.0000

0.74803

19.0500

0.75000

 3/4

19.4469

0.76563

 49/64 7/8-9 76

19.5000

0.76772

19.8438

0.78125

 25/32 7/8-9 65

20.0000

0.78740

20.2406

0.79688

 51/64 7/8-14 84

20.5000

0.80709

20.6375

0.81250

 13/16 7/8-14 67

21.0000

0.82677

21.0344

0.82813

 53/64

21.4313

0.84375

 27/32

21.5000

0.84646

21.8281

0.85938

 55/64 1-8 87

22.0000

0.86614

22.2250

0.87500

 7/8 1-8 77

22.5000

0.88583

22.6219

0.89063

 57/64 1-8 67

23.0000

0.90551

23.0188

0.90625

 29/32 1-12 87

23.4156

0.92188

59/64

 1-12 72
1-14 84

23.5000

0.92520

23.8125

0.93750

 15/16 1-14 67

24.0000

0.94488

24.2094

0.95313

 61/64

24.5000

0.96457

24.6063

0.96875

 31/32 1 1/8-7 84

25.0000

0.98425

25.0031

0.98438

 63/34 1 1/8-7 76

25.4000

1.00000

 1 1 1/8-7 67

25.5000

1.00394

25.7969

1.01563

 1 1/64

26.0000

1.02362

26.1938

1.03125

 1 1/32 1 1/8-12 87

26.5000

1.04331

26.5906

1.04688

 1 3/64 1 1/8-12 72

26.9875

1.06250

 1 1/16

27.0000

1.06299

27.5000

1.08268

28.0000

1.10236

28.1781

1.10938

 1 7/64 1 1/4-7 76

28.5000

1.12205

28.5750

1.12500

 1 1/8 1 1/4-7 67

29.0000

1.14173

29.3688

1.15625

 1 5/32 1 1/4-12 87

29.5000

1.16142

29.7656

1.17188

 1 11/64 1 1/4-12 72

30.0000

1.18110

30.1625

1.18750

 1 3/16 1 3/8-6 87

30.5000

1.20079

30.5594

1.20313

 1 13/64 1 3/8-6 79

30.9563

1.21875

 1 7/32 1 3/8-6 72

31.0000

1.22047

31.3531

1.23438

 1 15/64 1 3/8-6 65

31.5000

1.24016

32.0000

1.25984

32.5000

1.27953

32.5438

1.28125

 1 9/32 1 3/8-12 87

32.9406

1.29688

 1 19/64 1 3/8-12 72

33.0000

1.29921

33.3375

1.31250

 1 5/16 1 1/2-6 87

33.5000

1.31890

33.7344

1.32813

 1 21/64 1 1/2-6 79

34.0000

1.33858

34.1313

1.34375

 1 11/32 1 1/2-6 72

34.5000

1.35827

34.5281

1.35938

 1 23/64 1 1/2-6 65

35.0000

1.37795

35.5000

1.39764

35.7188

1.40625

 1 13/32 1 1/2-12 87

36.0000

1.41732

36.1156

1.42188

 1 27/64 1 1/2-12 72

36.5000

1.43701

[edit]

†If theoretical thread percentage not given, assume 75% ± 10%
‡See http://www.newmantools.com/taps/micro.htm for more information.

[edit] References

  1. ^ Continuous Drill Bit Sizes. Retrieved on August 29, 2006.
  2. ^ Decimal Equivalents. Ohio State University. Retrieved on August 29, 2006.
  3. ^ Tap Drill Sizes and Calculator. newmantools.com. Retrieved on August 4, 2006.
  4. ^ Tap Drill Sizes for Universal and M-Profile Screw Threads. precisiontwistdrill.com. Retrieved on August 4, 2006.
  5. ^ NC, NF, NEF to one inch in diameter. Sizes.com. Retrieved on September 1, 2006.
  6. ^ Tapping Made Easy (pdf). guhring.com. Retrieved on August 4, 2006.
  7. ^ Tap Drill Sizes. widell.com. Retrieved on September 1, 2006.
  8. ^ Tap & Clearance Drills For Common Screws. Small Parts Inc.. Retrieved on September 1, 2006.
  9. ^ Tap Drill Sizes. efunda.com. Retrieved on August 4, 2006.



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