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Encyclopedia > Drill and tap size chart

Below is a comprehensive drill and tap size chart for all drills, imperial and metric, and taps up to 1 inch. A pdf version is available as a quick reference. The Imperial units or the Imperial system is a collection of English units, first defined in the Weights and Measures Act of 1824, later refined (until 1959) and reduced. ... The International System of Units (symbol: SI) (for the French phrase Syst me International dUnit s) is the most widely used system of units. ... Mid-19th century tool for converting between different standards of the inch An inch is an Imperial and U.S. customary unit of length. ...


Chart

This list is incomplete; you can help by expanding it.
Diameter Diameter Fractional Drill wire gauge[1][2] Tap size[3][4] Clearance Clearance Theoretical percentage of thread[5]
mm (4 d.p.) in (5 d.p.) in close fit[6] free fit[6] %
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
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
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
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
1.9844 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
2.0500 0.08071
2.0574 0.08100 46
2.0828 0.08200 45 #3-56 0.10400" 0.11000" 74
2.1000 0.08268
2.1500 0.08465
2.1844 0.08600 44 #4-36 0.11600" 0.12850"
2.2000 0.08661
2.2500 0.08858
2.2606 0.08900 43 #4-40 0.11600" 0.12850" 71
2.3000 0.09055
2.3500 0.09252
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
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
12.0000 0.47244
12.3031 0.48438 31/64
12.5000 0.49213
12.7000 0.50000 1/2
13.0000 0.51181
13.0969 0.51563 33/64
13.4938 0.53125 17/32
13.5000 0.53150
13.8906 0.54688 35/64
14.0000 0.55118
14.2875 0.56250 9/16
14.5000 0.57087
14.6844 0.57813 37/64
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
16.5000 0.64961
16.6688 0.65625 21/32
17.0000 0.66929
17.0656 0.67188 43/64
17.4625 0.68750 11/16
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
19.5000 0.76772
19.8438 0.78125 25/32
20.0000 0.78740
20.2406 0.79688 51/64
20.5000 0.80709
20.6375 0.81250 13/16
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
22.0000 0.86614
22.2250 0.87500 7/8
22.5000 0.88583
22.6219 0.89063 57/64
23.0000 0.90551
23.0188 0.90625 29/32
23.4156 0.92188 59/64
23.5000 0.92520
23.8125 0.93750 15/16
24.0000 0.94488
24.2094 0.95313 61/64
24.5000 0.96457
24.6063 0.96875 31/32
25.0000 0.98425
25.0031 0.98438 63/34
25.4000 1.00000 1

References

  • The chart was created from:Drill and tap size chart v2006-08-29-2049.xls (file contains macro to create wikitable).
  1. ^ Continuous Drill Bit Sizes. Retrieved on 2006-08-29.
  2. ^ Decimal Equivalents. Ohio State University. Retrieved on 2006-08-29.
  3. ^ Tap Drill Sizes and Calculator. newmantools.com. Retrieved on 2006-08-04.
  4. ^ Tap Drill Sizes for Universal and M-Profile Screw Threads. precisiontwistdrill.com. Retrieved on 2006-08-04.
  5. ^ Tapping Made Easy (pdf). guhring.com. Retrieved on 2006-08-04.
  6. ^ a b Tap Drill Sizes. efunda.com. Retrieved on 2006-08-04.


2006 (MMVI) is a common year starting on Sunday of the Gregorian calendar. ... August 29 is the 241st day of the year in the Gregorian Calendar (242nd in leap years), with 124 days remaining. ... 2006 (MMVI) is a common year starting on Sunday of the Gregorian calendar. ... August 29 is the 241st day of the year in the Gregorian Calendar (242nd in leap years), with 124 days remaining. ... 2006 (MMVI) is a common year starting on Sunday of the Gregorian calendar. ... August 4 is the 216th day of the year in the Gregorian Calendar (217th in leap years), with 149 days remaining. ... 2006 (MMVI) is a common year starting on Sunday of the Gregorian calendar. ... August 4 is the 216th day of the year in the Gregorian Calendar (217th in leap years), with 149 days remaining. ... 2006 (MMVI) is a common year starting on Sunday of the Gregorian calendar. ... August 4 is the 216th day of the year in the Gregorian Calendar (217th in leap years), with 149 days remaining. ... 2006 (MMVI) is a common year starting on Sunday of the Gregorian calendar. ... August 4 is the 216th day of the year in the Gregorian Calendar (217th in leap years), with 149 days remaining. ...

Metalworking:

 Drilling and threading: Image File history File links Blacksmith-hammer-anvil-50x50. ... Turned chess pieces Metalworking is the craft and practice of working with metals to create parts or structures. ...

Die head | Drill | Drill bit | Drill bit shank | Drill bit sizes | Drill and tap size chart | Drilling | Pin chuck | Screw thread | Taps and dies | Tap wrench A die head is a threading die that is used in the high volume production of threaded components. ... A drill is a tool with a rotating drill bit used for drilling holes in various materials. ... Drill bits are cutting tools used to create cylindrical holes. ... The shank is the part of a drill bit grasped by the chuck of a drill. ... Drill bits are the cutting tools of drilling machines. ... An electric drill A drill is a tool with a rotary drill bit used to bore holes through material. ... Two pin chucks. ... Screw thread, used to convert torque into the linear force in the flood gate. ... Taps and dies are metalworking tools for the creation (cutting) of screw threads in metal parts. ... Two Bar tap wrenches and a T style tap wrench A tap wrench is a hand tool used to operate any small tool that has a square driving head as part of its body. ...

Metalworking topics:  

Casting | CNC | Cutting tools | Drilling and threading | Fabrication | Finishing | Grinding | Jewellery | Lathe (tool) | Machining | Machine tooling | Measuring | Metalworking | Hand tools | Metallurgy | Milling | Occupations | Press tools | Smithing | Terminology | Welding Turned chess pieces Metalworking is the craft and practice of working with metals to create parts or structures. ... One half of a bronze mold for casting a socketed spear head dated to the period 1400-1000 BC. This article is about the manufacturing process; for other uses, see Casting (disambiguation). ... A CNC Turning Center The abbreviation CNC stands for Computer Numerical Control, and refers specifically to the computer control of machine tools for the purpose of (repeatedly) manufacturing complex parts in metal as well as other materials, using a program written in a notation conforming to the EIA-274-D... a Cutting Tool, in the context of Metalworking is any tool that is used to remove metal from the workpiece by means of shear deformation. ... Drilling is the process of using a drill bit in a drill to produce holes. ... A typical steel fabrication shop Fabrication is an industrial term generally applied to the building of metal machines and structures. ... Metalworking finishing is the activity of making things out of metal in a skillful manner. ... Rotating abrasive wheel on a bench grinder. ... Jewellery (Jewelry in American English) is literally any piece of fine material used to adorn one’s self. ... Conventional metalworking lathe In woodturning, metalworking, metal spinning, and glassworking, a lathe is a machine tool which spins a block of material so that when abrasive, cutting, or deformation tools are applied to the block, it can be shaped to produce an object which has rotational symmetry about an axis... A lathe is a common tool used in machining. ... A machine tool is a powered mechanical device, typically used to fabricate metal components of machines by the selective removal of metal. ... The examples and perspective in this article or section may not represent a worldwide view. ... Turned chess pieces Metalworking is the craft and practice of working with metals to create parts or structures. ... Metalworking hand tools are hand tools that are used in the metalworking field. ... Metallurgy is a domain of materials science and of materials engineering that studies the physical and chemical behavior of metallic elements, their intermetallic compounds, and their mixtures, which are called alloys. ... Cutters for a milling machine. ... It has been suggested that this article or section be merged with Smith (metalwork). ... Power press with a fixed barrier guard A press, or a machine press is a tool used to work metal (typically steel) by changing its shape and internal structure. ... A smith or metalsmith is a person involved in the shaping of metal objects. ... This article needs to be wikified. ... Welding is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. ...



 

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