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Metric Machine Screws Tap Drills Chart

This table is the chart for publication of information of metric machine screws, along with tap and clearance drill information. If all else fails, you may want to use our Drill Size Conversion Table or our Tap Drill Size Calculator. The information available from our sources is usually sufficient for all computer related drill or screw requirements world wide.

US sizes Machine Screw Size Chart

Metric Screw Sizes

Screw Size Tapping Drills Clearance Drills
Nom. Dia. (mm)Pitch (mm)Series Drill Size
(65-75% thread)
Dec. Equiv. Close FitFree Fit
Drill SizeDec. Equiv.Drill SizeDec. Equiv.
10.20Fine 0.800.0315 1.050.04131.200.0472
0.25Coarse 0.750.0295
1.10.20Fine 0.900.0354 1.150.04531.300.0512
0.25Coarse 0.850.0335
1.20.20Fine 1.000.0394 1.300.05121.500.0590
0.25Coarse 0.950.0374
1.40.20Fine 1.200.0472 1.500.05911.700.0669
0.30Coarse 1.100.0433
1.60.20Fine 1.400.0551 1.700.06692.000.0787
0.35Coarse 1.250.0492
1.80.20Fine 1.600.0630 1.900.07482.200.0866
0.35Coarse 1.450.0571
20.25Fine 1.750.0689 2.200.08662.600.1024
0.40Coarse 1.600.0630
2.20.25Fine 1.950.0768 2.400.09452.800.1102
0.45Coarse 1.750.0689
2.50.35Fine 2.150.0846 2.700.10633.100.1220
0.45Coarse 2.050.0807
30.35Fine 2.650.1043 3.200.12603.600.1417
0.50Coarse 2.500.0984
3.50.35Fine 3.150.1240 3.700.14574.200.1653
0.60Coarse 2.900.1142
40.50Fine 3.500.1378 4.300.16934.800.1890
0.70Coarse 3.300.1299
4.50.50Fine 4.000.1575 4.800.18905.300.2087
0.75Coarse 3.700.1457
50.50Fine 4.500.1772 5.300.20875.800.2283
0.80Coarse 4.200.1654
60.75Fine 5.250.2067 6.400.25207.000.2756
1.00Coarse 5.000.1969
70.75Fine 6.250.2461 7.400.29138.000.3150
1.00Coarse 6.000.2362
80.75Fine 7.250.2854 8.400.330710.000.3937
1.00Fine 7.500.2953
1.25Coarse 6.800.2677
90.75Fine 8.250.3248 9.500.374010.500.4134
1.00Fine 8.000.3150
1.25Coarse 7.800.3071
100.75Fine 9.250.3642 10.500.413412.000.4724
1.00Fine 9.000.3543
1.25Fine 8.800.3465
1.50Coarse 8.500.3346
110.75Fine 10.250.4035 12.000.472413.000.5118
1.00Fine 10.000.3937
1.50Coarse 9.500.3740
121.00Fine 11.000.4331 13.000.511815.000.5905
1.25Fine 10.750.4232
1.50Fine 10.500.4134
1.75Coarse 10.200.4016
141.00Fine 13.000.5118 15.000.590517.00.6693
1.25Fine 12.800.5039
1.50Fine 12.500.4921
2.00Coarse 12.000.4724
151.00Fine 14.000.5512 16.000.629918.000.7087
1.50Fine 13.500.5315
161.00Fine 15.000.5906 17.000.669319.000.7480
1.50Fine 14.500.5709
2.00Coarse 14.000.5512
171.00Fine 16.000.6299 18.000.708720.000.7874
1.50Fine 15.500.6103
181.00Fine 17.000.6693 19.000.748021.000.8268
1.50Fine 16.500.6496
2.00Fine 16.000.6299
2.50Coarse 15.500.6102
201.00Fine 19.000.7480 21.000.826824.000.9449
1.50Fine 18.500.7283
2.00Fine 18.000.7087
2.50Coarse 17.500.6890
221.00Fine 21.000.8268 23.000.905526.001.0236
1.50Fine 20.500.8071
2.00Fine 20.000.7874
2.50Coarse 19.500.7677
241.00Fine 23.000.9055 25.000.984228.001.1024
1.50Fine 22.500.8858
2.00Fine 22.000.8661
3.00Coarse 21.000.8268
251.00Fine 24.000.9449 26.001.023630.001.1811
1.50Fine 23.500.9252
2.00Fine 23.000.9055
261.50Fine 24.500.9646



271.00Fine 26.001.0236 28.001.102432.001.2598
1.50Fine 25.501.0039
2.00Fine 25.000.9843
3.00Coarse 24.000.9449
281.00Fine 27.001.0630



1.50Fine 26.501.0433
2.00Fine 26.001.0236
301.00Fine 29.001.1417 31.001.220535.001.3779
1.50Fine 28.501.1220
2.00Fine 28.001.1024
3.00Fine 27.001.0630
3.50Coarse 26.501.0433
321.50Fine 30.501.2008



2.00Fine 30.001.1811
331.50Fine 31.501.2402 34.001.338638.001.4961
2.00Fine 31.001.2205
3.00Fine 30.001.1811
3.50Coarse 29.501.1614
351.50Fine 33.501.3189



2.00Fine 33.001.2992
361.50Fine 34.501.3583 37.001.456742.001.6535
2.00Fine 34.001.3386
3.00Fine 33.001.2992
4.00Coarse 32.001.2598
391.50Fine 37.501.4764 40.001.574845.001.7716
2.00Fine 37.001.4567
3.00Fine 36.001.4173
4.00Coarse 35.001.3780
401.50Fine 38.501.5157



2.00Fine 38.001.4961
3.00Fine 37.001.4567
421.50Fine 40.501.5945 43.001.692948.001.8898
2.00Fine 40.001.5748
3.00Fine 39.001.5354
4.00Fine 38.001.4961
4.50Coarse 37.501.4764
451.50Fine 43.501.7126 46.001.811052.002.0472
2.00Fine 43.001.6929
3.00Fine 42.001.6535
4.00Fine 41.001.6142
4.50Coarse 40.501.5945
481.50Fine 46.501.8307 50.001.968556.002.2047
2.00Fine 46.001.8110
3.00Fine 45.001.7717
4.00Fine 44.001.7323
5.00Coarse 43.001.6929
501.50Fine 48.501.9094



2.00Fine 48.001.8898
3.00Fine 47.001.8504
521.50Fine 50.501.9882 54.002.126062.002.4409
2.00Fine 50.001.9685
3.00Fine 49.001.9291
4.00Fine 48.001.8898
5.00Coarse 47.001.8504
551.50Fine 53.502.1063



2.00Fine 53.002.0866
3.00Fine 52.002.0472
4.00Fine 51.002.0079
561.50Fine 54.502.1457 58.002.283566.002.5984
2.00Fine 54.002.1260
3.00Fine 53.002.0866
4.00Fine 52.002.0472
5.50Coarse 50.501.9882
Nom. Dia. (mm)Pitch (mm)Series Drill Size
(65-75% thread)
Dec. Equiv. Drill SizeDec. Equiv.Drill SizeDec. Equiv.
Close FitFree Fit
Screw Size Tapping Drills Clearance Drills
Updated: 8/12/11


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