• Drill & Tap Chart

    photo: Aimée Duddridge-Picard

This sortable Drill & Tap chart features gauge, letter, fractional and metric drill sizes, and allows you to identify their corresponding inch or metric cutting, forming and pipe taps, as well as decimal inches to millimeter measurement conversions.

Select the chart filters below to display or hide columns.
Best viewed on desktop.

Display Measurements:
Gauge DrillLetter DrillFractional DrillMetric DrillDecimal InchesMMInch Cutting TapMetric Cutting TapInch Pipe TapMetric Pipe TapInch Forming TapMetric Forming Tap
#800.01350.343
#790.01450.368
1/640.01560.397
0.400.01580.400
#780.01600.406
#770.01800.457
0.500.01970.500
#760.02000.508
#750.02100.533
#740.02250.572
0.600.02360.600
#730.02400.610
#720.02500.635
#710.02600.660
0.700.02760.700
#700.02800.711
#690.02920.742
#680.03100.787
1/320.03120.794
0.800.03150.800
#670.03200.813
#660.03300.838
#650.03500.889
0.900.03540.900
#640.03600.914
#630.03700.940
#620.03800.965
#610.39000.991
1.000.03941.000
#600.04001.016
#590.04101.041
#580.04201.067
#570.04301.092
1.100.04330.100
#560.04651.181
3/640.04691.1910 - 80
1.200.04721.200
1.250.04921.250M1.6 x 0.35
1.300.05121.300
#550.05201.321
#540.05501.397
1.400.05511.400
1.450.57101.450M1.8 x 0.35M1.6 x 0.35
1.500.05911.500
#530.05951.5111 - 64,72
1/160.06251.588
1.600.06301.600M2 x 0.4
#520.06351.613
1.650.06501.650M1.8 x 0.35
1.700.06691.700
#510.06701.7021-64,72
#500.07001.7782 - 56,64
1.800.07091.800M2 x 0.4
#490.07301.854
1.900.07481.900
#480.07601.930
5/640.07811.9842 - 56
#470.07851.9943 - 482-64
2.000.07872.000
2.050.08072.050M2.5 x 0.45
#460.08102.057
#450.08202.0833 - 56
2.100.08272.100
#440.08602.184
2.200.08662.200
#430.08902.2614 - 403 - 48
2.300.09062.3003 - 56M2.5 x 0.45
#420.09352.3754 - 48
3/320.09382.381
2.400.09452.100
#410.09602.438
#400.09802.489
2.500.09842.500M3 x 0.5
#390.09952.527
#380.10152.5785 - 404 - 40
2.600.10242.6004 - 48
#370.10402.6425 - 44
2.700.10632.700
#360.10652.7056 -32
7/640.10942.778M3 x 0.5
#350.11002.794
2.800.11022.800
#340.11102.819
#330.11302.8706 - 405 - 40
2.900.11422.900M3.5 x 0.65 - 44
#320.11602.946
3.000.11813.000
#310.12003.048
3.100.12213.100
1/80.12503.1756 - 32
3.200.12603.200M3.5 x 0.6
#300.12853.2646 - 40
3.300.12993.300M4 x 0.7
3.400.13393.400
#290.13603.4548 - 32, 36
3.500.13783.500
#280.14053.569
9/640.14063.572
3.600.14173.600
#270.14403.658M4 x 0.7
3.700.14573.700M4.5 x 0.75
#260.14703.73410 - 24
#250.14953.7978 - 32
3.800.14963.800
#240.15203.8618 - 36
3.900.15353.900
#230.15403.912
5/320.15623.969
#220.15703.988
4.000.15754.000
#210.15904.03910 - 32
#200.16104.089
4.100.16144.100M4.5 x 0.75
4.200.16544.200M5 x 0.8
#190.16604.216
4.300.16934.300
#180.16954.305
11/640.17194.36610 - 24
#170.17304.394
4.400.17324.400
#160.17704.49612 - 2410 - 32
4.500.17724.500
#150.18004.57212 - 28
4.600.18114.600
#140.18204.623M5 x 0.8
#134.700.18504.700
3/160.18754.763
4.800.18904.800
#120.18904.801
#110.19104.851
4.900.19294.900
#100.19354.915
#90.19604.978
5.000.19695.000M6 x 1
#80.19905.05512- 24
5.100.20085.100
#70.20105.1051/4 - 2012 - 28
13/640.20315.159
#60.20405.182
5.200.20475.200
#50.20555.220
5.300.20875.300
#40.20905.309
5.400.21265.400
#30.21305.4101/4 - 28
5.500.21655.500M6 x 1
7/320.21885.556
5.600.22055.600
#20.22105.613
5.700.22445.700
#10.22805.7911/4 - 20
5.800.22845.800
5.900.23235.900
A0.23405.944
15/640.23445.9531/4 - 28
6.000.23626.000M7 x 1.00
B0.23806.045
6.100.24026.100
C0.24206.147
6.200.24416.200
D0.24606.248
6.300.24806.300
E1/40.25006.350
6.400.25206.400
6.500.25596.500M7 x 1
F0.25706.5285/16 - 18
6.600.25986.600
G0.26106.629
6.700.26386.700
17/640.26566.747
H0.26606.756
6.800.26776.800M8 x 1.25
6.900.27176.900M8 x 1
I0.27206.9095/16 - 24
7.000.27567.000M8 x 1
J0.27707.036
7.100.27957.100
K0.28107.137
9/320.28127.144
7.200.28357.200
7.300.28747.300
L0.29007.3665/16 - 18
7.400.29137.400M8 x 1.25
M0.29507.4935/16 - 24
7.500.29537.500M8 x 1
19/640.29697.541
7.600.29927.600
N0.30207.671
7.700.30327.700
7.800.30717.800
7.900.31107.900
5/160.31257.9383/8 - 16
8.000.31508.000
O0.31608.026
8.100.31898.100
8.200.32288.200
P0.32308.204
8.300.32688.300
21/640.32818.334
8.400.33078.400
Q0.33208.4333/8 - 24
8.500.33478.500M10 x 1.5
8.600.33868.600
R0.33908.611
8.700.34258.700
11/320.34388.7311/8 - 27
8.800.34658.800M10 x 1.25
S0.34808.8393/8 - 16
8.900.35048.900M10 x 1
9.000.35439.000
T0.35809.0933/8 - 24
9.100.35839.100
23/640.35949.128
9.200.36229.200M10 x 1.5
9.300.36619.300
U0.36809.3477/16 - 14
9.400.37019.400M10 x 1.25
9.500.37409.500
3/80.37509.525
V0.37709.576
9.600.37809.600
9.700.38199.700
9.800.38589.800
W0.38609.804
9.900.38989.900
25/640.39069.9227/16 - 20
10.000.393710.000
X0.397010.084
10.100.397610.100
10.200.401610.200M12 x 1.75M12 x 1.5
Y0.404010.2627/16 - 14
10.300.405510.300
13/320.406210.319
10.400.409410.400
Z0.413010.4907/16 - 20
10.500.413410.500
10.600.417310.600
10.700.421210.700
27/640.421910.7161/2 - 13
10.800.425210.800M12 x 1.25
10.900.429110.900
11.000.433111.000
11.100.437011.100
7/160.437511.1131/4 - 18
11.200.440911.200M12 x 1.75
11.300.444811.300
11.400.448811.400
11.500.452811.500M12 x 1.25
29/640.453111.5091/2 - 20
11.600.456611.600
11.700.460611.700
11.800.464511.800
11.900.468511.900
15/320.468811.9061/2 - 13
12.000.472412.000M14 x 2
12.100.476312.100
12.200.482312.200M14 x 1.51/2 - 20
12.300.484212.300
31/640.484412.3039/16 - 12
12.400.488112.400
12.500.492112.500M14 x 1.5
12.600.496012.600
1/212.700.500012.700
12.800.503912.800
12.900.507812.900
13.000.511813.000M14 x 2
33/640.515613.0979/16 - 18
13.100.515713.100
13.200.519713.200
13.300.523613.300
13.350.525613.350M14 x 1.5
13.400.527513.400
17/320.531213.4945/8 - 119/16 - 12
13.500.531313.5009/16 - 18
13.600.535413.600
13.700.539413.700
13.805433.000013.800
35/640.546913.891
13.900.547213.900
14.000.551214.000M16 x 2M16 x 1.5
14.250.561014.250
9/160.562514.288
14.500.570914.500M16 x 1.5
37/640.578114.6845/8 - 183/8 - 18
14.750.580714.7505/8 - 11
15.000.590615.000M16 x 2
19/320.593815.081
15.250.600415.2505/8 - 18M16 x 1.5
15.500.610215.500M18 x 2.5
39/640.609415.478
15.750.620115.750
5/80.625015.875
16.000.629916.000M18 x 1.5
16.250.639816.250
41/640.640616.272
16.500.649616.500M18 x 1.5
21/320.656216.6693/4 - 10
16.750.659416.750
16.850.663416.850M18 x 2.5
17.000.669317.000
43/640.671917.066
17.250.679117.250M18 x 1.5
11/160.687517.4633/4 - 16
17.500.689017.500M20 x 2.5
17.750.698817.750
45/640.703117.8593/4 - 10
18.000.708718.000M20 x 1.5
18.250.718518.250
23/320.718818.2561/2 - 143/4 - 16
18.500.728418.500M20 x 1.5
47/640.734418.653
18.750.738218.750
18.850.742118.850M20 x 2.5
19.000.748019.000
3/40.750019.050
19.250.757919.250
19.350.761819.350M20 x 1.5
49/640.765619.4477/8 - 9
19.500.767719.500M22 x 2.5
19.750.777619.750
25/320.781219.844
20.000.787420.000M22 x 1.5
51/640.796920.241
20.250.797220.250
20.500.807120.500M22 x 1.5
13/160.812520.6387/8 - 14
20.750.816920.750
20.850.820920.850M22 x 2.5
21.000.826821.000M24 x 3
53/640.828121.034
21.250.836621.250M22 x 1.5
21.350.840621.350
27/320.843821.431
21.500.846521.500
21.750.856321.750
55/640.859421.828
22.000.866122.000M24 x 2
7/80.875022.2251 - 8
22.250.876022.250
22.500.885822.500
57/640.890622.622
22.650.891722.650M24 x 3
22.750.895722.750
23.000.905523.000
29/320.906223.019
23.250.915423.250
59/640.921923.4161 -123/4 - 14
23.500.925223.500
23.750.935023.750
15/160.937523.8131 - 14
24.000.944924.000M27 x 3
61/640.953124.209
24.250.954724.250
24.500.964624.500
31/320.968824.606
24.750.974424.750
25.000.984325.000M27 x 2
63/640.984425.0031 1/8 - 7
25.250.994125.250
11.000025.400

*Thread engagements for taps vary between 55% and 80%. For more detailed information, see the Machinery’s Handbook.