Hole Chart – Imperial 2017-06-09T17:46:04+00:00

Tap and Clearance Hole Chart – Imperial

Imperial Drill ChartNightShade Electronics
ns-electric.com
Machine Screw SizeTap DrillsClearance Hole Diameters
Aluminum
Brass & Plastic
75% Thread
Stainless Steel
Steels & Iron
50% Thread
All Materials
Close FitFree Fit
NameMajor Dia.
(in)
Threads Per InchAmerican
Drill Size
Decimal Equiv.
(in)
American
Drill Size
Decimal Equiv.
(in)
American
Drill Size
Decimal Equiv.American
Drill Size
Decimal Equiv.
#0.0600803/64.046955.052052.063550.0700
#1.07306453.05951/16.062548.076046.0810
7253.059552.0635
#2.08605650.070049.073043.089041.0960
6450.070048.0760
#3.09904847.078544.086037.104035.1100
5645.082043.0890
#4.11204043.089041.096032.116030.1285
4842.093540.0980
#5.12504038.10157/64.109430.128529.1360
4437.104035.1100
#6.13803236.106532.116027.144025.1495
4033.113031.1200
#8.16403229.136027.144018.169516.177
3629.136026.1470
#10.19002425.149520.16109.19607.2010
3221.159018.1695
#12.21602416.177012.18902.22101.2280
2814.182010.1935
3213.18509.1960
1/4.2500207.20107/32.2188F.2570H.2660
283.21301.2280
327/32.21881.2280
5/16.312518F.2570J.2770P.3230Q.3320
24I.27209/32.2812
329/32.2812L.2900
3/8.3750165/16.3125Q.3320W.3860X.3970
24Q.3320S.3480
3211/32.3438T.3580
7/16.437514U.368025/64.390629/64.453115/32.4687
2025/64.390613/32.4062
28Y.4040Z.4130
1/2.50001327/64.421929/64.453133/64.515617/32.5312
2029/64.453115/32.4688
2815/32.468815/32.4688
9/16.56251231/64.484433/64.515637/64.578119/32.5938
1833/64.515617/32.5312
2433/64.515617/32.5312
5/8.62501117/32.53129/16.562541/64.64062132.6562
1837/64.578119/32.5938
2437/64.578119/32.5938
11/16.68752441/64.640621/32.656245/64.703123/32.7188
3/4.75001021/32.656211/16.687549/64.765625/32.7812
1611/16.687545/64.7031
2045/64.703123/32.7188
13/16.81252049/64.765625/32.781253/94.828127/32.8438
7/8.8750949/64.765651/64.796957/64.890629/32.9062
1413/16.812553/64.8281
2053/64.828127/32.8438
15/160.93752057/640.890629/320.906261/64.953131/32.9688
11.0087/8.875059/64.92191-1/641.01561-1/321.0313
1215/16.937561/64.9531
2061/64.953131/32.9688