Fillable Printable Standard Tap Drill Chart
Fillable Printable Standard Tap Drill Chart
Standard Tap Drill Chart
Tap Drill Chart
129
Tap Drill Chart (Standard 2B)
Nominal
Pipe Tap
Size
NPT & NPTF
w/o Reamer w/Reamer
1/16-27CA
1/8-27Q21/64
1/4-187/1627/64
3/8-189/169/16
1/2-1445/6411/16
3/4-1429/3257/64
1 - 11
1
/
2
1
9
/
64
1
1
/
8
1
1
/
4
-
11
1
/
2
1
31
/
64
1
15
/
32
1
1
/
2
-
11
1
/
2
1
23
/
32
1
45
/
64
2
-
11
1
/
2
2
3
/
16
2
11
/
64
Pipe Tap Drill Chart
Nominal
Pipe Tap
Size
NPSMNPSCNPSF
1/16-27-1/4D
1/8-27TQR
1/4-1815/327/167/16
3/8-18.60337/6437/64
1/2-1419.0MM45/6445/64
3/4-1461/6459/6459/64
1 - 11
1
/
2
1
13
/
64
1
5
/
32
1
5
/
32
1
1
/
4
-
11
1
/
2
1
35
/
64
1
1
/
2
-
1
1
/
2
-
11
1
/
2
1
25
/
32
1
47
/
64
-
2
-
11
1
/
2
2
1
/
4
2
13
/
64
-
Tap Drill Chart(Metric H6)
Tap SizeCut Tap DrillRoll Tap DrillMinor ØMajor Ø
0-803/64.04691.35mm.0531.0465/.0514.060
1-72#53.05951.7mm.0669.0580/.0635.073
1-64#53.05951.65mm.0650.0561/.0623.073
2-64#50.0702.0mm.0787.0691/.0753.086
2-56#50.0705/64.0781.0667/.0737.086
3-48#47.0785#43.089.0764/.0845.099
3-56#45.08202.3mm.0906.0797/.0865.099
4-40#43.0890#39.0995.0849/.0939.112
4-48#42.09352.6mm.1024.0894/.0968.112
5-40#38.1015#33.1130.0979/.1062.125
5-44#37.10402.9mm.1142.1004/.1079.125
6-32#36.10653.1mm.1220.104/.114.138
6-40#33.11303.2mm.1260.111/.119.138
8-36#29.1360#26.1520.134/.142.164
8-32#29.1360#25.1495.130/.139.164
10-24#25.149511/64.1719.145/.156.190
10-32#21.1590#16.1770.156/.164.190
12-24#16.17705.0mm.1968.171/.181.216
12-28#14.1820#8.1990.177/.186.216
12-323/16.1875**.182/.190.216
1/4-20#7.2010#1.2280.196/.207.250
1/4-28#3.2130A.2340.211/.220.250
1/4-327/32.2188**.216/.224.250
5/16-18F.2570L.2880.252/.265.312
5/16-24I.2720M.2950.267/.277.312
5/16-329/32.2813**.279/.286.312
3/8-165/16.3120S.3480.307/.321.375
3/8-24Q.3320T.3580.330/.340.375
3/8-3211/32.3438**.341/.349.375
Tap SizeCut Tap DrillRoll Tap DrillMinor ØMajor Ø
M1.6 x .351.25.04921.45.05711.221/1.321.0481/.05201.6.0630
M1.8 x .351.45.0571#51.06701.371/1.421.0540/.05591.8.0709
M2 x .41.6.06301.8.07091.567/1.679.0620/.06612.0.0787
M2.2 x .451.75.06892.0.07871.648/1.713.0649/.06742.2.0866
M2.5 x .452.05.08072.3.09062.013/2.138.0793/.08422.5.0984
M3 x .52.5.09847/64.10942.459/2.599.0968/.10233.0.1181
M3.5 x .62.9.11423.2.12602.850/3.010.1122/.11853.5.1378
M4 x .73.3.12993.7.14573.242/3.422.1276/.13474.0.1575
M4.5 x .753.7.14574.1.16143.580/3.688.1406/.14524.5.1772
M5 x .84.2.1654#14.1824.134/4.334.1628/.17065.0.1969
M6 x 1.05.0.19697/32.21884.917/5.153.1936/.20296.0.2362
M7 x 1.06.0.2362F.25705.773/5.917.2273/.23307.0.2756
M8 x 1.256.7
.26387.4.29136.647/6.912.2617/.27218.0.3150
M8 x 1.07.0.275619/64.29696.917/7.153.2723/.28168.0.3150
M10 x 1.58.5.3346U.36808.376/8.676.3298/.341610.0.3937
M10 x 1.258.7.34259.4.37018.647/8.912.3404/.350910.0.3937
M12 x 1.7510.2.401611.2.440910.106/10.441.3979/.411112.0.4724
M12 x 1.2510.8.425211.5.452810.647/10.912.4192/.429614.0.5512
M14 x 2.012.0.472433/64.515611.835/12.210.4659/.480716.0.6299
M16 x 2.014.0.551219/32.593813.835/14.210.5447/.559418.0.7087
M16 x 1.514.5.570915.25.600414.376/14.676.5660/.577818.0.7087
M18 x 2.515.5.610239/64.609414.933/15.394.5879/.606118.0.7087
M18 x 1.516.5.649617.25.679116.376/16.676.6447/.656520.0.7874
M20 x 2.517.5.689018.75.738217.294/17.744.6809/.698620.0.7874
M20 x 1.518.5.728319.25.757918.376/18.676.7235/.735320.0.7874
M22 x 2.519.5.7677**19.294/19.744
.7596/.777322.0.8661
M22 x 1.520.5.8071**20.376/20.676.8022/.814022.0.8661
M24 x 3.021.0.8268**20.752/21.252.8170/.836724.0.9449
M24 x 2.022.0.8661**21.835/22.210.8596/.874424.0.9449
M27 x 3.024.0.9449**23.752/24.252.9351/.954827.01.0630
M27 x 2.025.0.9843**24.835/25.210.9778/.992527.01.0630
M30 x 3.526.51.0433**26.211/26.7711.0319/1.054030.01.1811
M30 x 2.028.01.1024**27.835/28.2101.0959/1.110630.01.1811
M33 x 3.529.51.1614**28.706/29.2111.1302/1.150033.01.2992
M33 x 2.031.01.2205**30.835/31.2101.2140/1.228733.01.2992
M36 x 4.032.01.2598**31.670/32.2701.2469/1.270536.01.4173
M36 x 3.033.01.2992**31.093/31.6701.2241/1.246936.01.4173
M39 x 4.035.01.3780**34.093/34.6701.3422/1.365039.01.5354
M39 x 3.036.01.4173**35.319/35.7521.3905/1.407639.01.5354
Tap SizeCut Tap DrillRoll Tap DrillMinor ØMajor Ø
7/16-14U.368013/32.4062.360/.380.437
7/16-2025/64.3906Z.4130.383/.395.437
7/16-28Y.4040**.299/.407.437
1/2-1327/64.421915/32.4688.417/.434.500
1/2-2029/64.453112.25mm.4823.446/.457.500
1/2-2815/32.4688**.461/.470.500
9/16-1231/64.484417/32.5312.472/.490.562
9/16-181/2.50013.5mm.5315.502/.515.562
9/16-2433/64.5156**.517/.527.562
5/8-1117/32.531314.75mm.5807.527/.546.625
5/8-189/16.562515.25mm.6004.565/.578.625
5/8-2437/64.5781**.580/.590.625
11/16-1239/64.6094**.597/.615.687
11/16-2441/64.6406**.642/.652.687
3/4-1021/32.656345/64.7031.642/.663.750
3/4-1611/16.687523/32.7188.682/.696.750
3/4-2045/64.7031**.696/.707.750
13/16-1247/64.7344**.722/.740.812
13/16-163/4.750**.745/.759.812
13/16-2049/64.7656**.758/.770.812
7/8-949/64.7656**.755/.778.875
7/8-1451/64.7969**.798/.814.875
7/8-2053/64.8281**.821/.832.875
15/16-1255/64.8594**.847/.865.937
15/16-167/8.8750**.870/.884.937
15/16-2057/64.8906**.883/.895.937
1 - 87/8.8750**.865/.8901
1 - 1259/64.9219**.910/.9281
1 - 2061/64.9531**.946/.9571
Italics = Metric
* - Form Tap not available or not standard. Check
with Tap Manufacturer for required Drill Size.
