Login Items in Cart: 0 
New Customer? View Cart
Checkout Subtotal: $0.00
Standard Drill Sizes
Facebook Icon Twitter Icon

 
tables of standard tap and drill sizes
All Standard Drill Size Bushings Are indicated in Green

DrillDecimalDrillDecimalDrillDecimalDrillDecimalDrillDecimal
80.0135"70.0280"60.0400"51.0670"3/32.0938"
79.0145"69.0292"59.0410"50.0700"41.0960"
1/64.0156"68.0310"58.0420"49.0730"40.0980"
78.0160"1/32.0313"57.0430"48.0760"39.0995"
77.0180"67.0320"56.0465"5/64.0781"38.1015"
76.0200"66.0330"3/64.0469"47.0785"37.1040"
75.0210"65.0350"55.0520"46.0810"36.1065"
74.0225"64.0360"54.0550"45.0820"7/64.1094"
73.0240"63.0370"53.0595"44.0860"35.1100"
72.0250"62.0380"1/16.0625"43.0890"34.1110"
71.0260"61.0390"52.0635"42.0935"33.1130"


DrillDecimalDrillDecimalDrillDecimalDrillDecimalDrillDecimal
32.1160"23.1540"14.1820"5.2055"E.2500"
31.1200"5/32.1562"13.1850"4.2090"1/4.2500"
1/8.1250"22.1570"3/16.1875"3.2130"F.2570"
30.1285"21.1590"12.1890"7/32.2188"G.2610"
29.1360"20.1610"11.1910"2.2210"17/64.2656"
28.1405"19.1660"10.1935"1.2280"H.2660"
9/64.1406"18.1695"9.1960"A.2340"I.2720"
27.1440"11/64.1719"8.1990"15/64.2344"J.2770"
26.1470"17.1730"7.2010"B.2380"K.2810"
25.1495"16.1770"13/64.2031"C.2420"9/32.2812"
24.1520"15.1800"6.2040"D.2460"L.2900"


DrillDecimalDrillDecimalDrillDecimalDrillDecimalDrillDecimal
M.2950"23/64.3594"29/64.4531"41/64.6406"53/64.8281"
19/64.2969"U.3680"15/32.4688"21/32.6562"27/32.8438"
N.3020"3/8.3750"31/64.4844"43/64.6719"55/64.8594"
5/16.3125"V.3770"1/2.5000"11/16.6875"7/8.8750"
O.3160"W.3860"33/64.5156"45/64.7031"57/64.8906"
P.3230"25/64.3906"17/32.5313"23/32.7188"29/32.9062"
21/64.3281"X.3970"35/64.5469"47/64.7344"59/64.9219"
Q.3320"Y.4040"9/16.5625"3/4.7500"15/16.9375"
R.3390"13/32.4062"37/64.5781"49/64.7656"61/64.9531"
11/32.3438"Z.413019/32.5938"25/32.7812"31/32.9688"
S.3480"27/64.4219"39/64.6094"51/64.7969"63/64.9844"
T.3580"7/16.4375"5/8.6250"13/16.8125"11.000"

 

Thread Size/ Tap Drill Size
*Indicates Size of drill to be used before tapping

American Standard ThreadISO Metric Thread
Thread SizeTap Drill Size (in.)*Thread SizeTap Drill Size(mm)*
0-803/64M1 x 0.250.75
1-6453M1.1 x 0.250.85
1-7253M1.2 x 0.250.95
2-5651M1.4 x 0.31.10
2-6450M1.6 x 0.351.25
3-485/64M1.8 x 0.351.45
3-5646M2 x 0.41.60
4-4043M2.2 x 0.451.75
4-4842M2.5 x 0.452.05
5-4039M3 x 0.52.50

 

American Standard ThreadISO Metric Thread
Thread SizeTap Drill Size (in.)*Thread SizeTap Drill Size(mm)*
5-4437M3.5 x 0.62.90
6-3236M4 x 0.73.30
6-4033M4.5 x 0.753.70
8-3229M5 x 0.84.20
8-3629M6 x 15.00
10-2425M7 x 16.00
10-3221M8 x 1.256.80
12-2417M9 x 1.257.80
12-2815M10 x 1.58.50
1/4-207M11 x 1.59.50

 

American Standard ThreadISO Metric Thread
Thread SizeTap Drill Size (in.)*Thread SizeTap Drill Size(mm)*
1/4-283M12 x 1.7510.20
5/16-18FM14 x 212.00
5/16-24IM16 x 214.00
3/8-165/16M18 x 2.515.50
3/8-24QM20 x 2.517.50
7/16-14UM22 x 2.519.50
7/16-20WM24 x 321.00
1/2-1327/64M27 x 3 24.00
1/2-2029/64M30 x 3.526.50
9/16-1231/64M33 x 3.529.50

American Standard ThreadISO Metric Thread
Thread SizeTap Drill Size (in.)*Thread SizeTap Drill Size(mm)*
9/16-1833/64M36 x 432.00
5/8-1117/32M39 x 435.00
5/8-1837/64M42 x 4.537.50
3/4-1021/32M45 x 4.540.50
3/4-1611/16M48 x 543.00
7/8-949/64M52 x 547.00
7/8-1413/16M56 x 5.550.50
1"-87/8M60 x 5.554.50
1"-1415/18M64 x 658.00
M68 x 662.00