|
Standard Drill Sizes
Decimal
Inch |
USA
Fraction |
USA
Number/
Letter |
Metric |
| .0135 |
|
#80 |
|
| .0138 |
|
|
.35mm |
| .0145 |
|
#79 |
|
| .0150 |
|
|
.38mm
|
| .0156 |
1/64
|
|
|
| .0157 |
|
|
.40mm
|
| .0160 |
|
#78 |
|
| .0165 |
|
|
.42mm
|
| .0177 |
|
|
.45mm
|
| .0180 |
|
#77 |
|
| .0189 |
|
|
.48mm
|
| .0197 |
|
|
.50mm
|
| .0200 |
|
#76 |
|
| .0210 |
|
#75 |
|
| .0217 |
|
|
.55mm
|
| .0225 |
|
#74 |
|
| .0236 |
|
|
.60mm
|
| .0240 |
|
#73 |
|
| .0250 |
|
#72 |
|
| .0256 |
|
|
.65mm
|
| .0260 |
|
#71 |
|
| .0276 |
|
|
.70mm
|
| .0280 |
|
#70 |
|
| .0292 |
|
#69 |
|
| .0295 |
|
|
.75mm
|
| .0310 |
|
#68 |
|
| .0312 |
1/32
|
|
|
| .0315 |
|
|
.80mm
|
| .0320 |
|
#67 |
|
| .0330 |
|
#66 |
|
| .0335 |
|
|
.85mm
|
| .0350 |
|
#65 |
|
| .0354 |
|
|
.90mm
|
| .0360 |
|
#64 |
|
| .0370 |
|
#63 |
|
| .0374 |
|
|
.95mm
|
| .0380 |
|
#62 |
|
| .0390 |
|
#61 |
|
| .0394 |
|
|
1.00mm
|
| .0400 |
|
#60 |
|
| .0410 |
|
#59 |
|
| .0413 |
|
|
1.05mm
|
| .0420 |
|
#58 |
|
| .0430 |
|
#57 |
|
| .0433 |
|
|
1.10mm
|
| .0453 |
|
|
1.15mm
|
| .0465 |
|
#56 |
|
| .0469 |
3/64
|
|
|
| .0472 |
|
|
1.20mm
|
| .0492 |
|
|
1.25mm
|
| .0512 |
|
|
1.30mm
|
| .0520 |
|
#55 |
|
| .0531 |
|
|
1.35mm
|
| .0550 |
|
#54 |
|
| .0551 |
|
|
1.40mm |
| .0571 |
|
|
1.45mm
|
| .0591 |
|
|
1.50mm
|
| .0595 |
|
#53 |
|
| .0610 |
|
|
1.55mm
|
| .0625 |
1/16
|
|
|
| .0630 |
|
|
1.60mm
|
| .0635 |
|
#52 |
|
| .0650 |
|
|
1.65mm
|
| .0669 |
|
|
1.70mm
|
| .0670 |
|
#51 |
|
| .0689 |
|
|
1.75mm
|
| .0700 |
|
#50 |
|
| .0709 |
|
|
1.80mm
|
| .0728 |
|
|
1.85mm
|
| .0730 |
|
#49 |
|
| .0748 |
|
|
1.90mm
|
| .0760 |
|
#48 |
|
| .0768 |
|
|
1.95mm
|
| .0781 |
5/64
|
|
|
| .0785 |
|
#47 |
|
| .0787 |
|
|
2.00mm
|
| .0807 |
|
|
2.05mm
|
| .0810 |
|
#46 |
|
| .0820 |
|
#45 |
|
| .0827 |
|
|
2.10mm
|
| .0846 |
|
|
2.15mm
|
| .0860 |
|
#44 |
|
| .0866 |
|
|
2.20mm
|
| .0886 |
|
|
2.25mm |
| .0890 |
|
#43 |
|
| .0906 |
|
|
2.30mm
|
| .0925 |
|
|
2.35mm
|
| .0935 |
|
#42 |
|
| .0938 |
3/32 |
|
|
| .0945 |
|
|
2.40mm
|
| .0960 |
|
#41 |
|
| .0965 |
|
|
2.45mm
|
| .0980 |
|
#40 |
|
| .0984 |
|
|
2.50mm
|
| .0995 |
|
#39 |
|
| .1004 |
|
|
2.55mm
|
| .1015 |
|
#38 |
|
| .1024 |
|
|
2.60mm
|
| .1040 |
|
#37 |
|
| .1043 |
|
|
2.65mm
|
| .1063 |
|
|
2.70mm
|
| .1065 |
|
#36 |
|
| .1083 |
|
|
2.75mm
|
| .1094 |
7/64
|
|
|
| .1100 |
|
#35 |
|
| .1102 |
|
|
2.80mm
|
| .1110 |
|
#34 |
|
| .1130 |
|
#33 |
|
| .1142 |
|
|
2.90mm
|
| .1160 |
|
#32 |
|
| .1181 |
|
|
3.00mm
|
| .1200 |
|
#31 |
|
| .1220 |
|
|
3.10mm
|
| .1250 |
1/8
|
|
|
| .1260 |
|
|
3.20mm
|
| .1280 |
|
|
3.25mm
|
| .1285 |
|
#30 |
|
| .1299 |
|
|
3.30mm
|
| .1339 |
|
|
3.40mm
|
| .1360 |
|
#29 |
|
| .1378 |
|
|
3.50mm
|
| .1405 |
|
#28 |
|
| .1406 |
9/64
|
|
|
| .1417 |
|
|
3.60mm
|
| .1440 |
|
#27 |
|
| .1457 |
|
|
3.70mm
|
| .1470 |
|
#26 |
|
| .1476 |
|
|
3.75mm
|
| .1495 |
|
#25 |
|
| .1496 |
|
|
3.80mm
|
| .1520 |
|
#24 |
|
| .1535 |
|
|
3.90mm |
| .1540 |
|
#23 |
|
| .1562 |
5/32
|
|
|
| .1570 |
|
#22 |
— |
| .1575 |
|
|
4.00mm
|
| .1590 |
|
#21 |
|
| .1610 |
|
#20 |
|
| .1614 |
|
|
4.10mm
|
| .1654 |
|
|
4.20mm
|
| .1660 |
|
#19 |
|
| .1673 |
|
|
4.25mm
|
| .1693 |
|
|
4.30mm
|
| .1695 |
|
#18 |
|
| .1719 |
11/64
|
|
|
| .1730 |
|
#17 |
|
| .1732 |
|
|
4.40mm
|
| .1770 |
|
#16 |
|
| .1772 |
|
|
4.50mm
|
| .1800 |
|
#15 |
|
| .1811 |
|
|
4.60mm
|
| .1850 |
|
#13 |
4.70mm
|
| .1870 |
|
|
4.75mm
|
| .1875 |
3/16
|
|
|
| .1890 |
|
#12 |
|
| .1910 |
|
#11 |
|
| .1929 |
|
|
4.90mm
|
| .1935 |
|
#10 |
|
| .1960 |
|
#9 |
|
| .1969 |
|
|
5.00mm
|
| .1990 |
|
#8 |
|
| .2008 |
|
|
5.10mm
|
| .2010 |
|
#7 |
|
| .2031 |
13/64
|
|
|
| .2040 |
|
#6 |
|
| .2047 |
|
|
5.20mm
|
| .2055 |
|
#5 |
|
| .2067 |
|
|
5.25mm
|
| .2087 |
|
|
5.30mm
|
| .2090 |
|
#4 |
|
| .2126 |
|
|
5.40mm
|
| .2130 |
|
#3 |
|
| .2165 |
|
|
5.50mm
|
| .2188 |
7/32
|
|
|
| .2205 |
|
|
5.60mm
|
| .2210 |
|
#2 |
|
| .2244 |
|
|
5.70mm
|
| .2264 |
|
|
5.75mm
|
| .2280 |
|
#1 |
|
| .2283 |
|
|
5.80mm
|
| .2323 |
|
|
5.90mm
|
| .2340 |
|
A |
|
| .2344 |
15/64
|
|
|
| .2362 |
|
|
6.00mm
|
| .2380 |
|
B |
|
| .2402 |
|
|
6.10mm
|
| .2420 |
|
C |
|
| .2441 |
|
|
6.20mm
|
| .2460 |
|
D |
|
| .2461 |
|
|
6.25mm
|
| .2480 |
|
|
6.30mm
|
| .2500 |
1/4
|
E |
|
| .2520 |
|
|
6.40mm
|
| .2559 |
|
|
6.50mm
|
| .2570 |
|
F |
|
| .2598 |
|
|
6.60mm
|
| .2610 |
|
G |
|
| .2638 |
|
|
6.70mm
|
| .2656 |
17/64
|
|
|
| .2657 |
|
|
6.75mm
|
| .2660 |
|
H |
|
| .2677 |
|
|
6.80mm
|
| .2717 |
|
|
6.90mm
|
| .2720 |
|
I |
|
| .2756 |
|
|
7.00mm |
| .2770 |
|
J |
|
| .2795 |
|
|
7.10mm
|
| .2810 |
|
K |
|
| .2812 |
9/32
|
|
|
| .2835 |
|
|
7.20mm
|
| .2854 |
|
|
7.25mm
|
| .2874 |
|
|
7.30mm
|
| .2900 |
|
L |
|
| .2913 |
|
|
7.40mm
|
| .2950 |
|
M |
|
| .2953 |
|
|
7.50mm
|
| .2969 |
19/64
|
|
|
| .2992 |
|
|
7.60mm
|
| .3020 |
|
N |
|
| .3031 |
|
|
7.70mm
|
| .3051 |
|
|
7.75mm
|
| .3071 |
|
|
7.80mm
|
| .3110 |
|
|
7.90mm
|
| .3125 |
5/16
|
|
|
| .3150 |
|
|
8.00mm
|
| .3160 |
|
O |
|
| .3189 |
|
|
8.10mm
|
| .3228 |
|
|
8.20mm
|
| .3230 |
|
P |
|
| .3248 |
|
|
8.25mm
|
| .3268 |
|
|
8.30mm
|
| .3281 |
21/64 |
|
|
| .3307 |
|
|
8.40mm
|
| .3320 |
|
Q |
|
| .3346 |
|
|
8.50mm
|
| .3386 |
|
|
8.60mm
|
| .3390 |
|
R |
|
| .3425 |
|
|
8.70mm
|
| .3438 |
11/32
|
|
|
| .3445 |
|
|
8.75mm
|
| .3465 |
|
|
8.80mm |
| .3480 |
|
S |
|
| .3504 |
|
|
8.90mm
|
| .3543 |
|
|
9.00mm
|
| .3580 |
|
T |
|
| .3583 |
|
|
9.10mm |
| .3594 |
23/64
|
|
|
| .3622 |
|
|
9.20mm
|
| .3642 |
|
|
9.25mm
|
| .3661 |
|
|
9.30mm
|
| .3680 |
|
U |
|
| .3701 |
|
|
9.40mm
|
| .3740 |
|
|
9.50mm
|
| .3750 |
3/8
|
|
|
| .3770 |
|
V |
|
| .3780 |
|
|
9.60mm
|
| .3819 |
|
|
9.70mm
|
| .3839 |
|
|
9.75mm
|
| .3858 |
|
|
9.80mm
|
| .3860 |
|
W |
|
| .3898 |
|
|
9.90mm
|
| .3906 |
25/64
|
|
|
| .3937 |
|
|
10.00mm
|
| .3970 |
|
X |
|
| .4016 |
|
|
10.20mm
|
| .4040 |
|
Y |
|
| .4062 |
13/32
|
|
|
| .4130 |
|
Z |
|
| .4134 |
|
|
10.50mm
|
| .4219 |
27/64
|
|
|
| .4252 |
|
|
10.80mm
|
| .4331 |
|
|
11.00mm
|
| .4375 |
7/16
|
|
|
| .4409 |
|
|
11.20mm
|
| .4528 |
|
|
11.50mm
|
| .4531 |
29/64
|
|
|
| .4646 |
|
|
11.80mm
|
| .4688 |
15/32
|
|
|
| .4724 |
|
|
12.00mm
|
| .4803 |
|
|
12.20mm
|
| .4844 |
31/64
|
|
|
| .4921 |
|
|
12.50mm
|
| .5000 |
1/2
|
|
|
| .5118 |
|
|
13.00mm
|
| .5156 |
33/64
|
|
|
| .5312 |
17/32
|
|
|
| .5315 |
|
|
13.50mm
|
| .5469 |
35/64
|
|
|
| .5512 |
|
|
14.00mm
|
| .5625 |
9/16
|
|
|
| .5709 |
|
|
14.50mm
|
| .5781 |
37/64
|
|
|
| .5906 |
|
|
15.00mm
|
| .5938 |
19/32
|
|
|
| .6094 |
39/64
|
|
|
| .6102 |
|
|
15.50mm
|
| .6250 |
5/8
|
|
|
| .6299 |
|
|
16.00mm
|
| .6406 |
41/64
|
|
|
| .6496 |
|
|
16.50mm
|
| .6562 |
21/32
|
|
|
| .6693 |
|
|
17.00mm
|
| .6719 |
43/64
|
|
|
| .6875 |
11/16
|
|
|
| .6890 |
|
|
17.50mm
|
| .7087 |
|
|
18.00mm
|
| .7031 |
45/64 |
|
|
| .7188 |
23/32
|
|
|
| .7283 |
|
|
18.50mm
|
| .7344 |
47/64 |
|
|
| .7480 |
|
|
19.00mm
|
| .7500 |
3/4
|
|
|
| .7656 |
49/64
|
|
|
| .7677 |
|
|
19.50mm
|
| .7812 |
25/32
|
|
|
| .7874 |
|
|
20.00mm
|
| .7969 |
51/64
|
|
|
| .8071 |
|
|
20.50mm
|
| .8125 |
13/16
|
|
|
| .8268 |
|
|
21.00mm
|
| .8281 |
53/64
|
|
|
| .8438 |
27/32
|
|
|
| .8465 |
|
|
21.50mm
|
| .8594 |
55/64
|
|
|
| .8661 |
|
|
22.00mm
|
| .8750 |
7/8
|
|
|
| .8858 |
|
|
22.50mm
|
| .8906 |
57/64
|
|
|
| .9055 |
|
|
23.00mm
|
| .9062 |
29/32
|
|
|
| .9219 |
59/64
|
|
|
| .9252 |
|
|
23.50mm
|
| .9375 |
15/16
|
|
|
| .9449 |
|
|
24.00mm
|
| .9531 |
61/64
|
|
|
| .9646 |
|
|
24.50mm
|
| .9688 |
31/32
|
|
|
| .9843 |
|
|
25.00mm
|
| .9844 |
63/64
|
|
|
| 1.0000 |
|
1 |
|
| 1.0156 |
1-1/64 |
|
|
| 1.0236 |
|
|
26.00mm |
| 1.0312 |
1-1/32 |
|
|
| 1.0469 |
1-3/64 |
|
|
| 1.0625 |
1-1/16 |
|
|
| 1.0630 |
|
|
27.00mm |
| 1.0781 |
1-5/64 |
|
|
| 1.0938 |
1-3/32 |
|
|
| 1.1024 |
|
|
28.00mm |
| 1.1094 |
1-7/64 |
|
|
| 1.1250 |
1-1/8 |
|
|
| 1.1406 |
1-9/64 |
|
|
| 1.1417 |
|
|
29.00mm |
| 1.1562 |
1-5/32 |
|
|
| 1.1719 |
1-11/64 |
|
|
| 1.1811 |
|
|
30.00mm |
| 1.1875 |
1-3/16 |
|
|
| 1.2031 |
1-13/64 |
|
|
| 1.2188 |
1-7/32 |
|
|
| 1.2205 |
|
|
31.00mm |
| 1.2344 |
1-15/64 |
|
|
| 1.2500 |
1-1/4 |
|
|
| 1.2598 |
|
|
32.00mm |
| 1.2656 |
1-17/64 |
|
|
| 1.2812 |
1-9/32 |
|
|
| 1.2969 |
1-19/64 |
|
|
| 1.2992 |
|
|
33.00mm |
| 1.3125 |
1-5/16 |
|
|
| 1.3281 |
1-21/64 |
|
|
| 1.3386 |
|
|
34.00mm |
| 1.3438 |
1-11/32 |
|
|
| 1.3594 |
1-23/64 |
|
|
| 1.3750 |
1-3/8 |
|
|
| 1.3780 |
|
|
35.00mm |
| 1.3906 |
1-25/64 |
|
|
| 1.4062 |
1-13/32 |
|
|
| 1.4173 |
|
|
36.00mm |
| 1.4219 |
1-27/64 |
|
|
| 1.4375 |
1-7/16 |
|
|
| 1.4531 |
1-29/64 |
|
|
| 1.4567 |
|
|
37.00mm |
| 1.4688 |
1-15/32 |
|
|
| 1.4844 |
1-31/64 |
|
|
| 1.4961 |
|
|
38.00mm |
|
