Angeles Machine Works

Decimal Equivalents

Decimal Equivalents of Fraction,
Wire Gauge and Letter Size Drill

 

Tap Drill Sizes

Drill Size Decimal
800.0135
790.0145
1/640.0156
780.0160
770.0180
760.0200
750.0210
740.0225
730.0240
720.0250
710.0260
700.0280
690.0292
680.0310
1/320.0312
670.0320
660.0330
650.0350
640.0360
630.0370
620.0380
610.0390
600.0400
590.0410
580.0420
570.0430
560.0465
3/640.0469
550.0520
540.0550
530.0595
1/160.0625
520.0635
510.0670
500.0700
490.0730
480.0760
5/640.0781
470.0785
460.0810
450.0820
440.0860
430.0890
420.0935
3/320.0938
410.0960
400.0980
390.0995
380.1015
370.1040
360.1065
7/640.1094
350.1100
340.1110
330.1130
320.1160
310.1200
1/80.1250
300.1285
290.1360
280.1405
9/640.1406
270.1440
260.1470
250.1495
240.1520
230.1540
5/320.1562
220.1570
210.1590
200.1610
190.1660
180.1695
11/640.1719
170.1730
160.1770
150.1800
140.1820
130.1850
3/160.1875
120.1890
110.1910
100.1935
90.1960
80.1990
Drill Size Decimal
70.2010
13/640.2031
60.2040
50.2055
40.2090
30.2130
7/320.2188
20.2210
10.2280
A0.2340
15/640.2344
B0.2380
C0.2420
D0.2460
1/40.2500
E0.2500
F0.2570
G0.2610
17/640.2656
H0.2660
I0.2720
J0.2770
K0.2810
9/320.2812
L0.2900
M0.2950
19/640.2969
N0.3020
5/160.3125
O0.3160
P0.3230
21/640.3281
Q0.3320
R0.3390
11/320.3438
S0.3480
T0.3580
23/640.3594
U0.3680
3/80.3750
V0.3770
W0.3860
25/640.3906
X0.3970
Y0.4040
13/320.4062
Z0.4130
27/640.4219
7/160.4375
29/640.4531
15/320.4688
31/640.4844
1/20.5000
33/640.5156
17/320.5312
35/640.5469
9/160.5625
37/640.5681
19/320.5938
39/640.6094
5/80.6250
41/640.6406
21/320.6562
43/640.7619
11/160.6875
45/640.7031
23/320.7188
47/640.7344
3/40.7500
49/640.7656
25/320.7812
51/640.7969
13/160.8125
53/640.8281
27/320.8438
55/640.8594
7/80.8750
57/640.8906
29/320.9062
59/640.9219
15/160.9375
61/640.9531
31/320.9688
63/640.9844
11.0000
 
Thread Drill
0-80 3/64
1-64 53
1-72 53
2-56 50
2-64 50
3-48 47
3-56 45
4-40 43
4-48 42
5-40 38
5-44 37
6-32 36
6-40 33
8-32 29
8-36 29
10-24 25
10-32 21
12-24 16
12-28 14
1/4-20 7
1/4-28 3
5/16-18 F
5/16-24 I
3/8-16 5/16
3/8-24 Q
7/16-14 U
7/16-20 25/64
1/2-12 27/64
1/2-13 27/64
1/2-20 29/64
9/16-12 31/64
9/16-18 33/64
5/8-11 17/32
5/8-18 37/64
3/4-10 21/32
3/4-16 11/16
7/8-9 49/64
7/8-14 13/16
1-8 7/8
1-12 59/64
1-14 59/64
1-1/8-7 63/64