Decimal Equivalents

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Drill SizeDecimal Inches
970.0059
.15mm0.0059
960.0063
.16mm0.0063
950.0067
.17mm0.0067
940.0071
.18mm0.0071
930.0075
.19mm0.0075
920.0079
.2mm0.0079
910.0083
.21mm0.0083
900.0087
.22mm0.0087
890.0091
.23mm0.0091
.24mm0.0094
880.0095
.25mm0.0098
870.0100
.26mm0.0102
860.0105
.27mm0.0106
850.0110
.28mm0.0110
.29mm0.0114
840.0115
.3mm0.0118
830.0120
820.0125
.32mm0.0126
810.0130
.34mm0.0134
800.0135
.35mm0.0138
.36mm0.0142
790.0145
.38mm0.0150
1/640.0156
.4mm0.0157
780.0160
.42mm0.0165
.44mm0.0173
.45mm0.0177
770.0180
.46mm0.0181
.48mm0.0189
.5mm0.0197
760.0200
750.0210
.55mm0.0217
740.0225
.6mm0.0236
730.0240
720.0250
.65mm0.0256
710.0260
.7mm0.0276
700.0280
690.0292
.75mm0.0295
680.0310
1/320.0312
.8mm0.0315
670.0320
660.0330
.85mm0.0335
650.0350
.9mm0.0354
640.0360
630.0370
.95mm0.0374
620.0380
610.0390
1mm0.0394
600.0400
590.0410
1.05mm0.0413
Drill SizeDecimal InchesTap Size
580.0420
570.0430
1.1mm0.0433
1.15mm0.0453
560.0465
3/640.0469#0-80
1.2mm0.0472
1.25mm0.0492M1.6×0.35
1.3mm0.0512
550.0520
1.35mm0.0531
540.0550
1.4mm0.0551
1.45mm0.0571M1.8×0.35
1.5mm0.0591
530.0595#1-64,72
1.55mm0.0610
1/160.0625
1.6mm0.0630M2x0.4
520.0635
1.65mm0.0650
1.7mm0.0669
510.0670#2-56
1.75mm0.0689M2.2×0.45
500.0700#2-64
1.8mm0.0709
1.85mm0.0728
490.0730
1.9mm0.0748M2.3x.04
480.0760
1.95mm0.0768
5/640.0781
470.0785#3-48
2mm0.0787
2.05mm0.0807M2.5×0.45
460.0810
450.0820#3-56
2.1mm0.0827
2.15mm0.0846M2.6×0.45
440.0860#4-36
2.2mm0.0866
2.25mm0.0886
430.0890#4-40
2.3mm0.0906
2.35mm0.0925
420.0936#4-48
3/320.0938
2.4mm0.0945
410.0960
2.45mm0.0965
400.0980
2.5mm0.0984M3x0.5
390.0995
380.1015#5-40
2.6mm0.1024
370.1040#5-44
2.7mm0.1063
360.1065#6-32
2.75mm0.1083
7/640.1094
350.1100
2.8mm0.1102
340.1110
330.1130#6-40
2.9mm0.1142M3.5×0.6
320.1160
3mm0.1181
310.1200
3.1mm0.1220
1/80.12505/32-32NS
3.2mm0.1260
3.25mm0.1280
300.12855/32-36NS
3.3mm0.1299M4x0.70
3.4mm0.1339
290.1360#8-32
3.5mm0.1378
280.1405
9/640.1406
3.6mm0.1417
Drill SizeDecimal InchesTap Size
270.1440
3.7mm0.1457
260.14703/16-24NS
3.75mm0.1476M4.5×0.75
250.1495#10-24
3.8mm0.1496
240.1520
3.9mm0.1535
230.1540
5/320.1562
220.15703/16-32NS
4mm0.1575
210.1590#10-32
200.1610
4.1mm0.1614
4.2mm0.1654M5x0.8
190.1660
4.25mm0.1673
4.3mm0.1693
180.1695
11640.1719
170.1730
4.4mm0.1732
160.1770#12-24
4.5mm0.1772
150.1800
4.6mm0.1811
140.1820#12-28
130.1850
4.7mm0.1850
4.75mm0.1870
3/160.1875
4.8mm0.1890
120.18907/32-32NS
110.1910
4.9mm0.1929
100.1935
90.1960
5mm0.1969M6x1
80.1990
5.1m0.2008
70.20101/4-20
13640.2031
60.2040
5.2mm0.2047
50.2055
5.25mm0.2067M6x0.75
5.3mm0.2087
40.20901/4-24
5.4mm0.2126
30.21301/4-28
5.5mm0.2165
7/320.2188
5.6mm0.2205
20.2210
5.7mm0.2244
5.75mm0.2264
10.2280
5.8mm0.2283
5.9mm0.2323
A0.2340
15640.2344
6mm0.2362M7x1
B0.2380
6.1mm0.2402
C0.2420
6.2mm0.2441
D0.2460
6.25mm0.24611/16-27NPT
6.3mm0.2480
E0.25001/16-27NPT
1/40.2500
6.4mm0.2520
6.5mm0.2559
F0.25705/16-18NC
6.6mm0.2598
G0.2610
6.7mm0.2638
17640.2656
6.75mm0.2657M8x1.25
Drill SizeDecimal InchesTap Size
H0.2660
6.8mm0.2677
6.9mm0.2717
I0.27205/16-24NF
7mm0.2756M8x1
J0.2770
7.1mm0.2795
K0.2810
9/320.28125/16-32NS
7.2mm0.2835
7.25mm0.2854
7.30mm0.2874
L0.2900
7.4mm0.2913
M0.2950
7.5mm0.2953
19/640.2969
7.6mm0.2992
N0.3020
7.7mm0.3031
7.75mm0.3051M9x1.25
7.8mm0.3071
7.9mm0.3110
5/160.31253/8-16NC
8mm0.3150
O0.3160
8.1mm0.3189
8.2mm0.3228
P0.3230
8.25mm0.3248
8.3mm0.3268
21/640.3281
8.4mm0.3307
Q0.33203/8-24NF
8.5mm0.3346M10x1.5
8.6mm0.3386
R0.33901/8-27NPT
8.7mm0.3425
11/320.3438
8.75mm0.3445M10x1.25
8.8mm0.3465
S0.34801/8-27NPT
8.9mm0.3504
9mm0.3543M10x1.00
T0.3580
9.1mm0.3583
23/640.3594
9.2mm0.3622
9.25mm0.3642
9.3mm0.3661
U0.36807/16-14NC
9.4mm0.3701
9.5mm0.3740M11x1.50
3/80.3750
V0.3770
9.6mm0.3780
9.7mm0.3819
9.75mm0.3839
9.8mm0.3858
W0.3860
9.9mm0.3998
25/640.39067/16-20
10mm0.3937M12x1.75
X0.3970
Y0.4040
13/320.4062
Z0.4130
10.5mm0.4131M12x1.25
27/640.42191/2-13
11mm0.4331
7/160.43751/4-18NPT
11.5mm0.4528
29/640.45311/4-18NPT 1/2-20
15/320.4688
12mm0.4724M14x2
31/640.48449/16-12
12.5mm0.4921M14x1.5
1/20.5000
13mm0.5118M14x1.25
33/640.51569/16-18
Drill SizeDecimal InchesTap Size
17/320.53125/8-11
13.5mm0.5315
35/640.5469
14mm0.5512m16x2
9/160.5625
14.5mm0.5709M16x1.5
37/640.57813/8-18NPT 5/8-18NF
15mm0.5906
19/320.59383/8-18NPS
39/640.6094
15.5mm0.6102M18x2.5
5/80.625011/16-16NS
16mm0.6299M18x20
41/640.6406
16.5mm0.6496
21/320.65623/4-10NC
17mm0.6693
43/640.6719
11/160.68753/4-16NF
17.5mm0.6890M20x2.5
45/640.7031
18mm0.7087M20x2.0
23/320.71881/2-14NPT
18.5mm0.7283M20x1.5
47/640.73441/2-14NPS
19mm0.7480
3/40.7500
49/640.76567/8-9NC
19.5mm0.7677M22x2.5
25/320.7812
20mm0.7874M22x2.0
51/640.7969
20.5mm0.8071M22x1.5
13/160.81257/8-14NF
21mm0.8268M24x3
53/640.8281
27/320.8438
21.5mm0.8465
55/640.8594
22mm0.8661M24x2
7/80.87501-8NC
22.25mm0.8760
22.5mm0.8858M24x1.50
57/640.8906
23mm0.9055
29/320.9062
59/640.92193/4-14NPT
23.5mm0.9252
15/160.93753/4-14NPS
24mm0.9449>M27x3
61/640.9531
24.5mm0.9646
31/320.9688
25mm0.9843M27x2
63/640.98441-1/8-7NC
11.00
25.5mm1.0039
1-1/641.0156
26mm1.0236
1-1/321.0312
26.5mm1.0433M30x3.5
1-3/641.04691-1/8-12NF
1-1/161.0625
27mm1.0630
1-5/641.0781
27.5mm1.0827
1-3/321.0938
28mm1.1024M30x2.0
1-7/641.10941-1/4-7NC
28.5mm1.1220
1-1/81.1250
1-9/641.1406
29mm1.1417
1-5/321.15621-11-1/2NPT
29.5mm1.1614
1-11/641.17191-1/4-12NF