|
 These
conversion charts can also be downloaded as an Acrobat PDF
file.
Preferred Metric Diameters and Lengths
with equivalent inch dimensions
Lengths
| |
| mm |
10 |
12 |
16 |
20 |
25 |
30 |
35 |
40 |
45 |
50 |
55 |
60 |
65 |
| Inches |
3/8" |
1/2" |
5/8" |
3/4" |
1" |
1
1/4" |
1
1/4" |
1
1/2" |
1
3/4" |
2" |
2
1/4" |
2
3/8" |
2
1/2" |
|
|
| |
|
|
| |
| mm |
70 |
75 |
80 |
90 |
100 |
110 |
120 |
130 |
140 |
150 |
160 |
170 |
180 |
| Inches |
2
3/4" |
3" |
3
1/8" |
3
1/2" |
4" |
4
1/2" |
4
3/4" |
5" |
5
1/2" |
6" |
6
1/2" |
6
3/4" |
7" |
|
|
| |
|
|
| |
| mm |
190 |
200 |
220 |
240 |
260 |
280 |
300 |
325 |
350 |
375 |
400 |
| Inches |
7
1/2" |
8" |
8
1/2" |
9
1/2" |
10" |
11" |
12" |
12
3/4" |
13
3/4" |
14
3/4" |
16" |
|
|
Diameters
| |
| mm |
M6 |
M8 |
M10 |
M12 |
M16 |
M20 |
M24 |
M27 |
M30 |
| Inches |
1/4" |
5/16" |
3/8" |
1/2" |
5/8" |
3/4" |
1" |
1
1/8" |
1
1/4" |
|
|
Decimal Equivalent Chart
Fractions of an inch, Millimetres, Wood Screw
Gauge,
Imperial Standard Wire Gauge
| |
Inches
Decimals
|
Inches
Fractions |
mm |
Wood
Screw
Gauge |
Imperial
Standard
Wire
Gauge |
| .0124 |
|
|
|
30 |
| .0136 |
|
|
|
29 |
| .0148 |
|
|
|
28 |
| .0156 |
1/64 |
.3969 |
|
|
| .0164 |
|
|
|
27 |
|
.018 |
|
|
|
26 |
|
.020 |
|
|
|
25 |
|
.022 |
|
|
|
24 |
|
.024 |
|
|
|
23 |
|
.028 |
|
|
|
22 |
|
.031 |
1/32 |
.7938 |
|
|
|
.032 |
|
|
|
21 |
|
.036 |
|
|
|
20 |
|
.039 |
|
1.000 |
|
|
|
.040 |
|
|
|
19 |
|
.046 |
3/64 |
1.190 |
|
|
|
.048 |
|
|
|
18 |
|
.056 |
|
|
|
17 |
|
.060 |
|
1.52 |
0 |
|
|
.062 |
1/16 |
1.587 |
|
|
|
.064 |
|
|
|
16 |
|
.070 |
|
1.78 |
1 |
|
|
.072 |
|
|
|
15 |
|
.078 |
5/64 |
2.000 |
|
|
|
.080 |
|
|
|
14 |
|
.082 |
|
2.08 |
2 |
|
|
.092 |
|
|
|
13 |
|
.093 |
3/32 |
2.381 |
|
|
|
.094 |
|
2.39 |
3 |
|
| .104 |
|
|
|
12 |
|
.108 |
|
2.74 |
4 |
|
|
.109 |
7/64 |
2.778 |
|
|
|
.116 |
|
|
|
11 |
|
.118 |
|
3.000 |
|
|
|
.122 |
|
3.10 |
5 |
|
|
.125 |
1/8 |
3.175 |
|
|
|
.128 |
|
|
|
10 |
|
.136 |
|
3.45 |
6 |
|
|
.140 |
9/64 |
3.571 |
|
|
|
.144 |
|
|
|
9 |
|
.150 |
|
3.81 |
7 |
|
|
.156 |
5.32 |
3.968 |
|
|
|
.157 |
|
4.000 |
|
|
|
.160 |
|
|
|
8 |
|
.164 |
|
4.17 |
8 |
|
|
.171 |
11/64 |
4.365 |
|
|
|
.176 |
|
|
|
7 |
|
.178 |
|
4.52 |
9 |
|
|
.187 |
3/16 |
4.762 |
|
|
|
.192 |
|
4.88 |
10 |
6 |
|
.196 |
|
5.000 |
|
|
|
.203 |
13/64 |
5.159 |
|
|
|
.212 |
|
|
|
5 |
|
.218 |
7/32 |
5.556 |
|
|
|
.220 |
|
5.59 |
12 |
|
|
.232 |
|
|
|
4 |
|
.234 |
15/64 |
5.953 |
|
|
|
.236 |
|
6.000 |
|
|
|
.248 |
|
6.30 |
14 |
|
|
.250 |
1/4 |
6.350 |
|
|
|
.252 |
|
|
|
3 |
|
.265 |
17/64 |
6.746 |
|
|
|
.275 |
|
7.000 |
|
|
|
.276 |
|
7.01 |
16 |
2 |
|
.281 |
9/32 |
7.143 |
|
|
|
.296 |
19/64 |
7.540 |
|
|
|
.300 |
|
|
|
1 |
|
.304 |
|
7.72 |
18 |
|
|
|
Inches
Decimals
|
Inches
Fractions |
mm |
Wood
Screw
Gauge |
Imperial
Standard
Wire
Gauge |
| .312 |
5/16 |
7.937 |
|
|
| .315 |
|
8.000 |
|
|
| .324 |
|
|
|
0 |
| .328 |
21/64 |
8.334 |
|
|
| .332 |
|
8.43 |
20 |
|
|
.343 |
11/32 |
8.731 |
|
|
|
.348 |
|
|
|
2/0 |
|
.354 |
|
9.000 |
|
|
|
.359 |
23/64 |
9.128 |
|
|
|
.372 |
|
|
|
3/0 |
|
.375 |
3/8 |
9.525 |
|
|
|
.390 |
25/64 |
9.921 |
|
|
|
.393 |
|
10.000 |
|
|
|
.400 |
|
|
|
4/0 |
|
.406 |
13/32 |
10.318 |
|
|
|
.421 |
27/64 |
10.715 |
|
|
|
.432 |
|
|
|
5/0 |
|
.433 |
|
11.000 |
|
|
|
.437 |
7/16 |
11.112 |
|
|
|
.453 |
29/64 |
11.509 |
|
|
|
.464 |
|
|
|
6/0 |
| .468 |
15/32 |
11.906 |
|
|
|
.472 |
|
12.000 |
|
|
|
.484 |
31/64 |
12.303 |
|
|
|
.511 |
|
13.00 |
|
|
|
.515 |
33/64 |
13.09 |
|
|
|
.531 |
17/32 |
13.49 |
|
|
|
.546 |
35/64 |
13.89 |
|
|
|
.551 |
|
14.00 |
|
|
|
.562 |
9/16 |
14.28 |
|
|
| .578 |
37/64 |
14.68 |
|
|
|
.590 |
|
15.00 |
|
|
|
.593 |
19/32 |
15.08 |
|
|
|
.609 |
39/64 |
15.47 |
|
|
|
.625 |
5/8 |
15.87 |
|
|
|
.629 |
|
16.00 |
|
|
|
.640 |
41/64 |
16.27 |
|
|
|
.656 |
21/32 |
16.66 |
|
|
|
.669 |
|
17.00 |
|
|
|
.671 |
43/64 |
17.06 |
|
|
|
.687 |
11/16 |
17.46 |
|
|
|
.703 |
45/64 |
17.85 |
|
|
|
.708 |
|
18.00 |
|
|
|
.718 |
23/32 |
18.25 |
|
|
|
.734 |
47/64 |
18.65 |
|
|
|
.748 |
|
19.00 |
|
|
|
.750 |
3/4 |
19.05 |
|
|
|
.765 |
49/64 |
19.44 |
|
|
|
.781 |
25/32 |
19.84 |
|
|
|
.787 |
|
20.00 |
|
|
|
.796 |
51/64 |
20.24 |
|
|
|
.812 |
13/16 |
20.63 |
|
|
|
.826 |
|
21.00 |
|
|
|
.828 |
53/64 |
21.03 |
|
|
|
.843 |
27/32 |
21.43 |
|
|
|
.859 |
55/64 |
21.82 |
|
|
|
.866 |
|
22.00 |
|
|
|
.875 |
7/8 |
22.22 |
|
|
|
.890 |
57/64 |
22.62 |
|
|
|
.905 |
|
23.00 |
|
|
|
.906 |
29/32 |
23.01 |
|
|
|
.921 |
59/64 |
23.41 |
|
|
|
.937 |
15/16 |
23.81 |
|
|
|
.944 |
|
24.00 |
|
|
|
.953 |
61/64 |
24.20 |
|
|
|
.968 |
31/32 |
24.60 |
|
|
|
.984 |
63/64 |
25.00 |
|
|
|
1.000 |
1 |
25.40 |
|
|
|
|
|
