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Wire Gauge
The 18 Gauge Pin or nail is over 78% (0.0403"/0.0226") larger than the 23 gauge pin. This explains why the 23 gauge pin penetrates hard woods without splitting the wood as the 18 gauge is likely to do.
Wire Gauge / Gage Conversion Chart
S.W.G.
|
Wire Number
|
A.W.G. or B&S
|
A.W.G. Metric
|
(Inches)
|
(Gauge)
|
(Inches)
|
(MM)
|
0.500
|
0000000 (7/0)
|
.......................
|
............
|
0.464
|
000000 (6/0)
|
0.580000
|
............
|
0.432
|
00000 (5/0)
|
0.516500
|
............
|
0.400
|
0000 (4/0)
|
0.460000
|
11,684
|
0.372
|
000 (3/0)
|
0.409642
|
10,404
|
0.348
|
00 (2/0)
|
0.364796
|
9,266
|
0.324
|
0 (1/0)
|
0.324861
|
8,252
|
0.300
|
1
|
0.289297
|
7,348
|
0.276
|
2
|
0.257627
|
6,543
|
0.252
|
3
|
0.229423
|
5,827
|
0.232
|
4
|
0.2043
|
5,189
|
0.2120
|
5
|
0.1819
|
4,621
|
0.1920
|
6
|
0.1620
|
4,115
|
0.1760
|
7
|
0.1443
|
3,665
|
0.1600
|
8
|
0.1285
|
3,264
|
0.1440
|
9
|
0.1144
|
2,906
|
0.1280
|
10
|
0.1019
|
2,588
|
0.1160
|
11
|
0.0907
|
2,304
|
0.1040
|
12
|
0.0808
|
2,052
|
S.W.G.
|
Wire Number
|
A.W.G. or B&S
|
A.W.G. Metric
|
0.0920
|
13
|
0.0720
|
1,829
|
0.0800
|
14
|
0.0641
|
1,628
|
0.0720
|
15
|
0.0571
|
1,450
|
0.0640
|
16
|
0.0508
|
1,291
|
0.0560
|
17
|
0.0453
|
1,150
|
0.0480
|
18
|
0.0403
|
1,024
|
0.0400
|
19
|
0.0359
|
0,9119
|
0.0360
|
20
|
0.0320
|
0,8128
|
0.0320
|
21
|
0.0285
|
0,7239
|
0.0280
|
22
|
0.0253
|
0,6426
|
0.0240
|
23
|
0.0226
|
0,5740
|
0.0220
|
24
|
0.0201
|
0,5106
|
0.0200
|
25
|
0.0179
|
0,4547
|
0.0180
|
26
|
0.0159
|
0,4038
|
0.0164
|
27
|
0.0142
|
0,3606
|
0.0148
|
28
|
0.0126
|
0,3200
|
0.0136
|
29
|
0.0113
|
0,2870
|
0.0124
|
30
|
0.0100
|
0,2540
|
0.0116
|
31
|
0.0089
|
0,2261
|
0.0108
|
32
|
0.0080
|
0,2032
|
0.0100
|
33
|
0.0071
|
0,1803
|
S.W.G.
|
Wire Number
|
A.W.G. or B&S
|
A.W.G. Metric
|
0.0092
|
34
|
0.0063
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0,1601
|
0.0084
|
35
|
0.0056
|
0,1422
|
0.0076
|
36
|
0.0050
|
0,1270
|
0.0068
|
37
|
0.0045
|
0,1143
|
0.0060
|
38
|
0.0040
|
0,1016
|
0.0052
|
39
|
0.0035
|
0,0889
|
0.0048
|
40
|
0.0031
|
0,0787
|
0.0044
|
41
|
0.0028
|
0,0711
|
0.0040
|
42
|
0.0025
|
0,0635
|
0.0036
|
43
|
0.0022
|
0,0559
|
0.0032
|
44
|
0.0020
|
0,0508
|
0.0028
|
45
|
0.0018
|
0,0457
|
0.0024
|
46
|
0.0016
|
0,0406
|
0.0020
|
47
|
0.0014
|
0,0350
|
0.0016
|
48
|
0.0012
|
0.0305
|
0.0012
|
49
|
0.0011
|
0,0279
|
0.0010
|
50
|
0.0010
|
0,0254
|
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51
|
0.00088
|
0,0224
|
 |
52
|
0.00078
|
0,0198
|
 |
53
|
0.00070
|
0,0178
|
 |
54
|
0.00062
|
0,0158
|
 |
55
|
0.00055
|
0,0140
|
 |
56
|
0.00049
|
0,0124
|
Wire Gauges / Gages Arranged In Columns As Follows:
AWG = American Wire Gauge
B&S = Brown & Sharpe
SWG = Imperial Standard Wire Gauge - (British legal standard)
Wire Guage /Gage Comment:
Values are stated in approximate decimals of an inch excluding the metric numbers. As a number of gauges are in use for various shapes and metals, it is advisable to state the thickness in thousands when specifying in gauge number. Metric wire gauge is 10 times the diameter in millimeters.
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