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
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
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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