15 U.S.C. § 206 (COMMERCE AND TRADE)
§ 206. Standard gauge for sheet and plate iron and steel
For the purpose of securing uniformity the following is established as the only standard gauge for sheet and plate iron and steel in the United States of America, namely:
Number of gauge
Approximate thickness in fractions of an inch
Approximate thickness in decimal parts of an inch
Approximate thickness in millimeters
Weight per square foot in ounces avoirdupois
Weight per square foot in pounds avoirdupois
Weight per square foot in kilograms
Weight per square meter in kilograms
Weight per square meter in pounds
avoirdupois
0000000
1/2
.5
12.7
320
20.00
9.072
97.65
215.28
000000
15/32
.46875
11.90625
300
18.75
8.505
91.55
201.82
00000
7/16
.4375
11.1125
280
17.50
7.983
85.44
188.37
0000
13/32
.40625
10.31875
260
16.25
7.371
79.33
174.91
000
3/8
.375
9.525
240
15
6.804
73.24
161.46
00
11/32
.34375
8.73125
220
13.75
6.237
67.13
148.00
0
5/16
.3125
7.9375
200
12.50
5.67
61.03
134.55
1
9/32
.28125
7.14375
180
11.25
5.103
54.93
121.09
2
17/64
.265625
6.746875
170
10.625
4.819
51.88
114.37
3
1/4
.25
6.35
160
10
4.536
48.82
107.64
4
15/64
.234375
5.953125
150
9.375
4.252
45.77
100.91
5
7/32
.21875
5.55625
140
8.75
3.969
42.72
94.18
6
13/64
.203125
5.159375
130
8.125
3.685
39.67
87.45
7
3/16
.1875
4.7625
120
7.5
3.402
36.62
80.72
8
11/64
.171875
4.365625
110
6.875
3.118
33.57
74.00
9
5/32
.15625
3.96875
100
6.25
2.835
30.52
67.27
10
9/64
.140625
3.571875
90
5.625
2.552
27.46
60.55
11
1/8
.125
3.175
80
5
2.268
24.41
53.82
12
7/64
.109375
2.778125
70
4.375
1.984
21.36
47.09
13
3/32
.09375
2.38125
60
3.75
1.701
18.31
40.36
14
5/64
.078125
1.984375
50
3.125
1.417
15.26
33.64
15
9/128
.0703125
1.7859375
45
2.8125
1.276
13.73
30.27
16
1/16
.0625
1.5875
40
2.5
1.134
12.21
26.91
17
9/160
.05625
1.42875
36
2.25
1.021
10.99
24.22
18
1/20
.05
1.27
32
2
.9072
9.765
21.53
19
7/160
.04375
1.11125
28
1.75
.7938
8.544
18.84
20
3/80
.0375
.9525
24
1.50
.6804
7.324
16.15
21
11/320
.034375
.873125
22
1.375
.6237
6.713
14.80
22
1/32
.03125
.793750
20
1.25
.567
6.103
13.46
23
9/320
.028125
.714375
18
1.125
.5103
5.493
12.11
24
1/40
.025
.635
16
1
.4536
4.882
10.76
25
7/320
.021875
.555625
14
.875
.3969
4.272
9.42
26
3/160
.01875
.47625
12
.75
.3402
3.662
8.07
27
11/640
.0171875
.4365625
11
.6875
.3119
3.357
7.40
28
1/64
.015625
.396875
10
.625
.2835
3.052
6.73
29
9/640
.0140625
.3571875
9
.5625
.2551
2.746
6.05
30
1/80
.0125
.3175
8
.5
.2268
2.441
5.38
31
7/640
.0109375
.2778125
7
.4375
.1984
2.136
4.71
32
13/1280
.01015625
.25796875
6½
.40625
.1843
1.983
4.37
33
3/320
.009375
.238125
6
.375
.1701
1.831
4.04
34
11/1280
.00859375
.21828125
5½
.34375
.1559
1.678
3.70
35
5/640
.0078125
.1984375
5
.3125
.1417
1.526
3.36
36
9/1280
.00703125
.17859375
4½
.28125
.1276
1.373
3.03
37
17/2560
.006640625
.168671875
4¼
.265625
.1205
1.297
2.87
38
1/160
.00625
.15875
4
.25
.1134
1.221
2.69
The same and no other shall be used in determining duties and taxes levied by the United States of America on sheet and plate iron and steel. But this subchapter shall not be construed to increase duties upon any articles which may be imported.
(Mar. 3, 1893, ch. 221, § 1, 27 Stat. 746.)
heading: References in Text
text: This subchapter, referred to in text, was in the original “this act”, meaning act Mar. 3, 1893, ch. 221, 27 Stat. 746, which is classified to sections 206 to 208 of this title.