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 0000000 Approximate thickness in fractions of an inch: 1/2 Approximate thickness in decimal parts of an inch: .5 Approximate thickness in millimeters: 12.7 Weight per square foot in ounces avoirdupois: 320 Weight per square foot in pounds avoirdupois: 20.00 Weight per square foot in kilograms: 9.072 Weight per square meter in kilograms: 97.65 Weight per square meter in pounds avoirdupois: 215.28 000000 Approximate thickness in fractions of an inch: 15/32 Approximate thickness in decimal parts of an inch: .46875 Approximate thickness in millimeters: 11.90625 Weight per square foot in ounces avoirdupois: 300 Weight per square foot in pounds avoirdupois: 18.75 Weight per square foot in kilograms: 8.505 Weight per square meter in kilograms: 91.55 Weight per square meter in pounds avoirdupois: 201.82 00000 Approximate thickness in fractions of an inch: 7/16 Approximate thickness in decimal parts of an inch: .4375 Approximate thickness in millimeters: 11.1125 Weight per square foot in ounces avoirdupois: 280 Weight per square foot in pounds avoirdupois: 17.50 Weight per square foot in kilograms: 7.983 Weight per square meter in kilograms: 85.44 Weight per square meter in pounds avoirdupois: 188.37 0000 Approximate thickness in fractions of an inch: 13/32 Approximate thickness in decimal parts of an inch: .40625 Approximate thickness in millimeters: 10.31875 Weight per square foot in ounces avoirdupois: 260 Weight per square foot in pounds avoirdupois: 16.25 Weight per square foot in kilograms: 7.371 Weight per square meter in kilograms: 79.33 Weight per square meter in pounds avoirdupois: 174.91 000 Approximate thickness in fractions of an inch: 3/8 Approximate thickness in decimal parts of an inch: .375 Approximate thickness in millimeters: 9.525 Weight per square foot in ounces avoirdupois: 240 Weight per square foot in pounds avoirdupois: 15 Weight per square foot in kilograms: 6.804 Weight per square meter in kilograms: 73.24 Weight per square meter in pounds avoirdupois: 161.46 00 Approximate thickness in fractions of an inch: 11/32 Approximate thickness in decimal parts of an inch: .34375 Approximate thickness in millimeters: 8.73125 Weight per square foot in ounces avoirdupois: 220 Weight per square foot in pounds avoirdupois: 13.75 Weight per square foot in kilograms: 6.237 Weight per square meter in kilograms: 67.13 Weight per square meter in pounds avoirdupois: 148.00 0 Approximate thickness in fractions of an inch: 5/16 Approximate thickness in decimal parts of an inch: .3125 Approximate thickness in millimeters: 7.9375 Weight per square foot in ounces avoirdupois: 200 Weight per square foot in pounds avoirdupois: 12.50 Weight per square foot in kilograms: 5.67 Weight per square meter in kilograms: 61.03 Weight per square meter in pounds avoirdupois: 134.55 1 Approximate thickness in fractions of an inch: 9/32 Approximate thickness in decimal parts of an inch: .28125 Approximate thickness in millimeters: 7.14375 Weight per square foot in ounces avoirdupois: 180 Weight per square foot in pounds avoirdupois: 11.25 Weight per square foot in kilograms: 5.103 Weight per square meter in kilograms: 54.93 Weight per square meter in pounds avoirdupois: 121.09 2 Approximate thickness in fractions of an inch: 17/64 Approximate thickness in decimal parts of an inch: .265625 Approximate thickness in millimeters: 6.746875 Weight per square foot in ounces avoirdupois: 170 Weight per square foot in pounds avoirdupois: 10.625 Weight per square foot in kilograms: 4.819 Weight per square meter in kilograms: 51.88 Weight per square meter in pounds avoirdupois: 114.37 3 Approximate thickness in fractions of an inch: 1/4 Approximate thickness in decimal parts of an inch: .25 Approximate thickness in millimeters: 6.35 Weight per square foot in ounces avoirdupois: 160 Weight per square foot in pounds avoirdupois: 10 Weight per square foot in kilograms: 4.536 Weight per square meter in kilograms: 48.82 Weight per square meter in pounds avoirdupois: 107.64 4 Approximate thickness in fractions of an inch: 15/64 Approximate thickness indecimal parts of an inch: .234375 Approximate thickness in millimeters: 5.953125 Weight per square foot in ounces avoirdupois: 150 Weight per square foot in pounds avoirdupois: 9.375 Weight per square foot in kilograms: 4.252 Weight per square meter in kilograms: 45.77 Weight per square meter in pounds avoirdupois: 100.91 5 Approximate thickness in fractions of an inch: 7/32 Approximate thickness indecimal parts of an inch: .21875 Approximate thickness in millimeters: 5.55625 Weight per square foot in ounces avoirdupois: 140 Weight per square foot in pounds avoirdupois: 8.75 Weight per square foot in kilograms: 3.969 Weight per square meter in kilograms: 42.72 Weight per square meter in pounds avoirdupois: 94.18 6 Approximate thickness in fractions of an inch: 13/64 Approximate thickness indecimal parts of an inch: .203125 Approximate thickness in millimeters: 5.159375 Weight per square foot in ounces avoirdupois: 130 Weight per square foot in pounds avoirdupois: 8.125 Weight per square foot in kilograms: 3.685 Weight per square meter in kilograms: 39.67 Weight per square meter in pounds avoirdupois: 87.45 7 Approximate thickness in fractions of an inch: 3/16 Approximate thickness indecimal parts of an inch: .1875 Approximate thickness in millimeters: 4.7625 Weight per square foot in ounces avoirdupois: 120 Weight per square foot in pounds avoirdupois: 7.5 Weight per square foot in kilograms: 3.402 Weight per square meter in kilograms: 36.62 Weight per square meter in pounds avoirdupois: 80.72 8 Approximate thickness in fractions of an inch: 11/64 Approximate thickness indecimal parts of an inch: .171875 Approximate thickness in millimeters: 4.365625 Weight per square foot in ounces avoirdupois: 110 Weight per square foot in pounds avoirdupois: 6.875 Weight per square foot in kilograms: 3.118 Weight per square meter in kilograms: 33.57 Weight per square meter in pounds avoirdupois: 74.00 9 Approximate thickness in fractions of an inch: 5/32 Approximate thickness indecimal parts of an inch: .15625 Approximate thickness in millimeters: 3.96875 Weight per square foot in ounces avoirdupois: 100 Weight per square foot in pounds avoirdupois: 6.25 Weight per square foot in kilograms: 2.835 Weight per square meter in kilograms: 30.52 Weight per square meter in pounds avoirdupois: 67.27 10 Approximate thickness in fractions of an inch: 9/64 Approximate thickness indecimal parts of an inch: .140625 Approximate thickness in millimeters: 3.571875 Weight per square foot in ounces avoirdupois: 90 Weight per square foot in pounds avoirdupois: 5.625 Weight per square foot in kilograms: 2.552 Weight per square meter in kilograms: 27.46 Weight per square meter in pounds avoirdupois: 60.55 11 Approximate thickness in fractions of an inch: 1/8 Approximate thickness indecimal parts of an inch: .125 Approximate thickness in millimeters: 3.175 Weight per square foot in ounces avoirdupois: 80 Weight per square foot in pounds avoirdupois: 5 Weight per square foot in kilograms: 2.268 Weight per square meter in kilograms: 24.41 Weight per square meter in pounds avoirdupois: 53.82 12 Approximate thickness in fractions of an inch: 7/64 Approximate thickness indecimal parts of an inch: .109375 Approximate thickness in millimeters: 2.778125 Weight per square foot in ounces avoirdupois: 70 Weight per square foot in pounds avoirdupois: 4.375 Weight per square foot in kilograms: 1.984 Weight per square meter in kilograms: 21.36 Weight per square meter in pounds avoirdupois: 47.09 13 Approximate thickness in fractions of an inch: 3/32 Approximate thickness indecimal parts of an inch: .09375 Approximate thickness in millimeters: 2.38125 Weight per square foot in ounces avoirdupois: 60 Weight per square foot in pounds avoirdupois: 3.75 Weight per square foot in kilograms: 1.701 Weight per square meter in kilograms: 18.31 Weight per square meter in pounds avoirdupois: 40.36 14 Approximate thickness in fractions of an inch: 5/64 Approximate thickness indecimal parts of an inch: .078125 Approximate thickness in millimeters: 1.984375 Weight per square foot in ounces avoirdupois: 50 Weight per square foot in pounds avoirdupois: 3.125 Weight per square foot in kilograms: 1.417 Weight per square meter in kilograms: 15.26 Weight per square meter in pounds avoirdupois: 33.64 15 Approximate thickness in fractions of an inch: 9/128 Approximate thickness indecimal parts of an inch: .0703125 Approximate thickness in millimeters: 1.7859375 Weight per square foot in ounces avoirdupois: 45 Weight per square foot in pounds avoirdupois: 2.8125 Weight per square foot in kilograms: 1.276 Weight per square meter in kilograms: 13.73 Weight per square meter in pounds avoirdupois: 30.27 16 Approximate thickness in fractions of an inch: 1/16 Approximate thickness indecimal parts of an inch: .0625 Approximate thickness in millimeters: 1.5875 Weight per square foot in ounces avoirdupois: 40 Weight per square foot in pounds avoirdupois: 2.5 Weight per square foot in kilograms: 1.134 Weight per square meter in kilograms: 12.21 Weight per square meter in pounds avoirdupois: 26.91 17 Approximate thickness in fractions of an inch: 9/160 Approximate thickness indecimal parts of an inch: .05625 Approximate thickness in millimeters: 1.42875 Weight per square foot in ounces avoirdupois: 36 Weight per square foot in pounds avoirdupois: 2.25 Weight per square foot in kilograms: 1.021 Weight per square meter in kilograms: 10.99 Weight per square meter in pounds avoirdupois: 24.22 18 Approximate thickness in fractions of an inch: 1/20 Approximate thickness indecimal parts of an inch: .05 Approximate thickness in millimeters: 1.27 Weight per square foot in ounces avoirdupois: 32 Weight per square foot in pounds avoirdupois: 2 Weight per square foot in kilograms: .9072 Weight per square meter in kilograms: 9.765 Weight per square meter in pounds avoirdupois: 21.53 19 Approximate thickness in fractions of an inch: 7/160 Approximate thickness indecimal parts of an inch: .04375 Approximate thickness in millimeters: 1.11125 Weight per square foot in ounces avoirdupois: 28 Weight per square foot in pounds avoirdupois: 1.75 Weight per square foot in kilograms: .7938 Weight per square meter in kilograms: 8.544 Weight per square meter in pounds avoirdupois: 18.84 20 Approximate thickness in fractions of an inch: 3/80 Approximate thickness indecimal parts of an inch: .0375 Approximate thickness in millimeters: .9525 Weight per square foot in ounces avoirdupois: 24 Weight per square foot in pounds avoirdupois: 1.50 Weight per square foot in kilograms: .6804 Weight per square meter in kilograms: 7.324 Weight per square meter in pounds avoirdupois: 16.15 21 Approximate thickness in fractions of an inch: 11/320 Approximate thickness indecimal parts of an inch: .034375 Approximate thickness in millimeters: .873125 Weight per square foot in ounces avoirdupois: 22 Weight per square foot in pounds avoirdupois: 1.375 Weight per square foot in kilograms: .6237 Weight per square meter in kilograms: 6.713 Weight per square meter in pounds avoirdupois: 14.80 22 Approximate thickness in fractions of an inch: 1/32 Approximate thickness indecimal parts of an inch: .03125 Approximate thickness in millimeters: .793750 Weight per square foot in ounces avoirdupois: 20 Weight per square foot in pounds avoirdupois: 1.25 Weight per square foot in kilograms: .567 Weight per square meter in kilograms: 6.103 Weight per square meter in pounds avoirdupois: 13.46 23 Approximate thickness in fractions of an inch: 9/320 Approximate thickness indecimal parts of an inch: .028125 Approximate thickness in millimeters: .714375 Weight per square foot in ounces avoirdupois: 18 Weight per square foot in pounds avoirdupois: 1.125 Weight per square foot in kilograms: .5103 Weight per square meter in kilograms: 5.493 Weight per square meter in pounds avoirdupois: 12.11 24 Approximate thickness in fractions of an inch: 1/40 Approximate thickness indecimal parts of an inch: .025 Approximate thickness in millimeters: .635 Weight per square foot in ounces avoirdupois: 16 Weight per square foot in pounds avoirdupois: 1 Weight per square foot in kilograms: .4536 Weight per square meter in kilograms: 4.882 Weight per square meter in pounds avoirdupois: 10.76 25 Approximate thickness in fractions of an inch: 7/320 Approximate thickness indecimal parts of an inch: .021875 Approximate thickness in millimeters: .555625 Weight per square foot in ounces avoirdupois: 14 Weight per square foot in pounds avoirdupois: .875 Weight per square foot in kilograms: .3969 Weight per square meter in kilograms: 4.272 Weight per square meter in pounds avoirdupois: 9.42 26 Approximate thickness in fractions of an inch: 3/160 Approximate thickness indecimal parts of an inch: .01875 Approximate thickness in millimeters: .47625 Weight per square foot in ounces avoirdupois: 12 Weight per square foot in pounds avoirdupois: .75 Weight per square foot in kilograms: .3402 Weight per square meter in kilograms: 3.662 Weight per square meter in pounds avoirdupois: 8.07 27 Approximate thickness in fractions of an inch: 11/640 Approximate thickness indecimal parts of an inch: .0171875 Approximate thickness in millimeters: .4365625 Weight per square foot in ounces avoirdupois: 11 Weight per square foot in pounds avoirdupois: .6875 Weight per square foot in kilograms: .3119 Weight per square meter in kilograms: 3.357 Weight per square meter in pounds avoirdupois: 7.40 28 Approximate thickness in fractions of an inch: 1/64 Approximate thickness indecimal parts of an inch: .015625 Approximate thickness in millimeters: .396875 Weight per square foot in ounces avoirdupois: 10 Weight per square foot in pounds avoirdupois: .625 Weight per square foot in kilograms: .2835 Weight per square meter in kilograms: 3.052 Weight per square meter in pounds avoirdupois: 6.73 29 Approximate thickness in fractions of an inch: 9/640 Approximate thickness indecimal parts of an inch: .0140625 Approximate thickness in millimeters: .3571875 Weight per square foot in ounces avoirdupois: 9 Weight per square foot in pounds avoirdupois: .5625 Weight per square foot in kilograms: .2551 Weight per square meter in kilograms: 2.746 Weight per square meter in pounds avoirdupois: 6.05 30 Approximate thickness in fractions of an inch: 1/80 Approximate thickness indecimal parts of an inch: .0125 Approximate thickness in millimeters: .3175 Weight per square foot in ounces avoirdupois: 8 Weight per square foot in pounds avoirdupois: .5 Weight per square foot in kilograms: .2268 Weight per square meter in kilograms: 2.441 Weight per square meter in pounds avoirdupois: 5.38 31 Approximate thickness in fractions of an inch: 7/640 Approximate thickness indecimal parts of an inch: .0109375 Approximate thickness in millimeters: .2778125 Weight per square foot in ounces avoirdupois: 7 Weight per square foot in pounds avoirdupois: .4375 Weight per square foot in kilograms: .1984 Weight per square meter in kilograms: 2.136 Weight per square meter in pounds avoirdupois: 4.71 32 Approximate thickness in fractions of an inch: 13/1280 Approximate thickness in decimal parts of an inch: .01015625 Approximate thickness in millimeters: .25796875 Weight per square foot in ounces avoirdupois: 6 1/2 Weight per square foot in pounds avoirdupois: .40625 Weight per square foot in kilograms: .1843 Weight per square meter in kilograms: 1.983 Weight per square meter in pounds avoirdupois: 4.37 33 Approximate thickness in fractions of an inch: 3/320 Approximate thickness indecimal parts of an inch: .009375 Approximate thickness in millimeters: .238125 Weight per square foot in ounces avoirdupois: 6 Weight per square foot in pounds avoirdupois: .375 Weight per square foot in kilograms: .1701 Weight per square meter in kilograms: 1.831 Weight per square meter in pounds avoirdupois: 4.04 34 Approximate thickness in fractions of an inch: 11/1280 Approximate thickness in decimal parts of an inch: .00859375 Approximate thickness in millimeters: .21828125 Weight per square foot in ounces avoirdupois: 5 1/2 Weight per square foot in pounds avoirdupois: .34375 Weight per square foot in kilograms: .1559 Weight per square meter in kilograms: 1.678 Weight per square meter in pounds avoirdupois: 3.70 35 Approximate thickness in fractions of an inch: 5/640 Approximate thickness indecimal parts of an inch: .0078125 Approximate thickness in millimeters: .1984375 Weight per square foot in ounces avoirdupois: 5 Weight per square foot in pounds avoirdupois: .3125 Weight per square foot in kilograms: .1417 Weight per square meter in kilograms: 1.526 Weight per square meter in pounds avoirdupois: 3.36 36 Approximate thickness in fractions of an inch: 9/1280 Approximate thickness indecimal parts of an inch: .00703125 Approximate thickness in millimeters: .17859375 Weight per square foot in ounces avoirdupois: 4 1/2 Weight per square foot in pounds avoirdupois: .28125 Weight per square foot in kilograms: .1276 Weight per square meter in kilograms: 1.373 Weight per square meter in pounds avoirdupois: 3.03 37 Approximate thickness in fractions of an inch: 17/2560 Approximate thickness in decimal parts of an inch: .006640625 Approximate thickness in millimeters: .168671875 Weight per square foot in ounces avoirdupois: 4 1/4 Weight per square foot in pounds avoirdupois: .265625 Weight per square foot in kilograms: .1205 Weight per square meter in kilograms: 1.297 Weight per square meter in pounds avoirdupois: 2.87 38 Approximate thickness in fractions of an inch: 1/160 Approximate thickness indecimal parts of an inch: .00625 Approximate thickness in millimeters: .15875 Weight per square foot in ounces avoirdupois: 4 Weight per square foot in pounds avoirdupois: .25 Weight per square foot in kilograms: .1134 Weight per square meter in kilograms: 1.221 Weight per square meter in pounds avoirdupois: 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.
A service of the Legal Information Institute.