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 Steel Thickness Conversion Table  
 
Steel Thickness Conversion Table (Gauge - Inch - MM)
 
Gauge No. B.W.G U.S.G   Gauge No. B.W.G U.S.G
inch mm inch mm inch mm inch mm
6 .203 5.156 .2031 5.16   21 .032 .813 .0344 .873
7 .180 4.572 .1875 4.76   22 .028 .711 .0313 .794
8 .165 4.191 .1719 4.37   23 .025 .635 .0218 .714
9 .148 3.759 .1563 3.97   24 .022 .559 .0250 .635
10 .134 3.404 .1406 3.57   25 .020 .508 .0219 .556
11 .120 3.048 .1250 3.18   26 .018 .457 .0188 .478
12 .109 2.769 .1094 2.78   27 .016 .406 .0172 .437
13 .095 2.413 .0938 2.38   28 .014 .356 .0156 .396
14 .083 2.108 .0781 1.98   29 .013 .330 .0141 .358
15 .072 1.829 .0703 1.79   30 .012 .305 .0125 .318
16 .065 1.651 .0625 1.59   31 .010 .254 .0109 .277
17 .058 1.473 .0563 1.43   32 .009 .229 .0102 .259
18 .049 1.245 .0500 1.27   33 .008 .203 .0094 .239
19 .042 1.067 .0438 1.11   34 .007 .178 .0086 .218
20 .035 .889 .0375 .953   35 .005 .127 .0078 .198