GA 是 GAUGE 的意思.美国标准中，GA是代表厚度的意思。。 北美标准GA是北美的一种关于直径的长度计量单位！属于Browne&Sharpe计量系统，最初是用在医学和珠宝领域的！数字越大直径越小。后来推广了，也可以表示厚度。.有色金属板和钢铁板同是某某GA的时候，厚度实际上不一样,同是某某GA的板材和管材数值也不一样。
材料厚度標準比較
美制 10GA 11GA 12GA 14GA 16GA 18GA 20GA 22GA 25GA 29GA
公制 3.5 3 2.6 2 1.5 1.2 1 0.8 0.6 0.355
英制 0.137 0.12 0.08 0.075 0.06 0.048 0.036 0.03 0.023 0.014
Gauge 分数英寸小数英寸公制（毫米）
1/64" 0.0156" 0.397 mm
26ga 0.0159" 0.404 mm
25ga 0.0179" 0.4547 mm
24ga 0.0201" 0.511 mm
23ga 0.0226" 0.574 mm
22ga 0.0253" 0.643 mm
21ga 0.02846" 0.723 mm
2/64" (1/32") 0.0313" 0.794 mm
粉尘清扫管理制度20ga 0.0320" 0.812 mm
19ga 0.0359" 0.912 mm
0.039" 1.0 mm
18ga 0.040" 1.02 mm
17ga 0.045" 1.14 mm
3/64" 0.047" 1.19 mm
16ga 0.051" 1.3 mm
15ga 0.057" 1.45 mm
4/64" (1/16") 0.0625" 1.59 mm
14ga 0.064" 1.6 mm
13ga 0.072" 1.8 mm
5/64" 0.078" 1.98 mm
0.079" 2.0 mm
12ga 0.081" 2.06 mm
11ga 0.091" 2.3 mm
好句好段6/64" (3/32") 0.094" 2.38 mm
10ga 0.102" 2.6 mm
7/64" 0.109" 2.78 mm
9ga 0.114" 2.9 mm
0.118" 3.0 mm幼儿园操场
8/64" (1/8") 0.125" 3.18 mm
2008北京奥运会口号8ga 0.12849" 3.26 mm
9/64" 0.141" 3.57 mm
山药炖鸽
7ga 0.144" 3.66 mm
10/64" (5/32") 0.156" 3.97 mm
0.157" 4.0 mm
6ga 0.162" 4.1 mm
11/64" 0.172" 4.37 mm
5ga 0.182" 4.6 mm
12/64" (3/16") 0.1875" 4.76 mm
0.197" 5.0 mm
13/64" 0.203" 5.16 mm
4ga 0.204" 5.2 mm
14/64" (7/32") 0.219" 5.56 mm
3ga 0.229" 5.8 mm
15/64" 0.234" 5.95 mm
0.236" 6.0 mm
16/64" (1/4") 0.250" 6.35 mm
2ga 0.2576" 6.54 mm
17/64" 0.266" 6.747 mm
0.276" 7.0 mm
18/64" (9/32") 0.281" 7.14 mm
1ga 0.289" 7.3 mm
19/64" 0.297" 7.54 mm
20/64" (5/16") 0.3125" 7.94 mm
0.315" 8.0 mm
0ga 0.3249" 8.2525 mm
21/64" 0.328" 8.33 mm
22/64" (11/32") 0.344" 8.73 mm
0.354" 9.0 mm
23/64" 0.359" 9.13 mm
00ga 0.3648" 9.266 mm
24/64" (3/8") 0.375" 9.53 mm
25/64" 0.391" 9.92 mm
0.394" 10.0 mm
26/64" (13/32") 0.406" 10.32 mm
000ga 0.4096" 10.4 mm
27/64" 0.422" 10.72 mm
0.433" 11.0 mm
28/64" (7/16") 0.4375" 11.11 mm
29/64" 0.453" 11.51 mm
0000ga 0.460" 11.68 mm
30/64" (15/32") 0.469" 11.91 mm
0.472" 12.0 mm
31/64" 0.484" 12.30 mm
1/2" (32/64") 0.500" 12.70 mm
0.512" 13.0 mm
00000ga 0.517" 13.12 mm
0.551" 14.0 mm
9/16" (36/64") 0.5625" 14.28 mm
000000ga 0.580" 14.73 mm
0.591" 15.0 mm
5/8" (40/64") 0.625" 15.87 mm
0.630" 16.0 mm
0.669" 17.0 mm
11/16" (44/64") 0.6875" 17.46 mm
0.709" 18.0 mm
0.748" 19.0 mm
3/4" (48/64") 0.750" 19.05 mm
0.787" 20.0 mm
13/16" (52/64") 0.8125" 20.64mm
0.827" 21.0 mm
0.866" 22.0 mm
7/8" (56/64") 0.875" 22.22 mm
0.906" 23.0 mm
15/16" (60/64") 0.9375" 23.81 mm
0.945" 24.0 mm
0.984" 25.0 mm
1" (64/64") 1.000" 25.40 mm
1.024" 26.0 mm
1-1/16" 1.0625" 27.0 mm
1.102" 28.0 mm
1-1/8" 1.125" 28.6 mm
1.142" 29.0 mm
1.181" 30.0 mm
多属性决策1-3/16" 1.1875" 30.16 mm
1-1/4" 1.250" 31.75 mm
1-5/16" 1.3125" 33.3 mm
1-3/8" 1.375" 34.9 mm
1-7/16" 1.4375" 36.5 mm
1-1/2" 1.500" 38.1 mm
1-9/16" 1.5625" 39.7 mm
动物照片大全图片1-5/8" 1.625" 41.3 mm
1-11/16" 1.6875" 42.86 mm
1-3/4" 1.750" 44.45 mm
1-13/16" 1.8125" 46.04 mm
1-7/8" 1.875" 47.6 mm
1-15/16" 1.9375" 49.2 mm
2" 2.000" 50.8 mm
