Sheet Metal Gauge Tolerances Chart

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Sheet Metal Gauge Tolerances Chart

Sheet Metal & Wire Gauge Sizes Data Chart
Tolerances, Engineering Design & Limits & Fits

Sheet Metal Guage Tolerances

During the rolling process the rollers bow slightly, which results in the sheets being thinner on the edges. The tolerances in the table and attachments reflect current manufacturing practices and commercial standards and are not representative of the Manufacturer's Standard Gauge, which has no inherent tolerances.

Steel Sheet Metal Tolerances Table Chart
Gauge	Nominal in. (mm)	Max in. (mm)	Min in. (mm)
7	0.1793	0.1883 (4.78)	0.1703 ( 4.32)
8	0.1644	0.1734( 44.04)	0.1554( 3.95)
9	0.1495	0.1585(4.03 )	0.1405(3.56 )
10	0.1345 (3.42)	0.1405 (3.57)	0.1285 (3.26)
11	0.1196 (3.04)	0.1256 (3.19)	0.1136 (2.89)
12	0.1046 (2.66)	0.1106 (2.81)	0.0986 (2.50)
14	0.0747 (1.90)	0.0797 (2.02)	0.0697 (1.77)
16	0.0598 (1.52)	0.0648 (1.65)	0.0548 (1.39)
18	0.0478 (1.21)	0.0518 (1.32)	0.0438 (1.11)
20	0.0359 (0.91)	0.0389 (0.99)	0.0329 (0.84)
22	0.0299 (0.76)	0.0329 (0.84)	0.0269 (0.68)
24	0.0239 (0.61)	0.0269 (0.68)	0.0209 (0.53)
26	0.0179 (0.45)	0.0199 (0.51)	0.0159 (0.40)
28	0.0149 (0.38)	0.0169 (0.43)	0.0129 (0.33)

Aluminum Sheet Metal Tolerances Table Chart
Thickness in. (mm)	Sheet Width
Thickness in. (mm)	36 (914.4) in. (mm)	48 (1,219) in. (mm)
0.018–0.028 (0.46–0.71)	0.002 (0.051)	0.0025 (0.064)
0.029–0.036 (0.74–0.91)	0.002 (0.051)	0.0025 (0.064)
0.037–0.045 (0.94–1.14)	0.0025 (0.064)	0.003 (0.076)
0.046–0.068 (1.2–1.7)	0.003 (0.076)	0.004 (0.10)
0.069–0.076 (1.8–1.9)	0.003 (0.076)	0.004 (0.10)
0.077–0.096 (2.0–2.4)	0.0035 (0.089)	0.004 (0.10)
0.097–0.108 (2.5–2.7)	0.004 (0.10)	0.005 (0.13)
0.109–0.125 (2.8–3.2)	0.0045 (0.11)	0.005 (0.13)
0.126–0.140 (3.2–3.6)	0.0045 (0.11)	0.005 (0.13)
0.141–0.172 (3.6–4.4)	0.006 (0.15)	0.008 (0.20)
0.173–0.203 (4.4–5.2)	0.007 (0.18)	0.010 (0.25)
0.204–0.249 (5.2–6.3)	0.009 (0.23)	0.011 (0.28)

Stainless Steel Sheet Metal Tolerances Table Chart
Thickness in. (mm)	Sheet Width
Thickness in. (mm)	36 (914.4) in. (mm	48 (1,219) in. (mm)
0.017–0.030 (0.43–0.76)	0.0015 (0.038)	0.002 (0.051)
0.031–0.041 (0.79–1.04)	0.002 (0.051)	0.003 (0.076)
0.042–0.059 (1.1–1.5)	0.003 (0.076)	0.004 (0.10)
0.060–0.073 (1.5–1.9)	0.003 (0.076)	0.0045 (0.11)
0.074–0.084 (1.9–2.1)	0.004 (0.10)	0.0055 (0.14)
0.085–0.099 (2.2–2.5)	0.004 (0.10)	0.006 (0.15)
0.100–0.115 (2.5–2.9)	0.005 (0.13)	0.007 (0.18)
0.116–0.131 (2.9–3.3)	0.005 (0.13)	0.0075 (0.19)
0.132–0.146 (3.4–3.7)	0.006 (0.15)	0.009 (0.23)
0.147–0.187 (3.7–4.7)	0.007 (0.18)	0.0105 (0.2

Gauge.	Nominal in.	Max in.	Min. in.
Galvanized Steel Sheet Metal Table Chart
10	.1382 (3.51)	.1472	.1292
11	.1233 (3.13)	.1323	.1143
12	.1084 (2.75)	.1174	.0994
13	.0934 (2.37)	.1014	.0854
14	.0785	.0865	.0705
15	.0710	.0770	.0650
16	.0635	.0695	.0575
17	.0575	.0625	.0525
18	.0516	.0566	.0466
19	.0456	.0506	.0406
20	.0396	.0436	.0356
21	.0366	.0406	.0326
22	.0336	.0376	.0296
23	.0306	.0346	.0266
24	.0276	.0316	.0236
25	.0247	.0287	.0207
26	.0217	.0247	.0187
27	.0202	.0232	.0172
28	.0187	.0217	.0157
29	.0172	.0202	.0142
30	.0157	.0187	.0127

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