ALUMINUM SHEET THICKNESS TOLERANCES 1100 3003 5052 6061 2024 7075 1100 3003 ... (Inches +/-) By alloy group and width Nominal Thickness 36" 48" 60" ... The Brown & Sharpe (B&S) Sheet Metal Gauge (also known as the American Wire gauge, or AWG) is the American standard for ordering wire and sheet sizes. One side of this sheet metal gauge from General Tools is marked 0 to 36 in AWG sizes, while the decimal inch equivalents are marked on back.

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 Gauge (or gage) sizes are numbers that indicate the thickness of a piece of sheet metal, with a higher number referring to a thinner sheet. The equivalent thicknesses differ for each gauge size standard, which were developed based on the weight of the sheet for a given material. Sheet Metal Thickness (Gauge) Chart in Inches Gauge Mild Steel Aluminum Galvanized Steel Stainless Steel 3 0.2391 0.2294 0.2500 4 0.2242 0.2043 0.2344