Sheet Metal Gauge Sizes

Comprehensive Sheet Metal Gauge Size Chart​

Reference this chart for part sizing in all our materials.

Before there was a way to use physical measurements, gauge size charts were used to describe the thickness of sheet metal materials. However, gauge thickness is dependent on the density of the material, which means that different materials use different gauge charts.

At SendCutSend we provide all of our material options in imperial and metric systems so there’s no confusion on what size material you’re ordering. However, it’s still valuable to understand the different gauge sizes.

Check out the video below to learn more about gauge thickness and reference the following gauge charts to see what materials we have in stock.

Play Video

Comprehensive Gauge Size Charts

Aluminum Gauge Chart

Gauge
Number
Inches (approx)MM (approx)In stock at SendCutSend
7.14433.665 
8.12853.2645052 Aluminum
6061 Aluminum
7075 Aluminum
9.11442.906 
10.10192.5885052 Aluminum
11.090742.3055052 Aluminum
12.080812.0535052 Aluminum
6061 Aluminum
14.064081.6285052 Aluminum
6061 Aluminum
16.050821.291 
18.040301.0245052 Aluminum
6061 Aluminum
20.03196.812 
22.02535.644 
24.02010.511 
26.01594.405 

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We proudly use hardware by PEM

Flush stud, M8 x 1.25, .472" Zinc plus Clear Chromate

Aluminum: 5052, 6061, 7075 Steel: Mild

SKUFH-M8-12
Thread SizeM8 x 1.25
Hole size in sheet (+0.003/-.0.000).315″
Minimum sheet thickness0.094″
Maximum sheet thickness.347″
Fastener materialSteel
Minimum distance hole C/L to edge0.378″
Minimum distance between two of the same hardware.567″
Recommended panel materialSteel/Aluminum
Coating typeZinc
Length.472″
Aluminum material ranges (5052, 6061, 7075)0.100″-0.250″
Steel material ranges (CRS, HRPO, HR)0.104″-0.250″

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We proudly use hardware by PEM

Flush Standoff, 4-40, .250" Zinc plus Clear Chromate

Aluminum: 5052, 6061, 7075 Steel: Mild, G30

SKUSO-440-8
Thread Size4-40 x .250″
Hole size in sheet (+0.003/-.0.000).168″
Minimum sheet thickness0.040″
Maximum sheet thickness.125″
Fastener materialSteel
Minimum distance hole C/L to edge0.230″
When determining the distance between two or more fasteners, you can calculate the distance by the formula, C/L to edge + 1/2 the diameter of the second mounting hole..345″
Recommended panel materialSteel/Aluminum
Coating typeZinc
Length.250″
Aluminum material ranges (5052, 6061, 7075)0.040″-0.125″
Steel material ranges (CRS, HRPO, HR)0.048″-0.119″

We proudly use hardware by PEM

Flush Standoff, 4-40, .250" Passivated

Stainless Steel: 304, 316

SKUSO4-440-8
Thread Size440
Hole size in sheet (+0.003/-.0.000).166″
Minimum sheet thickness0.04″
Maximum sheet thickness.125″
Fastener material400 Stainless Steel
Minimum distance hole C/L to edge0.230″
When determining the distance between two or more fasteners, you can calculate the distance by the formula, C/L to edge + 1/2 the diameter of the second mounting hole. Example shown with x2 of the same hardware..313″
Recommended panel materialStainless Steel
Coating typePassivated
Length.250″
304 Stainless Steel material ranges0.048″-0.125″
316 Stainless Steel material ranges0.060″-0.125″