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Ground Flat Stock - Steel Grades, Sizes, Manufacturers
This Manufacturers Table shows the steel grades, tolerances, and sizes of Ground Flat Stock (GFS) offered by the leading North American manufacturers. To use this table, find a steel grade in the left column. Read the tolerances and sizes offered by each manufacturer in the other columns of the same row. An empty cell indicates that the manufacturer does not offer the product.
| Steel Grade | Tolerance | Precision Marshall | DB&S Steel | Starrett | Precision Brand |
| O-1 | Regular (inch) |
Thickness: 1/64″-2.5″ Width: 1/8″-12″ Length: 18″-36″ |
Thickness: 1/64″-2″ Width: 1/8″-14″ Length: 18″-36″ |
Thickness: 1/64″-2″ Width: 1/8″-12″ Length: 18″-36″ |
Thickness: 1/16″-1″ Width: 1/8″-6″ Length: 18″ |
| Oversize (inch) |
Thickness: 1/8″-1″ Width: 1/8″-12″ Length: 18″-36″ |
Thickness: 1/64″-2″ Width: 1/8″-14″ Length: 18″-36″ |
Thickness: 1/64″-2″ Width: 1/8″-12″ Length: 18″-36″ |
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| Regular (metric) |
Thickness: 3-10mm Width: 15-150mm Length: 1m |
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| A-2 | Regular (inch) |
Thickness: 3/64″-2″ Width: 3/16″-12″ Length: 18″-36″ |
Thickness: 1/32″-2″ Width: 3/16″-12″ Length: 18″-36″ |
Thickness: 1/64″-3″ Width: 3/16″-12″ Length: 18″-36″ |
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| Regular (inch) |
Thickness: 1/8″-1/2″ Width: 1/2″-2″ Length: 72″ |
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| Oversize (inch) |
Thickness: 1/8″-2″ Width: 3/16″-12″ Length: 18″-36″ |
Thickness: 1/8″-3″ Width: 3/16″-12″ Length: 18″-36″ |
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| A-6 | Regular (inch) |
Thickness: 1/16″-1″ Width: 3/16″-12″ Length: 18″-36″ |
Thickness: 1/16″-1″ Width: 3/16″-12″ Length: 36″ |
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| Oversize (inch) |
Thickness: 1/16″-1″ Width: 3/16″-12″ Length: 18″-36″ |
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| D-2 | Regular (inch) |
Thickness: 1/16″-1″ Width: 1/2″-6″ Length: 18″-36″ |
Thickness: 1/32″-1.5″ Width: 3/16″-8″ Length: 18″-36″ |
Thickness: 1/16″-1″ Width: 2″-6″ Length: 18″-36″ |
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| Oversize (inch) |
Thickness: 1/8″-1″ Width: 1/2″-6″ Length: 18″-36″ |
Thickness: 1/32″-1.5″ Width: 3/16″-8″ Length: 18″-36″ |
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| M-2 | Regular (inch) |
Thickness: 1/16″-3/8″ Width: 3/16″-6″ Length: 18″-36″ |
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| Oversize (inch) |
Thickness: 1/16″-3/8″ Width: 3/16″-6″ Length: 18″-36″ |
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| H-13 | Oversize (inch) |
Thickness: 1/4″-1″ Width: 1″-4″ Length: 24″ |
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| W-1 | Regular (inch) |
Thickness: 1/16″-1″ Width: 1/16″-1″ Length: 36″ |
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| C-1018 | Regular (inch) |
Thickness: 1/16″-2.5″ Width: 3/16″-12″ Length: 24″ |
Thickness: 1/16″-2.5″ Width: 1/4″-14″ Length: 24″ |
Thickness: 1/16″-2.5″ Width: 3/16″-12″ Length: 24″ |
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| S-7 | Regular (inch) |
Thickness: 1/16″-1″ Width: 3/16″-12″ Length: 18″-36″ |
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| Oversize (inch) |
Thickness: 1/8″-1/2″ Width: 1/2″-6″ Length: 18″-36″ |
Thickness: 1/16″-1″ Width: 3/16″-12″ Length: 18″-36″ |
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| 4142 | Regular (inch) |
Thickness: 1/16″-1″ Width: 3/16″-10″ Length: 18″-36″ |
Thickness: 1/8″-1.5″ Width: 1/8″-14″ Length: 18″-36″ |
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| Regular (inch) |
Thickness: 1/8″-1″ Width: 5/16″-6″ Length: 72″ |
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| 440C | Oversize (inch) |
Thickness: 1/16″-2″ Width: 3/16″-12″ Length: 24″ |
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| 410 | Regular (inch) |
Thickness: 1/16″-1.5″ Width: 3/16″-12″ Length: 24″ |
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| 420 | Oversize (inch) |
Thickness: 1/4″-1.5″ Width: 1″-6″ Length: 24″ |