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Starrett High-Accuracy Squares
 |
These squares meet Fed. Spec. GGG-S-656-E, which establishes uniform standards for square accuracy to ensure reliable, repeatable angles.
Squares | Measuring Square Cases | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Blade | |||||||||||
Angle Measured | Blade Lg. | Wd. | Thk. | Min. Lg. Accuracy | Color | Each | Each | ||||
Inch | |||||||||||
Steel | |||||||||||
| 90° | 1 1/2" × 1 1/2" | 1/2" × 17/32" | 3/64" × 1/4" | 0.0001" | Silver | 2275A12 | 0000000 | 2275A13 | 000000 | ||
| 90° | 3" × 2 3/8" | 47/64" × 7/8" | 1/16" × 13/32" | 0.0001" | Silver | 2275A14 | 000000 | 2275A15 | 00000 | ||
| 90° | 4 1/2" × 3 1/2" | 1 1/8" × 15/16" | 23/32" × 1/2" | 0.0001" | Silver | 2275A16 | 000000 | 2275A17 | 00000 | ||
| 90° | 6" × 4 5/16" | 1 5/16" × 1 1/16" | 5/64" × 1/2" | 0.0001" | Silver | 2275A18 | 000000 | 2275A19 | 00000 | ||
| 90° | 12" × 7" | 2" × 1 31/64" | 5/64" × 3/4" | 0.0002" | Silver | 2275A24 | 00000000 | 2275A26 | 000000 | ||
