Starrett High-Accuracy Combination Square Blades
Use these blades with Starrett High-Accuracy Combination Square Heads. They meet Fed. Spec. GGG-R-791H, which establishes uniform standards for accuracy, graduations, and size. Blades are labeled with numeric increments that are less than 1" for quick reading. All have wear-resistant etched markings.
Satin-chrome finish is corrosion resistant and reduces glare.
Graduation | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Front Graduation Marks (Numeric Increments) | Back Graduation Marks (Numeric Increments) | Accuracy | Wd. | Thick. | Color | Color | Mark Style | Appearance | Each | |
Inch | |||||||||||
Chrome Plated Steel | |||||||||||
| 4" | 32nds (4/32"), 64ths (8/64") | 8ths (1"), 16ths (1") | -0.002" to +0.004" | 5/8" | 1/16" | Silver | Black | Etched | Satin | 0000000 | 000000 |
| 6" | 32nds (4/32"), 64ths (8/64") | 8ths (1"), 16ths (1") | -0.002" to +0.004" | 3/4" | 5/64" | Silver | Black | Etched | Satin | 0000000 | 00000 |
| 6" | 32nds (4/32"), 64ths (8/64") | 50ths (1/10"), 100ths (1/10") | -0.002" to +0.004" | 3/4" | 5/64" | Silver | Black | Etched | Satin | 0000000 | 00000 |
| 12" | 32nds (4/32"), 64ths (8/64") | 8ths (1"), 16ths (1") | -0.0035" to +0.005" | 1" | 3/32" | Silver | Black | Etched | Satin | 0000000 | 00000 |
| 12" | 32nds (4/32"), 64ths (8/64") | 50ths (1/10"), 100ths (1/10") | -0.0035" to +0.005" | 1" | 3/32" | Silver | Black | Etched | Satin | 0000000 | 000000 |
| 24" | 32nds (4/32"), 64ths (8/64") | 8ths (1"), 16ths (1") | -0.0035" to +0.007" | 1" | 3/32" | Silver | Black | Etched | Satin | 0000000 | 000000 |
| 24" | 32nds (4/32"), 64ths (8/64") | 50ths (1/10"), 100ths (1/10") | -0.0035" to +0.007" | 1" | 3/32" | Silver | Black | Etched | Satin | 0000000 | 000000 |
| 36" | 32nds (4/32"), 64ths (8/64") | 8ths (1"), 16ths (1") | -0.0035" to +0.007" | 1" | 3/32" | Silver | Black | Etched | Satin | 0000000 | 000000 |
Inch/Metric | |||||||||||
Chrome Plated Steel | |||||||||||
| 11 3/4"/300mm | 1/2 mm (10 mm), 32nds (4/32") | Millimeters (10 mm), 64ths (8/64") | -0.0035" to +0.005"/-0.09 mm to +0.15 mm | 1" | 3/32" | Silver | Black | Etched | Satin | 0000000 | 000000 |
| 23 1/2"/600mm | 1/2 mm (10 mm), 32nds (4/32") | Millimeters (10 mm), 64ths (8/64") | -0.0035" to +0.007"/-0.11 mm to +0.25 mm | 1" | 3/32" | Silver | Black | Etched | Satin | 0000000 | 000000 |
Starrett High-Accuracy Combination Square Heads
Attach to Starrett High-Accuracy Combination Square Blades with the included lockbolts.
Square head checks 90° angles. Center head identifies the center on pipes, rods, and shafts. Protractor head measures angles.
Hardened-steel heads are more durable and last longer than cast iron heads.
Protractor | |||||
|---|---|---|---|---|---|
| Component | For Blade Lgs. | Angle Measuring Range | Graduation Marks (Numeric Increments) | Each | |
Cast Iron | |||||
| Square Head | 4" | __ | __ | 0000000 | 000000 |
| Square Head with Built-in Level | 6" | __ | __ | 0000000 | 00000 |
| Square Head with Built-in Level | 12"-48" | __ | __ | 0000000 | 00000 |
| Center Head | 4" | __ | __ | 0000000 | 00000 |
| Center Head | 6" | __ | __ | 0000000 | 00000 |
| Center Head | 12"-48" | __ | __ | 0000000 | 00000 |
| Nonreversible Protractor Head with Built-in Level | 12"-48" | 0°-180° | 1° (10°) | 0000000 | 000000 |
| Reversible Protractor Head with Built-in Level | 12"-48" | 0°-180° | 1° (10°) | 0000000 | 000000 |
Hardened Steel | |||||
| Square Head | 4" | __ | __ | 0000000 | 00000 |
| Square Head with Built-in Level | 6" | __ | __ | 0000000 | 00000 |
| Square Head with Built-in Level | 12"-48" | __ | __ | 0000000 | 000000 |
| Center Head | 4" | __ | __ | 0000000 | 00000 |
| Center Head | 6" | __ | __ | 0000000 | 000000 |
| Center Head | 12"-48" | __ | __ | 0000000 | 000000 |
High-Accuracy Combination Square Blades
Blades are for use with High-Accuracy Combination Square Heads. Blades are labeled with numeric increments that are less than 1" for quick-reading. All have a corrosion-resistant satin chrome-plated finish that reduces glare and wear-resistant etched markings.
Graduation | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Front Graduation Marks (Numeric Increments) | Back Graduation Marks (Numeric Increments) | Accuracy | Wd. | Thick. | Color | Color | Mark Style | Each | |
Inch | ||||||||||
Satin Chrome-Plated Steel | ||||||||||
| 6" | 32nds (4/32"), 64ths (8/64") | 8ths (1"), 16ths (1") | -0.0025" to +0.0025" | 3/4" | 5/64" | Silver | Black | Etched | 00000000 | 000000 |
| 6" | 32nds (4/32"), 64ths (8/64") | 50ths (1/10"), 100ths (1/10") | -0.0025" to +0.0025" | 3/4" | 5/64" | Silver | Black | Etched | 00000000 | 00000 |
| 12" | 32nds (4/32"), 64ths (8/64") | 8ths (1"), 16ths (1") | -0.0025" to +0.0025" | 1" | 3/32" | Silver | Black | Etched | 00000000 | 00000 |
| 12" | 32nds (4/32"), 64ths (8/64") | 50ths (1/10"), 100ths (1/10") | -0.0025" to +0.0025" | 1" | 3/32" | Silver | Black | Etched | 00000000 | 00000 |
| 18" | 32nds (4/32"), 64ths (8/64") | 8ths (1"), 16ths (1") | -0.0025" to +0.0025" | 1" | 3/32" | Silver | Black | Etched | 00000000 | 00000 |
| 18" | 32nds (4/32"), 64ths (8/64") | 50ths (1/10"), 100ths (1/10") | -0.0025" to +0.0025" | 1" | 3/32" | Silver | Black | Etched | 00000000 | 00000 |
| 24" | 32nds (4/32"), 64ths (8/64") | 8ths (1"), 16ths (1") | -0.0025" to +0.0025" | 1" | 3/32" | Silver | Black | Etched | 00000000 | 000000 |
| 24" | 32nds (4/32"), 64ths (8/64") | 50ths (1/10"), 100ths (1/10") | -0.0025" to +0.0025" | 1" | 3/32" | Silver | Black | Etched | 00000000 | 000000 |
High-Accuracy Combination Square Heads
Attach to High-Accuracy Combination Square Blades with the included lockbolts.
Square head checks 90° angles.
Center head identifies the center on pipes, rods, and shafts.
Protractor head measures angles.
Zinc heads are lightweight and corrosion resistant. Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc heads. Hardened cast iron heads are more durable and last longer than cast iron heads.
Combination Square Heads | |||||||
|---|---|---|---|---|---|---|---|
Protractor | Replacement Lockbolts | ||||||
| Component | For Blade Lgs. | Angle Measuring Range | Graduation Marks (Numeric Increments) | Each | Each | ||
Zinc | |||||||
| Square Head with Built-in Level | 12"-24" | __ | __ | 00000000 | 00000 | 000000000 | 00000 |
| Center Head | 12"-24" | __ | __ | 00000000 | 0000 | 000000000 | 0000 |
| Reversible Protractor Head | 12"-24" | 0°-180° | 1° (10°) | 00000000 | 00000 | 000000000 | 0000 |
Cast Iron | |||||||
| Square Head with Built-in Level | 12"-24" | __ | __ | 00000000 | 00000 | 00000000 | 0000 |
| Center Head | 12"-24" | __ | __ | 00000000 | 00000 | 00000000 | 0000 |
| Reversible Protractor Head | 12"-24" | 0°-180° | 1° (10°) | 00000000 | 00000 | 00000000 | 0000 |
Hardened Cast Iron | |||||||
| Square Head with Built-in Level | 12"-24" | __ | __ | 00000000 | 00000 | 00000000 | 0000 |
| Center Head | 12"-24" | __ | __ | 00000000 | 00000 | 00000000 | 0000 |