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Measuring Component
Manufacturer Model Number
DFARS Specialty Metals
Export Control Classification Number (ECCN)
REACH
RoHS
Starrett High-Accuracy Combination Square Heads
Attach to Starrett High-Accuracy Combination Square Blades with the included lockbolts.
Square Heads
 |
Square heads check 90° angles.
Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc heads.
Hardened Steel—Hardened steel heads are more durable and last longer than cast iron heads.
Center Heads
 |
Center heads identify the center on pipes, rods, and shafts.
Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc heads.
Hardened Steel—Hardened steel heads are more durable and last longer than cast iron heads.
Protractor Heads
 |
Protractor heads measure angles.
Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc heads.
Protractor | Cast Iron | ||||||
|---|---|---|---|---|---|---|---|
For Blade Lg. | Reversible | Features | Angle Measured Range | Graduations (Numeric Increments) | Each | ||
| 12" to 48" | No | Built-In Level | 0° to 180° | 1° (10°) | 1955A29 | 0000000 | |
| 12" to 48" | Yes | Built-In Level | 0° to 180° | 1° (10°) | 1955A25 | 000000 | |
 |
For Head Style | For Blade Lg. | Each | ||
|---|---|---|---|---|
| Center, Square, Protractor | 12" to 36"/300 mm to 600 mm | 1955A83 | 00000 |
High-Accuracy Combination Square Heads
Attach to High-Accuracy Combination Square Blades with the included lockbolts.
Square Heads
 |
Square heads check 90° angles.
Zinc—Zinc heads are lightweight and corrosion resistant.
Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc heads.
Hardened Cast Iron—Hardened cast iron heads are more durable and last longer than cast iron heads.
Center Heads
|
Center heads identify the center on pipes, rods, and shafts.
Zinc—Zinc heads are lightweight and corrosion resistant.
Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc heads.
Hardened Cast Iron—Hardened cast iron heads are more durable and last longer than cast iron heads.
Protractor Heads
 |
Protractor heads measure angles.
Zinc—Zinc heads are lightweight and corrosion resistant.
Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc heads.
