Starrett Angle Gauges | McMaster-Carr

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Starrett

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Starrett

Mitutoyo

	Angles Measured Angles Measured

	Manufacturer Model Number Manufacturer Model Number

	Material Material

Steel

Iron

	System of Measurement System of Measurement

Inch

Metric

	Arm Length Arm Length

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Graduation Marks Graduation Marks

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	Maximum Angle Measuring Maximum Angle Measuring

180°

	Blade Length Blade Length

	Head Shape Head Shape

Rectangular

Half Round

	Head Width Head Width

3 1/4"

3 3/8"

	Graduation Mark Style Graduation Mark Style

Etched

	Graduation Color Graduation Color

	Black

	Numeric Increments Numeric Increments

	Number of Arms Number of Arms

	Component Component

Blade

Square Head with Built-in
Level

Center Head

Square Head

Nonreversible Protractor
Head with Built-in Level

Reversible Protractor Head
with Built-in Level

	Color Color

	Silver

	Finish Finish

Satin Chrome

	Minimum Angle Measuring Minimum Angle Measuring

0°

	Blade Width Blade Width

86 Products

Starrett Protractors with Graduated Arm

Measure angles and dimensions with one tool. Protractor has graduations from 0° to 180° in both directions. Also known as a bevel protractor, it has an adjustable arm. The arm is narrow to fit into holes for use as a depth gauge. It has a corrosion-resistant satin-chrome finish that reduces glare and wear-resistant etched markings.

			Arm				Graduation		Head
Angle Measuring Range	Graduation Marks (Numeric Increments)	No. of Arms	Lg.	Wd.	Front Graduation Marks (Numeric Increments)	Back Graduation Marks (Numeric Increments)	Color	Mark Style	Shape	Ht.	Wd.	Color	Manufacturer Model No.		Each
Inch
Satin-Chrome Steel
0°-180°	1° (10°)	1	6"	3/16"	Inches (1"), 64ths (1")	Inches (1"), 32nds (1")	Black	Etched	Rectangular	2"	3 3/8"	Silver	C493B	00000000	0000000

Starrett Protractors

Half-Round Head

Rectangular Head

Also known as bevel protractors, set bevels and measure angles with the adjustable arm. All have graduations from 0° to 180° in both directions. They have a corrosion-resistant satin-chrome finish that reduces glare and wear-resistant etched markings.

				Head				Graduation
Angle Measuring Range	Graduation Marks (Numeric Increments)	No. of Arms	Arm Lg.	Shape	Ht.	Wd.	Color	Color	Mark Style	Manufacturer Model No.		Each
Steel
0°-180°	1° (10°)	1	6"	Half Round	2"	3 1/4"	Silver	Black	Etched	C19	0000000	0000000
0°-180°	1° (10°)	1	6"	Rectangular	2"	3 3/8"	Silver	Black	Etched	C183	0000000	000000

Angle Identifiers

These gauges have 18 leaves that swing out when you want to quickly check an angle. They're more convenient than a protractor when identifying 45° and smaller angles. The 14 1/2° angle leaf measures half the Acme standard 29° angle.

				Folded
Manufacturer	Manufacturer Model Number	Angles Measured	Material	Lg.	Wd.		Each
Starrett	466	1°, 2°, 3°, 4°, 5°, 7°, 8°, 9°, 10°, 12°, 14°, 14 1/2°, 15°, 20°, 25°, 30°, 35°, 45°	Steel	4 3/16"	1 1/16"	0000000	0000000

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.

Blade
Lg.	Wd.	Thick.	Accuracy	Color	Container	Container Material		Each
Inch
Steel
1 1/2" × 1 1/2"	1/2" × 17/32"	3/64" × 1/4"	+0.0001"	Silver	Case	Wood	0000000	0000000
3" × 2 3/8"	47/64" × 7/8"	1/16" × 13/32"	+0.0001"	Silver	Case	Wood	0000000	000000
4 1/2" × 3 1/2"	1 1/8" × 15/16"	23/32" × 1/2"	+0.0001"	Silver	Case	Wood	0000000	000000
6" × 4 5/16"	1 5/16" × 1 1/16"	5/64" × 1/2"	+0.0001"	Silver	Case	Wood	0000000	000000
12" × 7"	2" × 1 31/64"	5/64" × 3/4"	+0.0002"	Silver	Case	Wood	0000000	00000000

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.

Square Head

Center Head

Protractor Head

		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	00000

Replacement Lockbolts

For Head Style	For Blade Lgs.		Each
Center	6"	0000000	000000
Square, Center	4"	0000000	00000
Square, Center	6"	0000000	00000
Square, Center, Protractor	12"-36"/300 mm-600 mm	0000000	0000

Starrett High-Accuracy Combination Squares

Replace your try square, miter square, depth gauge, height gauge, center-point finder, and level. The blade on these squares meets 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.

Square head checks 90° angles. Center head identifies the center on pipes, rods, and shafts. Protractor head measures angles.

Satin-chrome blade finish is corrosion resistant and reduces glare. Hardened-steel heads are more durable and last longer than cast iron heads.

Blade with Square Head

Inch

				Blade				Graduation
Blade Lg.	Front Grad. Marks (Increments)	Back Grad. Marks (Increments)	Accuracy	Wd.	Thick.	Material	Color	Color	Mark Style	Head Lg.		Each
Cast Iron Head
Inch
4"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.002" to +0.004"	5/8"	1/16"	Satin-Chrome Steel	Silver	Black	Etched	2 1/4"	0000000	0000000
Hardened Steel Head
Inch
4"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.002" to +0.004"	5/8"	1/16"	Satin-Chrome Steel	Silver	Black	Etched	2 1/4"	0000000	000000

Replacement Lockbolt for Square and Center Heads

0000000

Each

000000

Blade with Square Head and Center Head

Inch

				Blade				Graduation
Blade Lg.	Front Grad. Marks (Increments)	Back Grad. Marks (Increments)	Accuracy	Wd.	Thick.	Material	Color	Color	Mark Style	Head Lg.		Each
Cast Iron Heads
Inch
4"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.002" to +0.004"	5/8"	1/16"	Satin-Chrome Steel	Silver	Black	Etched	2 1/4"	0000000	0000000
Hardened Steel Heads
Inch
4"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.002" to +0.004"	5/8"	1/16"	Satin-Chrome Steel	Silver	Black	Etched	2 1/4"	0000000	000000

Replacement Lockbolt for Square and Center Heads

0000000

Each

000000

Blade with Square Head with Built-in Level and Scriber

Inch

Inch/Metric

				Blade				Graduation
Blade Lg.	Front Grad. Marks (Increments)	Back Grad. Marks (Increments)	Accuracy	Wd.	Thick.	Material	Color	Color	Mark Style	Head Lg.		Each
Cast Iron Head
Inch
6"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.002" to +0.004"	3/4"	5/64"	Steel	Silver	Black	Etched	2 13/32"	0000000	0000000
6"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.002" to +0.004"	3/4"	5/64"	Satin-Chrome Steel	Silver	Black	Etched	2 13/32"	0000000	000000
6"	32nds (4/32"), 64ths (8/64")	50ths (1/10"), 100ths (1/10")	-0.002" to +0.004"	3/4"	5/64"	Satin-Chrome Steel	Silver	Black	Etched	2 13/32"	0000000	000000
12"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.005"	1"	3/32"	Steel	Silver	Black	Etched	4 1/2"	0000000	000000
12"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.005"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	4 1/2"	0000000	000000
12"	32nds (4/32"), 64ths (8/64")	50ths (1/10"), 100ths (1/10")	-0.0035" to +0.005"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	4 1/2"	0000000	000000
18"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.006"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	4 1/2"	0000000	000000
24"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.007"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	4 1/2"	0000000	000000
Inch/Metric
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"	Satin-Chrome Steel	Silver	Black	Etched	4 1/2"	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"	Satin-Chrome Steel	Silver	Black	Etched	4 1/2"	0000000	000000
Hardened Steel Head
Inch
6"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.002" to +0.004"	3/4"	5/64"	Satin-Chrome Steel	Silver	Black	Etched	2 13/32"	0000000	000000
6"	32nds (4/32"), 64ths (8/64")	50ths (1/10"), 100ths (1/10")	-0.002" to +0.004"	3/4"	5/64"	Satin-Chrome Steel	Silver	Black	Etched	2 13/32"	0000000	000000
12"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.005"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	3 5/8"	0000000	000000
12"	32nds (4/32"), 64ths (8/64")	50ths (1/10"), 100ths (1/10")	-0.0035" to +0.005"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	3 5/8"	0000000	000000
18"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.006"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	3 5/8"	0000000	000000
24"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.007"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	3 5/8"	0000000	000000
24"	32nds (4/32"), 64ths (8/64")	50ths (1/10"), 100ths (1/10")	-0.0035" to +0.007"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	3 5/8"	0000000	000000
Inch/Metric
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"	Satin-Chrome Steel	Silver	Black	Etched	3 5/8"	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"	Satin-Chrome Steel	Silver	Black	Etched	3 5/8"	0000000	000000

Replacement Lockbolt for Square, Center, and Protractor Heads	0000000	Each	00000
Replacement Lockbolt for Square and Center Heads	0000000	Each	00000

Blade with Square Head with Built-in Level, Center Head, and Scriber

Inch

				Blade				Graduation
Blade Lg.	Front Grad. Marks (Increments)	Back Grad. Marks (Increments)	Accuracy	Wd.	Thick.	Material	Color	Color	Mark Style	Head Lg.		Each
Cast Iron Heads
Inch
6"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.002" to +0.004"	3/4"	5/64"	Satin-Chrome Steel	Silver	Black	Etched	2 13/32"	0000000	0000000
12"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.005"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	4 1/2"	0000000	000000
12"	32nds (4/32"), 64ths (8/64")	50ths (1/10"), 100ths (1/10")	-0.0035" to +0.005"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	4 1/2"	0000000	000000
24"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.007"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	4 1/2"	0000000	000000
Hardened Steel Heads
Inch
6"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.002" to +0.004"	3/4"	5/64"	Satin-Chrome Steel	Silver	Black	Etched	2 13/32"	0000000	000000
12"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.005"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	3 5/8"	0000000	000000
18"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.006"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	3 5/8"	0000000	000000
24"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.007"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	3 5/8"	0000000	000000

Replacement Lockbolt for Square, Center, and Protractor Heads	0000000	Each	00000
Replacement Lockbolt for Square and Center Heads	0000000	Each	00000
Replacement Lockbolt for Center Heads	0000000	Each	00000

Blade with Square Head with Built-in Level, Center Head, Protractor Head, and Scriber

Inch

				Blade				Graduation			Cast Iron Heads
Blade Lg.	Front Grad. Marks (Increments)	Back Grad. Marks (Increments)	Accuracy	Wd.	Thick.	Material	Color	Color	Mark Style	Head Lg.		Each
Inch
12"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.005"	1"	3/32"	Steel	Silver	Black	Etched	4 1/2"	0000000	0000000
18"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.006"	1"	3/32"	Steel	Silver	Black	Etched	4 1/2"	0000000	000000
24"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.007"	1"	3/32"	Steel	Silver	Black	Etched	4 1/2"	0000000	000000

Replacement Lockbolt for Square, Center, and Protractor Heads

0000000

Each

00000

Blade with Square Head with Built-in Level, Center Head, Reversible Protractor Head, and Scriber


	Inch
	Inch/Metric

				Blade				Graduation
Blade Lg.	Front Grad. Marks (Increments)	Back Grad. Marks (Increments)	Accuracy	Wd.	Thick.	Material	Color	Color	Mark Style	Head Lg.		Each
Cast Iron Heads
Inch
12"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.005"	1"	3/32"	Steel	Silver	Black	Etched	4 1/2"	0000000	0000000
12"	32nds (4/32"), 64ths (8/64")	50ths (1/10"), 100ths (1/10")	-0.0035" to +0.005"	1"	3/32"	Steel	Silver	Black	Etched	4 1/2"	0000000	000000
18"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.006"	1"	3/32"	Steel	Silver	Black	Etched	4 1/2"	0000000	000000
24"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.007"	1"	3/32"	Steel	Silver	Black	Etched	4 1/2"	0000000	000000
Inch/Metric
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"	Steel	Silver	Black	Etched	4 1/2"	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"	Steel	Silver	Black	Etched	4 1/2"	0000000	000000
Hardened Steel Heads
Inch
12"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.005"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	3 5/8"	0000000	000000
12"	32nds (4/32"), 64ths (8/64")	50ths (1/10"), 100ths (1/10")	-0.0035" to +0.005"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	3 5/8"	0000000	000000
18"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.006"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	3 5/8"	0000000	000000
18"	32nds (4/32"), 64ths (8/64")	50ths (1/10"), 100ths (1/10")	-0.0035" to +0.006"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	3 5/8"	0000000	000000
24"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.007"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	3 5/8"	0000000	000000
24"	32nds (4/32"), 64ths (8/64")	50ths (1/10"), 100ths (1/10")	-0.0035" to +0.007"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	3 5/8"	0000000	000000
Inch/Metric
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"	Satin-Chrome Steel	Silver	Black	Etched	3 5/8"	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"	Satin-Chrome Steel	Silver	Black	Etched	3 5/8"	0000000	000000

Replacement Lockbolt for Square, Center, and Protractor Heads

0000000

Each

00000

Starrett High-Accuracy Combination Square Blades

Inch

Inch/Metric

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		Each
Inch
Satin-Chrome Steel
4"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.002" to +0.004"	5/8"	1/16"	Silver	Black	Etched	0000000	000000
4"	32nds (4/32"), 64ths (8/64")	50ths (1/10"), 100ths (1/10")	-0.002" to +0.004"	5/8"	1/16"	Silver	Black	Etched	0000000	00000
6"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.002" to +0.004"	3/4"	5/64"	Silver	Black	Etched	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	0000000	00000
12"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.005"	1"	3/32"	Silver	Black	Etched	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	0000000	00000
24"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.007"	1"	3/32"	Silver	Black	Etched	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	0000000	000000
36"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0035" to +0.007"	1"	3/32"	Silver	Black	Etched	0000000	000000
Inch/Metric
Satin-Chrome 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	0000000	00000
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	0000000	000000