Miter Squares | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	Blade Length Blade Length

	Square Head Material Square Head Material

Iron

Aluminum

Steel

	Graduation Marks Graduation Marks

	Numeric Increments Numeric Increments

1/10"

4/32"

10 mm

	Graduation Location Graduation Location

Back

Front

	Component Component

Blade

Square Head with Built-in
Level

Reversible Protractor Head
with Built-in Level

Nonreversible Protractor
Head with Built-in Level

Reversible Protractor Head

	Blade Color Blade Color

	Silver
	Gold

	Center Head Material Center Head Material

Iron

Aluminum

Steel

	Head Length Head Length

3 5/8"

4 1/4"

4 1/2"

	Protractor Head Material Protractor Head Material

Iron

Aluminum

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

DFARS Specialty Metals
COTS-Exempt

	Manufacturer Model Number Manufacturer Model Number

	For Maximum Blade Length For Maximum Blade Length

24"

48"

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26 Products

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.

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 Heads

Attach to Starrett High-Accuracy Combination Square Blades with the included lockbolts. Protractor head measures angles.

Protractor Head

		Protractor
Component	For Blade Lgs.	Angle Measuring Range	Graduation Marks (Numeric Increments)		Each
Cast Iron
Nonreversible Protractor Head with Built-in Level	12"-48"	0°-180°	1° (10°)	0000000	0000000
Reversible Protractor Head with Built-in Level	12"-48"	0°-180°	1° (10°)	0000000	000000

Replacement Lockbolts

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

High-Accuracy Combination Squares

Use these squares in place of your try square, miter square, depth gauge, height gauge, center-point finder, and level. Blades are labeled with numeric increments that are less than 1" for quick reading. All have a corrosion-resistant satin-chrome finish that reduces glare and wear-resistant etched markings.

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

Hardened cast iron heads are more durable and last longer than cast iron heads.

Blade with Square Head with Built-in Level, Center Head, Reversible Protractor 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
12"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0025" to +0.0025"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	4 1/2"	00000000	0000000
Hardened Cast Iron Heads
Inch
12"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.0025" to +0.0025"	1"	3/32"	Satin-Chrome Steel	Silver	Black	Etched	4 1/2"	00000000	000000

Replacement Lockbolt

00000000

Each

00000

High-Accuracy Combination Square Heads

Protractor Head

Attach to High-Accuracy Combination Square Blades with the included lockbolts. Protractor head measures angles.

		Protractor
Component	For Blade Lgs.	Angle Measuring Range	Graduation Marks (Numeric Increments)		Each
Cast Iron
Reversible Protractor Head	12"-24"	0°-180°	1° (10°)	00000000	000000

Replacement Lockbolt

00000000

Each

00000

Combination Squares

Replace your try square, miter square, depth gauge, marking gauge, 90° level, ruler, and scriber with one tool. Blades labeled with numeric increments that are less than 1" are 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.

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

Inch/Metric

			Blade				Graduation			Aluminum Heads
Blade Lg.	Front Graduation Marks (Numeric Increments)	Back Graduation Marks (Numeric Increments)	Wd.	Thick.	Material	Color	Color	Mark Style	Head Lg.		Each
Inch/Metric
12"/300mm	Millimeters (10 mm), 32nds (4/32")	Millimeters (10 mm), 16ths (1")	1"	3/32"	Steel	Silver	Black	Etched	4 1/4"	000000	000000

Scratch-Resistant High-Accuracy Combination Squares

A titanium coating protects the blade against scratches and wear. Use these squares to replace your try square, miter square, depth gauge, height gauge, center-point finder, and level. 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.

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

Inch

				Blade				Graduation			Cast Iron Heads
Blade Lg.	Front Graduation Marks (Numeric Increments)	Back Graduation Marks (Numeric Increments)	Accuracy	Wd.	Thick.	Material	Color	Color	Mark Style	Head Lg.		Each
Inch
12"	32nds (4/32"), 64ths (8/64")	8ths (1"), 16ths (1")	-0.002" to +0.002"	1"	3/32"	Titanium-Coated Steel	Gold	Black	Etched	4 1/2"	00000000	0000000