Tenth-Reading Rulers | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	Length Length

	Width Width

	Thickness Thickness

	Graduation Marks Graduation Marks

	Numeric Increments Numeric Increments

1/10"

8/64"

1 cm

	Graduation Location Graduation Location

Front

Back

	Flexibility Flexibility

Flexible

Rigid

	Material Material

	Color Color

	Silver		Black
	Clear		Gold

	Graduation Mark Style Graduation Mark Style

Etched

Printed

	Finish Finish

Satin Chrome

Titanium Nitride (TiN) Coated

	Graduation Color Graduation Color

	Black
	White

	Certification Certification

NIST Calibration Certificate

NIST Calibration Certificate
with Test Data

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

DFARS Specialty Metals
COTS-Exempt

	Manufacturer Model Number Manufacturer Model Number

	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

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74 Products

High-Accuracy Rulers

Inch

An economical alternative to Starrett High-Accuracy Rulers, these provide reliable, repeatable measurements. All meet Fed. Spec. GGG-R-791H, which establishes uniform standards for ruler accuracy, graduations, and size. They're also known as machinists' rules. They have a corrosion-resistant satin-chrome finish that reduces glare and wear-resistant etched markings. Inch and inch/metric rulers are labeled with numeric increments that are less than 1" for quick reading.

Flexible rulers are for measuring slightly curved surfaces.

Inch—Left to Right Reading Direction
Lg.	Front Graduation Marks (Numeric Increments)	Back Graduation Marks (Numeric Increments)	Accuracy	Wd.	Thick.	Flexibility	Color	Graduation Mark Style		Each
Satin-Chrome Steel
6"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.004"	1/2"	1/64"	Flexible	Silver	Etched	0000000	000000
6"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.004"	3/4"	3/64"	Rigid	Silver	Etched	0000000	00000
6"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 50ths (1/10")	-0.0035" to +0.004"	1/2"	1/64"	Flexible	Silver	Etched	0000000	00000
6"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 50ths (1/10")	-0.0035" to +0.004"	3/4"	3/64"	Rigid	Silver	Etched	0000000	00000
12"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.005"	1/2"	1/64"	Flexible	Silver	Etched	0000000	00000
12"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.005"	1"	3/64"	Rigid	Silver	Etched	0000000	00000
12"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 50ths (1/10")	-0.0035" to +0.005"	1/2"	1/64"	Flexible	Silver	Etched	0000000	00000
12"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 50ths (1/10")	-0.0035" to +0.005"	1"	3/64"	Rigid	Silver	Etched	0000000	00000
18"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.006"	3/4"	1/64"	Flexible	Silver	Etched	0000000	00000
18"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.006"	1 1/8"	3/64"	Rigid	Silver	Etched	0000000	00000
18"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 50ths (1/10")	-0.0035" to +0.006"	3/4"	1/64"	Flexible	Silver	Etched	0000000	00000
18"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 50ths (1/10")	-0.0035" to +0.006"	1 1/8"	3/64"	Rigid	Silver	Etched	0000000	00000
24"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.007"	3/4"	1/64"	Flexible	Silver	Etched	0000000	00000
24"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.007"	1 1/8"	3/64"	Rigid	Silver	Etched	0000000	00000
36"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.007"	3/4"	1/64"	Flexible	Silver	Etched	0000000	000000
36"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.007"	1 1/4"	3/64"	Rigid	Silver	Etched	0000000	000000
48"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.008"	3/4"	1/64"	Flexible	Silver	Etched	0000000	000000
48"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.008"	1 1/4"	3/64"	Rigid	Silver	Etched	0000000	000000

Certified High-Accuracy Rulers

Inch

These rulers include a certificate of calibration traceable to NIST with test measurements that confirm accuracy. An economical alternative to Starrett Certified High-Accuracy Rulers, they provide reliable, repeatable measurements. All meet Fed. Spec. GGG-R-791H, which establishes uniform standards for ruler accuracy, graduations, and size. They’re also known as machinists’ rules. They have a corrosion-resistant satin-chrome finish that reduces glare and wear-resistant etched markings. These rulers are labeled with numeric increments that are less than 1" for quick reading.

Flexible rulers are for measuring slightly curved surfaces.

Inch—Left to Right Reading Direction
Lg.	Front Graduation Marks (Numeric Increments)	Back Graduation Marks (Numeric Increments)	Accuracy	Wd.	Thick.	Flexibility	Color	Graduation Mark Style		Each
Satin-Chrome Steel
6"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.004"	1/2"	1/64"	Flexible	Silver	Etched	0000000	000000
6"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.004"	3/4"	3/64"	Rigid	Silver	Etched	0000000	00000
12"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.005"	1/2"	1/64"	Flexible	Silver	Etched	0000000	00000
12"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.005"	1"	3/64"	Rigid	Silver	Etched	0000000	00000
24"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.007"	3/4"	1/64"	Flexible	Silver	Etched	0000000	000000
24"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.007"	1 1/8"	3/64"	Rigid	Silver	Etched	0000000	000000
36"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.007"	3/4"	1/64"	Flexible	Silver	Etched	0000000	000000
36"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.007"	1 1/8"	3/64"	Rigid	Silver	Etched	0000000	000000
48"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.008"	1 1/4"	3/64"	Rigid	Silver	Etched	0000000	000000

Starrett High-Accuracy Rulers

Inch

Inch/Metric

Also known as machinists’ rules, these rulers ensure reliable, repeatable measurements. They meet Fed. Spec. GGG-R-791H, which establishes uniform standards for ruler accuracy, graduations, and size. All have a corrosion-resistant satin-chrome finish that reduces glare and wear-resistant etched markings. Inch and inch/metric rulers are labeled with numeric increments that are less than 1" for quick reading.

Flexible rulers are for measuring slightly curved surfaces.

Inch—Left to Right Reading Direction
Lg.	Front Graduation Marks (Numeric Increments)	Back Graduation Marks (Numeric Increments)	Accuracy	Wd.	Thick.	Flexibility	Color	Graduation Mark Style	Manufacturer Model No.		Each
Satin-Chrome Steel
6"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.004"	1/2"	1/64"	Flexible	Silver	Etched	C305R-6	000000	000000
6"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 50ths (1/10")	-0.0035" to +0.004"	1/2"	1/64"	Flexible	Silver	Etched	C303R-6	0000000	00000
6"	32nds (4/32"), 64ths (8/64")	50ths (1/10"), 100ths (1/10")	-0.0035" to +0.004"	1/2"	1/64"	Flexible	Silver	Etched	C316R-6	0000000	00000
6"	32nds (4/32"), 64ths (8/64")	50ths (1/10"), 100ths (1/10")	-0.0035" to +0.004"	3/4"	3/64"	Rigid	Silver	Etched	C616R-6	0000000	00000
6"	50ths (1/10"), 50ths (1/10")	10ths (1/10"), 10ths (1/10")	-0.0035" to +0.004"	3/4"	3/64"	Rigid	Silver	Etched	C606R-6	0000000	00000
12"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.005"	1/2"	1/64"	Flexible	Silver	Etched	C305R-12	000000	00000
12"	32nds (4/32"), 64ths (8/64")	50ths (1/10"), 100ths (1/10")	-0.0035" to +0.005"	1/2"	1/64"	Flexible	Silver	Etched	C316R-12	0000000	00000
12"	32nds (4/32"), 64ths (8/64")	50ths (1/10"), 100ths (1/10")	-0.0035" to +0.005"	1"	3/64"	Rigid	Silver	Etched	C616R-12	0000000	00000
18"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.006"	3/4"	1/64"	Flexible	Silver	Etched	C305R-18	000000	000000
24"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.007"	3/4"	1/64"	Flexible	Silver	Etched	C305R-24	000000	000000
72"	32nds (4/32"), 64ths (8/64")	50ths (1/10"), 100ths (1/10")	-0.007" to +0.012"	1 1/2"	3/32"	Rigid	Silver	Etched	C416R-72	0000000	00000000
Inch/Metric—Left to Right Reading Direction
Satin-Chrome Steel
5 3/4"/150 mm	10ths (1/10"), 50ths (1/10")	Millimeters (10 mm), 1/2 mm (10 mm)	-0.0035" to +0.004"/-0.09 mm to +0.1 mm	1/2"	1/64"	Flexible	Silver	Etched	C334-150	0000000	00000

Starrett Certified High-Accuracy Rulers

Inch

Inch/Metric

Ensure reliable, repeatable measurements with these rulers. They include a calibration certificate traceable to NIST stating they have passed a test for accuracy. All meet Fed. Spec. GGG-R-791H, which establishes uniform standards for ruler accuracy, graduations, and size. They're also known as machinists' rules. They have a corrosion-resistant satin-chrome finish that reduces glare and wear-resistant etched markings. These rulers are labeled with numeric increments that are less than 1" for quick reading.

Inch—Left to Right Reading Direction
Lg.	Front Graduation Marks (Numeric Increments)	Back Graduation Marks (Numeric Increments)	Accuracy	Wd.	Thick.	Flexibility	Color	Graduation Mark Style	Manufacturer Model No.		Each
Satin-Chrome Steel
6"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.004"	1/2"	1/64"	Rigid	Silver	Etched	C305R-6	0000000	000000
6"	50ths (1/10"), 50ths (1/10")	10ths (1/10"), 10ths (1/10")	-0.0035" to +0.004"	3/4"	3/64"	Rigid	Silver	Etched	C606R-6	0000000	00000
12"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.005"	1/2"	1/64"	Rigid	Silver	Etched	C305R-12	0000000	000000
Inch/Metric—Left to Right Reading Direction
Satin-Chrome Steel
5 3/4"/150 mm	10ths (1/10"), 50ths (1/10")	Millimeters (10 mm), 1/2 mm (10 mm)	-0.0035" to +0.004"/-0.09 mm to +0.1 mm	1/2"	1/64"	Rigid	Silver	Etched	C334-150	0000000	00000

Scratch-Resistant High-Accuracy Rulers

Inch

Protect your ruler from scratches and wear with a TiN (titanium nitride) coating. Also known as machinists’ rules, these rulers ensure reliable, repeatable measurements. They meet Fed. Spec. GGG-R-791H, which establishes uniform standards for ruler accuracy, graduations, and size. All have wear-resistant etched markings and are labeled with numeric increments that are less than 1" for quick reading.

Flexible rulers are for measuring slightly curved surfaces.

Inch—Left to Right Reading Direction
Lg.	Front Graduation Marks (Numeric Increments)	Back Graduation Marks (Numeric Increments)	Accuracy	Wd.	Thick.	Flexibility	Color	Graduation Mark Style		Each
Titanium Nitride (TiN) Coated Steel
6"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.004"	1/2"	1/64"	Flexible	Gold	Etched	00000000	000000
6"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.004"	3/4"	3/64"	Rigid	Gold	Etched	00000000	00000
12"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.005"	1/2"	1/64"	Flexible	Gold	Etched	00000000	00000
12"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	-0.0035" to +0.005"	1"	3/64"	Rigid	Gold	Etched	00000000	00000

Lightweight Aluminum Rulers

Inch

Made of aluminum, these rulers are an economical alternative to Corrosion-Resistant Stainless Steel Rulers. Inch rulers labeled with numeric increments that are less than 1" are quick reading.

Inch—Left to Right Reading Direction
Lg.	Front Graduation Marks (Numeric Increments)	Wd.	Thick.	Flexibility	Color	Graduation Mark Style	Hole Dia.		Each
Aluminum
12"	10ths (1"), 10ths (1/10")	1"	3/64"	Rigid	Silver	Printed	1/4"	0000000	000000
24"	10ths (1"), 10ths (1/10")	1"	3/64"	Rigid	Silver	Printed	1/4"	0000000	00000
36"	10ths (1"), 10ths (1/10")	1"	3/64"	Rigid	Silver	Printed	1/4"	0000000	00000
48"	10ths (1"), 10ths (1/10")	1"	1/16"	Rigid	Silver	Printed	1/4"	0000000	00000
60"	10ths (1"), 10ths (1/10")	1"	1/16"	Rigid	Silver	Printed	1/4"	0000000	00000
72"	10ths (1"), 10ths (1/10")	1"	1/16"	Rigid	Silver	Printed	1/4"	0000000	00000
96"	10ths (1"), 10ths (1/10")	1"	1/16"	Rigid	Silver	Printed	1/4"	0000000	00000
120"	10ths (1"), 10ths (1/10")	1"	1/16"	Rigid	Silver	Printed	1/4"	0000000	000000

Certified Lightweight Aluminum Rulers

Inch, Left to Right

Ensure accurate measurements with these certified rulers. All include a calibration certificate stating they are made in accordance to NIST specifications and tolerances. They're an economical alternative to Certified Corrosion-Resistant Stainless Steel rulers.

Inch—Left to Right Reading Direction
Lg.	Front Graduation Marks (Numeric Increments)	Wd.	Thick.	Flexibility	Color	Graduation Mark Style	Hole Dia.		Each
Aluminum
12"	10ths (1"), 10ths (1/10")	1"	3/64"	Rigid	Silver	Printed	1/4"	0000000	000000
24"	10ths (1"), 10ths (1/10")	1"	3/64"	Rigid	Silver	Printed	1/4"	0000000	00000
36"	10ths (1"), 10ths (1/10")	1"	3/64"	Rigid	Silver	Printed	1/4"	0000000	00000
48"	10ths (1"), 10ths (1/10")	1"	1/16"	Rigid	Silver	Printed	1/4"	0000000	00000
60"	10ths (1"), 10ths (1/10")	1"	1/16"	Rigid	Silver	Printed	1/4"	0000000	00000
72"	10ths (1"), 10ths (1/10")	1"	1/16"	Rigid	Silver	Printed	1/4"	0000000	00000
96"	10ths (1"), 10ths (1/10")	1"	1/16"	Rigid	Silver	Printed	1/4"	0000000	00000
120"	10ths (1"), 10ths (1/10")	1"	1/16"	Rigid	Silver	Printed	1/4"	0000000	000000

Easy-to-Read High-Contrast Rulers

Inch, Left to Right

Numbers and graduations etched in light colors are easy to see on a black background. Inch rulers labeled with numeric increments that are less than 1" are quick reading.

Stainless steel rulers are more corrosion resistant than aluminum rulers.

Flexible rulers are for measuring slightly curved surfaces.

Stainless Steel

Inch—Left to Right Reading Direction
Lg.	Front Graduation Marks (Numeric Increments)	Back Graduation Marks (Numeric Increments)	Wd.	Thick.	Flexibility	Color	Graduation Mark Style		Each
6"	32nds (4/32"), 64ths (8/64")	100ths (1/10"), 10ths (1/10")	1/2"	1/64"	Flexible	Black	Etched	0000000	000000
6"	32nds (4/32"), 64ths (8/64")	100ths (1/10"), 10ths (1/10")	3/4"	1/32"	Rigid	Black	Etched	00000000	00000
12"	32nds (4/32"), 64ths (8/64")	100ths (1/10"), 10ths (1/10")	1/2"	1/64"	Flexible	Black	Etched	0000000	00000
12"	32nds (4/32"), 64ths (8/64")	100ths (1/10"), 10ths (1/10")	1"	1/32"	Rigid	Black	Etched	00000000	00000
18"	32nds (4/32"), 64ths (8/64")	100ths (1/10"), 10ths (1/10")	3/4"	1/64"	Flexible	Black	Etched	0000000	00000
18"	32nds (4/32"), 64ths (8/64")	100ths (1/10"), 10ths (1/10")	1 3/16"	1/32"	Rigid	Black	Etched	00000000	00000
24"	32nds (4/32"), 64ths (8/64")	100ths (1/10"), 10ths (1/10")	3/4"	1/64"	Flexible	Black	Etched	0000000	00000
24"	32nds (4/32"), 64ths (8/64")	100ths (1/10"), 10ths (1/10")	1 3/16"	1/32"	Rigid	Black	Etched	00000000	00000

Transparent Rulers

Keep your workpiece in view as you measure with these see-through rulers.

Style C is flexible for measuring slightly curved surfaces. It's labeled with numeric increments that are less than 1" for quick reading.

Inch/Metric—Left to Right Reading Direction
	Lg.	Front Graduation Marks (Numeric Increments)	Wd.	Thick.	Flexibility	Color	Graduation Mark Style		Each
Plastic
C	6"/150 mm	32nds (4/32"), 1/2 mm (10 mm), 100ths (1/10")	1 1/2"	0.007"	Flexible	Clear	Printed	00000000	00000

Corrosion-Resistant Stainless Steel Rulers

Inch

Made to last, our most corrosion-resistant rulers are stainless steel and have wear-resistant etched markings. Inch rulers labeled with numeric increments that are less than 1" are quick reading.

Flexible rulers are for measuring slightly curved surfaces.

Inch—Left to Right Reading Direction
Lg.	Front Graduation Marks (Numeric Increments)	Back Graduation Marks (Numeric Increments)	Wd.	Thick.	Flexibility	Color	Graduation Mark Style		Each
Stainless Steel
6"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	15/32"	1/64"	Flexible	Silver	Etched	0000000	00000
12"	32nds (4/32"), 64ths (8/64")	10ths (1/10"), 100ths (1/10")	15/32"	1/64"	Flexible	Silver	Etched	0000000	00000