McMaster-Carr

Choose a Category

	System of Measurement System of Measurement

Inch

Metric

	Length Length

	Width Width

	Thickness Thickness

	Graduation Marks Graduation Marks

	Numeric Increments Numeric Increments

	Flexibility Flexibility

Flexible

Rigid

	Material Material

	Color Color

	Silver		Black
	White		Clear
	Gold		Yellow
	White and Yellow

	Reading Direction Reading Direction

Left to Right

Bottom to Top

Top to Bottom

	Graduation Mark Style Graduation Mark Style

Etched

Printed

	Graduation Color Graduation Color

	Black
	White
	Black and Red

	Orientation Orientation

Horizontal

Vertical

	Graduation Location Graduation Location

	Finish Finish

Satin Chrome

Titanium Nitride (TiN)
Coated

	Manufacturer Model Number Manufacturer Model Number

	Manufacturer Manufacturer

Starrett

Lufkin

Stanley

	Scale Type Scale Type

Engineers'

Architects'

	Tip Style Tip Style


Hook	Pointed Hook

Loop

	Certification Certification

NIST Calibration Certificate

NIST Calibration Certificate
with Test Data

	Number of Segments Number of Segments

	Shape Shape

Triangle

Flat

	Blade Length Blade Length

12"

18"

24"

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159 Products

Dimensional Measuring

Starrett High-Accuracy Rulers

Also known as machinists’ rules, these rulers ensure reliable, repeatable measurements.

Starrett Certified
High-Accuracy Rulers

Ensure reliable, repeatable measurements with these rulers.

High-Accuracy Rulers

An economical alternative to Starrett High-Accuracy Rulers, these provide reliable, repeatable measurements.

Certified High-Accuracy Rulers

These rulers include a certificate of calibration traceable to NIST with test measurements that confirm accuracy.

Scratch-Resistant
High-Accuracy Rulers

Protect your ruler from scratches and wear with a TiN (titanium nitride) coating.

Easy-to-Read High-Contrast Rulers

Numbers and graduations etched in light colors are easy to see on a black background.

Corrosion-Resistant
Stainless Steel Rulers

Made to last, our most corrosion-resistant rulers are stainless steel and have wear-resistant etched markings.

Certified Corrosion-Resistant
Stainless Steel Rulers

A calibration certificate traceable to NIST with test measurements that confirm accuracy is included with these stainless steel rulers.

Lightweight Aluminum Rulers

Made of aluminum, these rulers are an economical alternative to stainless steel rulers.

Certified Lightweight Aluminum Rulers

Ensure accurate measurements with these certified rulers.

Transparent Rulers

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

Folding Rulers

Fold these rulers for convenient storage and transport.

Adhesive-Back Vertical Rulers

Permanently mount these rulers on machines, tanks, and walls to measure heights and depths.

Diameter Tape Measures

Also known as tree tapes, wrap these tape measures around circular items to determine diameter and measure circumference without the need for calculations.

Pocket Tape Measures with
Corrosion-Resistant Blade

The blade on these tape measures is chrome-plated for durability and corrosion resistance.

Lufkin Tape Measures

These tape measures have a chrome-plated, impact-resistant plastic case.

Stanley Heavy Duty
PowerLock Tape Measures

All have a durable cast metal case that’s chrome-plated for corrosion resistance

Lufkin High-Visibility Tape Measures

A bright orange case makes these tape measures easy to spot.

Digital Tape Measures

No need to squint at graduation marks with these tape measures—you can clearly read an accurate measurement on the digital display.

Easy-Carry Long Tape Measures

Hold on to the large, rubber-coated handle while carrying these tape measures.

Long-Length Tank-Level Rulers

Connect continuous segments to create a ruler up to 10 ft. long.

Combination Squares

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.

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.

High-Accuracy Combination
Square Blades

Blades are for use with High-Accuracy Combination Square Heads.

Straightedges and Drafting Rules

Architects’ and Engineers’ Scales

Take measurements off of scaled architectural or engineering drawings with these specialized scales.

Triangle Straightedges/Protractors

A protractor and triangle in one, use these tools to quickly set any angle from 0° to 90°.

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