Rulers | McMaster-Carr

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1,558 Products

Measuring and Inspecting

Rulers

Horizontal, vertical, circumference, center-finding, and pica rulers

Tape Measures

Standard, long, center-finding, and flexible tape measures

Squares

Check 90° angles during layout work with combination, angle, or pipefitters' squares

Staff Gauges

Typically mounted to walls and tanks for measuring the level of liquids, such as water, fuel, and oil

Tap and Drill Chart/Rulers

Tap and Drill Chart/Rulers

Reference tap and drill sizes, measure in inches, and convert to decimals with one tool

Combination Square Blades

Combination Square Blades

Connect to a combination square head to create a combination square

Depth Gauges

Reach into slots, counterbores, and other holes to measure depth

Protractors

Set bevels and measure angles with everything from pocket-size to long-arm protractors

Calipers

Take inside, outside, and depth measurements with more precision than a ruler

Diameter Identifiers

Diameter Identifiers

Tighten the strap around rods, drill bits, and other small items to measure outer diameter

Diameter Tape Measures

Diameter Tape Measures

Wrap around circular items to measure diameter and circumference without calculating

Pipe Size Chart/Rulers

Pipe Size Chart/Rulers

Curl around pipe to gauge its size, measure its diameter, or mark lines

Linear Scales

Measure and display the position of tools on machines, such as lathes, saws, and drill presses

Combination Square Heads

Combination Square Heads

Attach combination square blades to form a combination square

Map Distance Measuring Tools

Map Distance Measuring Tools

Slide across maps and blueprints to measure distances

Liquid-Level Tape Measures

Liquid-Level Tape Measures

Lower into deep containers, such as tanks, to check the level of oil and other fluids

Straightedge/Protractors

Straightedge/Protractors

Draw straight lines and measure angle, slope, and rise with one tool

Parallel Rules

Draw parallel lines, as well as circles, arcs, and angles

Angle Transfers

Angle Transfers

Duplicate any angle in construction and other applications

Drafting Curves

Drafting Curves

Use as templates for drawing curved lines

Magnifiers

Workstation, hand-held, headband, and eyeglass magnifiers

Leveling Rods

Use with sight levels to estimate the distance between you and a given object

Levels

Ensure surfaces are completely horizontal or vertical

Fabricating and Machining

Multitools

A variety of tools and blades all in one

Containers, Storage, and Furniture

Tape Measure Holders

Tape Measure Holders

Keep tape measures close at hand

Fastening and Joining

Tungsten Electrode Stick-Out Gauges

Tungsten Electrode Stick-Out Gauges

Measure the distance tungsten electrodes stick out from your nozzle for consistent TIG welding

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)