Precision Measuring Tools | McMaster-Carr

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4,148 Products

Measuring and Inspecting

Precision Measuring Tool Kits

Precision Measuring Tool Kits

Multiple precision measuring tools in one convenient case

Variance Indicators

Variance Indicators

Identify small dimensional differences when checking part quality and alignment

Outside Micrometers

Outside Micrometers

Apply even pressure to objects to measure thickness more precisely than thickness gauges

Calipers

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

Rulers

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

Ring Gauges

Confirm your workpiece's outer diameter or external threads are within tolerance

Plug Gauges

Verify the diameter or threads of machined holes in finished parts; also called pin gauges

Flatness Gauges

Flatness Gauges

Determine if the flatness of surface plates, lapping plates, and other surfaces is within tolerance

Go/No-Go Outside Diameter Gauges

Go/No-Go Outside Diameter Gauges

Snap on rods and shafts to check if their outside diameters are within tolerance

Bore Gauges

Insert into a hole and expand the contacts to measure diameter

Gauge Blocks

Confirm dies, fixtures, and other workpieces meet precise tolerances and calibrate measuring tools

Depth Gauges

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

Height Gauges

Measure an object's height and mark workpieces for machining

Combination Square Heads

Combination Square Heads

Attach combination square blades to form a combination square

Inside Hole Micrometers

Inside Hole Micrometers

Find the inside diameter of cylinders and rings

Tape Measures

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

Angle Indicators

Angle Indicators

Align pipe and other equipment by measuring angle, level, or tilt

Laser Measurers

Laser Measurers

Point the laser to determine the distance to objects up to 700 yards away

Protractors

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

Depth Micrometers

Depth Micrometers

Measure slots, counterbores, and other holes more precisely than depth gauges

Combination Square Blades

Combination Square Blades

Connect to a combination square head to create a combination square

Squares

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

Inside Hole Calipers

Inside Hole Calipers

Measure hard-to-reach areas, such as internal grooves and slots

Thickness Gauges

Thickness Gauges

Move the thumb lever to quickly check the thickness of flat stock, pipe, or tubing

Micrometer Heads

Micrometer Heads

Mount on jigs, fixtures, and machine tools to position equipment and measure length

Machine Tool Indicators

Machine Tool Indicators

Find the exact edge of a workpiece without math or guesswork to quickly align your machining setup

Calibration Squares

Calibration Squares

Lay horizontally or vertically on CNC machines to check the position of tools with high precision

Micrometer Speeder Knobs

Micrometer Speeder Knobs

Color code micrometers by calibration date, precision, or other criteria

Threaded Hole Location Gauges

Threaded Hole Location Gauges

Pinpoint the true center of threaded holes to precisely align and measure parts

Squareness Gauges

Squareness Gauges

Check frames and machined parts to see if they are leaning or uneven

Grind Gauges

Measure how smoothly paint, coatings, and other mixtures are blended

Micrometer Mounting Brackets

Micrometer Mounting Brackets

Mount a micrometer head to your jig or fixture to accurately position workpieces

Levels

Ensure surfaces are completely horizontal or vertical

Laser Levels

Project level references onto surfaces when installing drop ceilings, pipe, or conveyors

Shaft Alignment Kits

Shaft Alignment Kits

Confirm that shafts are aligned or measure the degree of their misalignment

Level Mounts

Strap to nonmagnetic surfaces to attach a magnetic level

Center Finders

Line up your drill with the center of round bars and pipe

Edge Finders

Locate edges, shoulders, center points, and lines on workpieces in milling machines

Straightedges

Draw straight lines and check the straightness of surfaces

Force Gauges

Test objects to see how much tension and compression force they can bear

Torque Gauges

Test the accuracy of torque wrenches and screwdrivers

Torque Sensors

Convert manually applied torque into an electrical signal that you can measure and record

Hardness Testers

Hardness Testers

Determine the Rockwell, Brinell, or Durometer hardness of any material

Hardness Calibration Test Blocks

Hardness Calibration Test Blocks

Confirm testers are accurate for a specific Rockwell or Brinell hardness

Scales

Bench-top, hanging, floor, and conveyor scales

Test Weights

Place on or hang from your scale to calibrate it

Hardness Tester Indenters

Hardness Tester Indenters

Hard enough to make impressions on most metal to determine Brinell hardness

Tire Pressure Test Gauges

Tire Pressure Test Gauges

Calibrate the accuracy of tire pressure and tire inflation gauges

Fabricating and Machining

Setup Blocks

Use as mounting bases and supports to ensure accurate angles and spacing

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

Electrical

Development Board Sensor Modules

Development Board Sensor Modules

Transform your development board into everything from an airflow monitor to a motion detector

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