Inspection Tools | McMaster-Carr

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Accuracy Certificate Traceable to NIST

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Gauge Measurement Type

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Size-Checking Gauge Class

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Surface Smoothness, RMS

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5,984 Products

Most Likely Products

Tags

Hang throughout facilities to convey information

201 products

Welding Gauges

Check alignment, corner dimensions, and other weld measurements

3 products

Magnifiers

Workstation, hand-held, headband, and eyeglass magnifiers

168 products

Cameras

Capture pictures and video, and then transfer them to your PC or the web

1 product

Inspection Mirrors

Reach around corners and obstructions to inspect hard-to-see areas

94 products

All Results

Measuring and Inspecting

Welding Gauges

Check alignment, corner dimensions, and other weld measurements

3 products

Bore Gauge Calibrators

Set and check the accuracy of two-point bore gauges

1 product

Bore Gauges

Insert into a hole and expand the contacts to measure diameter

120 products

Bore Gauge Heads

Swap the head on your Mitutoyo electronic bore gauge for one with a different measuring range

19 products

Gauge Blocks

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

738 products

Plug Gauges

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

1,022 products

Height Gauges

Measure an object's height and mark workpieces for machining

51 products

Height Gauge Calibrators

Ensure height gauges are accurate

11 products

Countersink Gauges

Catch sizing errors in countersunk holes to keep fasteners from protruding and creating weak points

20 products

Variance Indicators

Identify small dimensional differences when checking part quality and alignment

4 products

Variance Indicator Clamps

Secure and position indicators, arms, and other components on holders

45 products

Coordinate Measuring Machine Plates and Fixtures

Raise workpieces and position them on a fixture plate

126 products

Threaded Hole Location Gauges

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

70 products

Chamfer Gauges

Check the diameter of chamfered edges to make sure they're within tolerance

21 products

Machine Tool Indicators

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

6 products

Bench Centers

Inspect cylindrical parts for irregularities that could cause wobbles or vibrations

5 products

Coordinate Measurement Machine Probes

Take 3D measurements of workpieces on your CMM or CNC machine to inspect for quality

24 products

Calibration Squares

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

2 products

Squareness Gauges

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

3 products

Grind Gauges

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

5 products

Inside/Outside Diameter Gauges

Mount your variance indicator to measure the diameter of rims, grooves, and shallow holes

2 products

Magnifiers

Workstation, hand-held, headband, and eyeglass magnifiers

168 products

Cameras

Capture pictures and video, and then transfer them to your PC or the web

1 product

Inspection Mirrors

Reach around corners and obstructions to inspect hard-to-see areas

94 products

Microscopes

Enlarge the view of small parts and samples for inspection and assembly

41 products

Monoculars

Magnify still objects from far away to view features you couldn't see with the naked eye

2 products

Borescopes

Insert the camera into hard-to-reach areas to view them from your smart device or the display

14 products

Optical Comparators

Magnify your part to check for dimensional accuracy and surface defects

19 products

Microscope Eyepiece Cameras

Place over your microscope's eyepiece to view a live feed of extra-fine details

1 product

Ultraviolet Inspection Lights

Shine on equipment to detect traces left behind by leaks, rodents, and other contaminants

12 products

Magnetic Particles

Apply to metal and magnetize with a yoke to show defects on and below the surface

6 products

Magnetic Particle Flaw Detection Kits

Everything you need to detect imperfections on or below metal surfaces

2 products

Binoculars

Track moving objects and scan wide areas from far away

1 product

Flaw-Detecting Dyes

Reveal cracks and surface flaws using colored dye under natural or UV light

7 products

Machine Vision Cameras

Inspect objects on conveyor lines for defects such as surface flaws and missing screws

17 products

Magnetic Yokes

Pair with magnetic particles to find defects on or below metal surfaces

5 products

Inspection Cameras

Reach into tight and hard-to-access spots and stream the inspection on your phone or tablet

3 products

Equipment Monitoring Cameras

Place inside machines to keep an eye on harsh industrial processes from a safe distance

2 products

Machine Vision Lights

Illuminate an object so your machine vision camera can capture detailed images for inspection

49 products

Inspection Indicators

Mount to your equipment for a signal when it's time for maintenance or inspection

4 products

Hour Meters

Display running time on a machine so you can schedule preventative maintenance

51 products

Inspection Parallels

Line up workpieces for precise machining, or support them at a level height for inspecting

8 products

Inspection Setup Blocks

Line up workpieces at precise heights and angles for machining, measuring, and inspecting

2 products

Inspection V-Blocks

Cradle rods and other round workpieces for precision measuring or inspecting

10 products

Shaft Alignment Kits

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

9 products

Pipe Flange Aligners

Line up flange holes so they bolt securely and connections won’t leak

21 products

Tachometers

Measure the speed of rotating parts on machines such as shafts, gears, and belts

1 product

Combustion Analyzers

Measure boiler and furnace combustion efficiency

3 products

Vibration Monitors

Mount to your machine to continuously monitor vibration and ensure it stays within the proper range

16 products

Vibration Meters

Spot-check vibration to gauge the health of your machine

8 products

Stroboscopes

Shine a bright flashing light at moving belts and pulleys to measure speed and detect wear

23 products

Passivation Testers

Detect iron in stainless steel parts to confirm they're properly passivated

1 product

Hardness Testers

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

38 products

Magnetic Field Indicators

Measure the strength of a magnetic field in gauss

1 product

Surface Roughness Testers

Trace the surface of a part to calculate its roughness parameters in Ra, Rp, and Rq

8 products

Torque Gauges

Test the accuracy of torque wrenches and screwdrivers

88 products

Compression Testers

Check engine compression to maintain top performance

9 products

Leak-Detecting Dyes

Bright colors help you spot leaks in water and hydraulic systems without using ultraviolet light

30 products

Smoke Pens

Produce smoke to observe airflow and detect leaks in HVAC systems; reusable, unlike smoke candles

2 products

Gas Leak Detectors

Find gas leaks in pipes, tubes, fittings, tanks, cylinders, and valves

23 products

Stethoscopes

Detect internal mechanical problems like worn parts, excessive vibration, and fluid leaks

8 products

Radiation Detectors

Test for radiation, even in low amounts or from microwave ovens

6 products

Smoke Candles

Light the wick for a short burst of smoke to observe airflow and detect leaks in HVAC systems

4 products

Force Gauges

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

133 products

Smoke Pellets

Detect airflow and leaks in HVAC systems near server rooms and other areas with electronics

4 products

Smoke Powder

No flame needed—release a burst of powder to detect airflow and leaks in HVAC systems

3 products

Gloss Meters

Measure the gloss of paint, coatings, and surfaces to ensure each product is as shiny as the last

2 products

Fuel Injection Pressure Testers

Check fuel injection pressure to maintain your car's gas mileage

1 product

Communication

Tags

Hang throughout facilities to convey information

201 products

Labels

Stick onto items to identify or convey information about them

142 products

Tamper-Evident Seals

Secure hasps, latches, and other connections to visibly indicate tampering

8 products

Fire Hydrant Markers

Label fire hydrants to indicate their flow rate or status

4 products

Stamps

Mark surfaces such as metal, cardboard, paper, or fabric with indentations or ink

1,084 products

Fabricating and Machining

Retrievers

Grab and pull objects out of hard-to-reach spots

1 product

Parallels

Raise workpieces above your vise to create clearance for cutting tools

92 products

Setup Blocks

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

31 products

Tooling Balls

Create a physical reference point for aligning workpieces in fixturing

52 products

V-Blocks

Hold round workpieces

72 products

Fixture Tables

Add clamps, brackets, and other components to build fixtures for welding and assembly

2 products

Vises

Secure workpieces in place

2 products

Sine Plates

Use with gauge blocks to measure angles on your workpiece or set up a part for precision grinding

4 products

Magnetic Retrievers

Pick up screws, nuts, and other small magnetic objects

3 products

Lighters

Light flames and recharge for repeated long-term use

1 product

Ultraviolet Curing Lamps

Cure adhesives and sealants, inspect parts for quality, or detect leaks

7 products

Multitools

A variety of tools and blades all in one

3 products

Safety Equipment

Bump Caps

Guard against minor head bumps and scrapes

1 product

Welding Helmets

Guard against scratches and weld spatter better than face shields

1 product

Hats

Shield your head from sun, rain, cold, and sparks

2 products

Welding Lens Magnifiers

Attach to welding lenses to enhance details

8 products

Respirator Filter Monitors

Track the quality of incoming air as it travels from your air line to your respirator

6 products

Multi-Gas Detectors

Monitor air for carbon monoxide and combustible gases including methane, hydrogen, and propane

7 products

Oxygen Detectors

Too much or too little oxygen triggers alarms and warning lights

3 products

Carbon Dioxide Meters

Measure and display real-time carbon dioxide levels for indoor ventilation quality

1 product

Carbon Monoxide Detectors

Alarms, lights, or color changes alert you to the presence of carbon monoxide

6 products

Hydrogen Sulfide Detectors

Alarms and lights alert you to high levels of hydrogen sulfide

6 products

Radiation Dose Meters

Attach to your pocket or nearby objects to track the accumulated radiation you've been exposed to

2 products

Facility and Grounds Maintenance

Paint

Renew, enhance, protect, and change the color of surfaces

1 product

Lighting

Flashlights

Direct a beam of light to where it’s needed or provide 360° of lighting

130 products

Flashlight Magnifiers

Turn your flashlight into an illuminated magnifying glass

4 products

Fiber-Optic Flashlight Cable

Shine light into hard-to-reach spaces by attaching to your flashlight

1 product

Light Transmitters

Light up small and hard-to-reach areas such as the inside of models, prototypes, and circuit boards

18 products

Light Pipes

Concentrate and direct light from the bulb on a circuit board to a display

16 products

Machine Lights

Shine light on machinery or into sights to view interior work processes

2 products

Portable Work Lights

Bring lighting to poorly lit or completely dark areas

142 products

Headlamps

Keep your hands free by wearing a flashlight on your head

28 products

Portable Work Light Mounts

A suction cup holds lights with a magnet to glass, aluminum, and other nonmagnetic surfaces

1 product

Neck Lights

Wear a flashlight around your neck to keep your hands free

1 product

Workstation Lights

Mount above your workspace to brighten your work and add light where ceiling lights can't reach

4 products

Enclosure Lights

Brighten enclosures and small spaces such as closets and drawers

4 products

Fastening and Joining

Rivet Nut Tools

Install rivet nuts

1 product

Electrical Power, Networking, and Controlling

Batteries

Household, button/coin cell, large-cell, and cordless tool batteries

1 product

Material Handling

Conveyors

Roller, skate wheel, ball transfer, belt, and vacuum conveyors

3 products