Inspectors | McMaster-Carr

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How can we improve?

7,743 Products

Measuring and Inspecting

Coordinate Measuring Machine Plates and Fixtures

Raise workpieces and position them on a fixture plate

126 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

108 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

Surface Plate Stands

Hold up surface plates at precise support points to maintain accuracy

16 products

Height Gauges

Measure an object's height and mark workpieces for machining

34 products

Height Gauge Calibrators

Ensure height gauges are accurate

3 products

Surface Plates

Extremely flat to give an accurate reference plane for layout and inspection work

51 products

Plug Gauges

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

1,026 products

Chamfer Gauges

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

21 products

Calibration Squares

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

2 products

Inside/Outside Diameter Gauges

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

2 products

Threaded Hole Location Gauges

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

70 products

Welding Gauges

Check alignment, corner dimensions, and other weld measurements

3 products

Variance Indicator Clamps

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

61 products

Squareness Gauges

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

3 products

Countersink Gauges

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

22 products

Grind Gauges

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

4 products

Coordinate Measurement Machine Probes

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

24 products

Magnifiers

Workstation, hand-held, headband, and eyeglass magnifiers

169 products

Inspection Mirrors

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

69 products

Borescopes

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

14 products

Microscopes

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

18 products

Machine Vision Cameras

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

17 products

Tamper-Evident Paint

Cracks from movement when dried on equipment to indicate vibration or tampering

12 products

Optical Comparators

Magnify your part to check for dimensional accuracy and surface defects

4 products

Flaw-Detecting Dyes

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

2 products

Inspection Cameras

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

2 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

Magnetic Yokes

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

2 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

36 products

Multimeter Hangers

Free up your hands when using a Fluke multimeter

1 product

Multimeter Line Splitters

Use with a multimeter to determine current usage of devices without pulling apart their wires

1 product

Multimeters

Take current, voltage, resistance, and other electrical measurements

109 products

Motor Phase Sequence Testers

Analyze a motor's rotation and electrical system to confirm proper wiring

1 product

Spring Test Probes

Use in spring test probe sockets to test for continuity and damaged components in circuit boards

79 products

Spring Test Probe Sockets

Pair with spring test probes to test for continuity and damaged components in circuit boards

23 products

Oscilloscopes

Analyze problems with electrical equipment by graphing voltage and other electrical waveforms

1 product

Test Lead Tips

Adapt Fluke test leads to perform electrical tests in tight spaces

1 product

Test Leads

Pair with electrical testers such as multimeters to analyze your devices

41 products

Test Lead Adapters

Change tip styles to take different measurements with the same test leads

6 products

Test Lead Sensors

Adapt Fluke multimeters to take temperature readings, so you don't need a separate meter

2 products

Test Lead Clips

For hands-free testing, create a temporary yet secure electrical connection

77 products

Test Lead Wire

Add your own clips, tips, and adapters to link electrical testers to the units you're checking

4 products

Circuit Breaker Identifiers

Determine which circuit breaker is connected to an electrical receptacle

4 products

Voltage Meters

Measure voltage in electrical components

7 products

Current Detectors

Check for AC current and voltage without making direct contact with wire

1 product

Oscilloscope/Multimeters

Perform electrical tests, record data, and view a graph of electrical waveforms

4 products

Decade Boxes

Test and troubleshoot circuits without needing to solder capacitors or replace resistors

3 products

Electrical Outlet Testers

Confirm proper wiring by checking for open circuits

2 products

Line Break Detectors

Check for continuity in circuits

7 products

Patch Cords

Make point-to-point connections between electrical testing equipment and your devices

12 products

BNC Test Cords

Connect oscilloscopes and other testers to your equipment

4 products

Power Consumption Meters

Measure the amount of power your devices consume to help calculate energy costs

1 product

Electrical Panel Meters

See the amount of electricity used to run motors, generators, and other equipment

84 products

Voltage Detectors

Check for voltage in receptacles, cables, and electrical components

13 products

Circuit Tracers

Locate cables behind walls, check for continuity, and identify circuit breakers

2 products

Power Consumption Data Loggers

Record data to monitor energy usage and fix intermittent problems, such as voltage spikes

4 products

Current Meters

Measure current without interrupting the circuit

3 products

Electrical Resistance Meters

Prevent damage to electronics by checking that surfaces won't discharge static electricity

4 products

Insulation Testers

Measure insulation quality in motors, generators, and other electrical equipment

9 products

Electronic-Component Testers

Test, identify, and troubleshoot components such as circuit boards and diodes

4 products

Levels

Ensure surfaces are completely horizontal or vertical

189 products

Inspection V-Blocks

Cradle rods and other round workpieces for precision measuring or inspecting

10 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

Laser Levels

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

23 products

Alignment Lasers

Project a line or dot as a reference point to ensure equipment is properly positioned

37 products

Level Mounts

Strap to nonmagnetic surfaces to attach a magnetic level

2 products

Level Vials

Replace vials in levels or equipment

17 products

Force Gauges

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

117 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

30 products

Torque Gauges

Test the accuracy of torque wrenches and screwdrivers

80 products

Magnetic Field Indicators

Measure the strength of a magnetic field in gauss

11 products

Surface Roughness Testers

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

1 product

Gloss Meters

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

2 products

Light Meters

Measure light quality and intensity

20 products

Tachometers

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

1 product

Stethoscopes

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

7 products

Hour Meters

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

51 products

Stroboscopes

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

13 products

Inspection Indicators

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

4 products

Leak-Detecting Dyes

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

30 products

Radiation Detectors

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

5 products

Fuel Injection Pressure Testers

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

1 product

Fabricating and Machining

Tooling Balls

Create a physical reference point for aligning workpieces in fixturing

52 products

Angle Plates

Ensure accurate right angles and hold workpieces and fixtures perpendicular to your machine table

64 products

Setup Blocks

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

31 products

Fixture Squares

Build different fixtures on multiple sides of the same block

31 products

V-Blocks

Hold round workpieces

61 products

Fixture Tables

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

2 products

Sine Plates

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

4 products

Parallels

Raise workpieces above your vise to create clearance for cutting tools

92 products

Magnetic Retrievers

Pick up screws, nuts, and other small magnetic objects

41 products

Retrievers

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

1 product

Multitools

A variety of tools and blades all in one

3 products

Communication

Labels

Stick onto items to identify or convey information about them

175 products

Tags

Hang throughout facilities to convey information

468 products

Bluetooth Tags

Track the location of equipment, tools, and other material around your facility

2 products

Tamper-Evident Seals

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

84 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

609 products

Signs

Everything from accident prevention to traffic control to exit signs

22 products

Fluid Handling

Sights

Observe and monitor the contents of pipes, tanks, and other containers

231 products

Flow Sights

Visually confirm flow and inspect liquid color and clarity

152 products

Flow Transmitters

Send flow rate measurements to PLCs, data loggers, and remote displays

84 products

Hose and Hose Fittings

Flexible and stronger than tubing; often used to convey liquids and gases under pressure

2 products

Building and Machinery Hardware

Positioning Arms

Mount and position tools, small electronics, and displays

70 products

Access Panels

Install in ceilings, walls, concrete floors, and tanks to access and inspect inside

167 products

Roof Hatches

Access the roof from inside your building

7 products

Lockout Procedure Stations

Store all of your lockout safety procedure forms in one place

4 products

Lockouts

Ensure that machines stay turned off to prevent accidents during maintenance work

266 products

Key-Control Cabinets

Lock and keep track of keys in a central location

23 products

Key Racks

Store and quickly identify keys with color-coded and labeled tags

2 products

Electrical

Electrical Enclosure Inspection Windows

View components without exposing them to dust and moisture

35 products

Binding Posts

Test circuits before making permanent connections

14 products

Relays

Electrically open and close circuits to control power to lights, motors, and other equipment

5 products

Wire Splices

Connect wires end to end to extend or repair a run

22 products

Lighting

Flashlights

Direct a beam of light to precisely where it’s needed

126 products

Flashlight Magnifiers

Turn your flashlight into an illuminated magnifying glass

3 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 and Task Lights

Shine light on work areas, within enclosures, and inside machines

70 products

Portable Work Lights

Bring lighting to poorly lit or completely dark areas

147 products

Headlamps

Keep your hands free by wearing a flashlight on your head

30 products

Portable Work Light Mounts

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

1 product

Material Handling

Conveyors

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

3 products

Forklift Fork Level Indicators

Mount to your forklift's mast to check if forks are level from the driver's seat

1 product

Safety Equipment

Gloves

Shield your hands from cuts, heat, cold, chemical splashes, and electrical and welding sparks

19 products

Welding Lens Magnifiers

Attach to welding lenses to enhance details

8 products

Coveralls

Shield your full body against dirt, rain, heat, chemical splashes, and electrical and welding sparks

4 products

Shoe Covers

Keep shoes clean and dry and avoid contaminating sterile environments

17 products

Hoods

Shield your head and neck from dirt, heat, cold, and electrical and welding sparks

7 products

Arm Sleeves

Protect your arms from cuts, sparks, heat, and chemical splashes

1 product

Hair Covers

Catch stray hairs before they contaminate food

2 products

Jackets

Thicker than shirts for extra protection against dirt, rain, cold, chemical splashes, and sparks

3 products

Hot Stick Heads

Swap out the head on your hot stick to operate switches, pull cotter pins, and more

10 products

Containers, Storage, and Furniture

Multimeter Cases

Store and carry multimeters

9 products

Test Lead Holders

Keep test leads organized and within reach

3 products

Facility and Grounds Maintenance

Paint

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

1 product

Heating, Ventilation, and Air Conditioning

Duct

Pair with fittings and accessories to convey and control airflow

12 products

Duct Access Panels

Create an entry point for cleaning and inspecting duct; also known as cleanouts

41 products

Fastening and Joining

Rivet Nut Tools

Install rivet nuts

1 product