Inspectors | McMaster-Carr

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REACH

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

DFARS Specialty Metals

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Accuracy Certificate Traceable to NIST

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Plug Gauge Size

Gauge Measurement Type

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Size-Checking Gauge Class

Specifications Met

Hardness

Width

Thread Size

Height

Surface Smoothness, RMS

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UN/UNF (SAE Straight)

Pipe Size

Finish

Gauge Size

8,177 Products

Measuring and Inspecting

Coordinate Measuring Machine Plates and Fixtures

Raise workpieces and position them on a fixture plate

126 products

Plug Gauges

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

1,022 products

Bore Gauges

Insert into a hole and expand the contacts to measure diameter

120 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

Threaded Hole Location Gauges

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

70 products

Bore Gauge Calibrators

Set and check the accuracy of two-point bore gauges

1 product

Height Gauges

Measure an object's height and mark workpieces for machining

49 products

Surface Plates

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

51 products

Chamfer Gauges

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

21 products

Inside/Outside Diameter Gauges

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

2 products

Calibration Squares

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

2 products

Grind Gauges

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

5 products

Squareness Gauges

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

3 products

Variance Indicator Clamps

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

61 products

Welding Gauges

Check alignment, corner dimensions, and other weld measurements

3 products

Countersink Gauges

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

19 products

Bore Gauge Heads

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

19 products

Coordinate Measurement Machine Probes

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

50 products

Height Gauge Calibrators

Ensure height gauges are accurate

11 products

Magnifiers

Workstation, hand-held, headband, and eyeglass magnifiers

195 products

Inspection Mirrors

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

94 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

41 products

Flaw-Detecting Dyes

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

7 products

Inspection Cameras

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

3 products

Microscope Eyepiece Cameras

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

1 product

Magnetic Yokes

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

5 products

Magnetic Particle Flaw Detection Kits

Everything you need to detect imperfections on or below metal surfaces

2 products

Machine Vision Cameras

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

17 products

Machine Vision Lights

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

49 products

Tamper-Evident Paint

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

12 products

Magnetic Particles

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

6 products

Optical Comparators

Magnify your part to check for dimensional accuracy and surface defects

13 products

Equipment Monitoring Cameras

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

2 products

Ultraviolet Inspection Lights

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

12 products

Test Leads

Pair with electrical testers such as multimeters to analyze your devices

41 products

Spring Test Probes

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

79 products

Motor Phase Sequence Testers

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

1 product

Multimeters

Take current, voltage, resistance, and other electrical measurements

109 products

Oscilloscope/Multimeters

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

4 products

Oscilloscopes

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

1 product

Electronic-Component Testers

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

4 products

Test Lead Tips

Adapt Fluke test leads to perform electrical tests in tight spaces

1 product

Spring Test Probe Sockets

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

23 products

Multimeter Hangers

Free up your hands when using a Fluke multimeter

1 product

Voltage Meters

Measure voltage in electrical components

7 products

Multimeter Line Splitters

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

1 product

Electrical Outlet Testers

Confirm proper wiring by checking for open circuits

2 products

Test Lead Sensors

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

2 products

Circuit Tracers

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

2 products

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

Current Detectors

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

1 product

Insulation Testers

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

9 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

Test Lead Adapters

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

6 products

Power Consumption Meters

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

1 product

Test Lead Clips

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

77 products

Electrical Resistance Meters

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

4 products

Decade Boxes

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

3 products

Line Break Detectors

Check for continuity in circuits

7 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

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

Levels

Ensure surfaces are completely horizontal or vertical

187 products

Inspection V-Blocks

Cradle rods and other round workpieces for precision measuring or inspecting

10 products

Laser Levels

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

22 products

Level Vials

Replace vials in levels or equipment

16 products

Alignment Lasers

Project a dot, line, or crosshair line as a reference point to position equipment

61 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

Level Mounts

Strap to nonmagnetic surfaces to attach a magnetic level

2 products

Force Gauges

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

133 products

Torque Gauges

Test the accuracy of torque wrenches and screwdrivers

88 products

Surface Roughness Testers

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

8 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

12 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

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

Stroboscopes

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

23 products

Fuel Injection Pressure Testers

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

1 product

Leak-Detecting Dyes

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

30 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

Building and Machinery Hardware

Lockouts

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

266 products

Lockout Procedure Stations

Store all of your lockout safety procedure forms in one place

4 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

Positioning Arms

Mount and position tools and other small equipment

70 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

Fluid Handling

Sights

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

243 products

Flow Sights

Visually confirm flow and inspect liquid color and clarity

154 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

Communication

Tags

Hang throughout facilities to convey information

639 products

Labels

Stick onto items to identify or convey information about them

175 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

Fabricating and Machining

Tooling Balls

Create a physical reference point for aligning workpieces in fixturing

52 products

Setup Blocks

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

31 products

V-Blocks

Hold round workpieces

72 products

Fixture Squares

Build different fixtures on multiple sides of the same block

38 products

Angle Plates

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

64 products

Parallels

Raise workpieces above your vise to create clearance for cutting tools

92 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

Multitools

A variety of tools and blades all in one

3 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

Lighting

Flashlights

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

134 products

Fiber-Optic Flashlight Cable

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

1 product

Flashlight Magnifiers

Turn your flashlight into an illuminated magnifying glass

4 products

Headlamps

Keep your hands free by wearing a flashlight on your head

28 products

Portable Work Lights

Bring lighting to poorly lit or completely dark areas

166 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

196 products

Portable Work Light Mounts

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

1 product

Light Transmitters

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

18 products

Neck Lights

Wear a flashlight around your neck to keep your hands free

2 products

Workstation Lights

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

56 products

Electrical Power, Networking, and Controlling

Binding Posts

Test circuits before making permanent connections

13 products

Wire Splices

Connect wires end to end to extend or repair a run

22 products

Electrical Enclosure Inspection Windows

View components without exposing them to dust and moisture

35 products

Monitoring Relays

Trip circuits or sound an alarm when voltage, current, or other limits are exceeded

31 products

Heating, Ventilation, and Air Conditioning

Duct Access Panels

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

41 products

Duct

Pair with fittings and accessories to convey and control airflow

12 products

Safety Equipment

Hot Stick Heads

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

10 products

Arm Sleeves

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

1 product

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 and Boot Covers

Keep footwear clean and dry and avoid contaminating sterile environments

17 products

Gloves

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

19 products

Hoods

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

7 products

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

Radiation Dose Meters

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

3 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

Material Handling

Forklift Fork Level Indicators

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

1 product

Conveyors

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

18 products

Facility and Grounds Maintenance

Paint

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

1 product

Fastening and Joining

Rivet Nut Tools

Install rivet nuts

1 product