Metric Indicators | McMaster-Carr

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2,255 Products

Measuring and Inspecting

Variance Indicators

Identify small dimensional differences when checking part quality and alignment

104 products

Variance Indicator Lifting Levers

Replace the cap on your variance indicator to help lift the spindle

1 product

Variance Indicator Clamps

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

7 products

Thread Size Identifiers

Confirm your fastener's thread size, pitch, or threads per inch

20 products

Height Gauges

Measure an object's height and mark workpieces for machining

30 products

Calipers

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

174 products

Depth Gauges

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

25 products

Rulers

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

238 products

Outside Micrometers

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

107 products

Outside Micrometer Tips

Adapt your micrometer to measure curved and irregularly shaped objects, such as gear teeth and pipe

1 product

Variance Indicator Contact Points

Attach to your variance indicator to make contact with the workpiece being measured

12 products

Depth Micrometers

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

23 products

Inside Hole Calipers

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

12 products

Micrometer Heads

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

16 products

Thickness Gauges

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

14 products

Chamfer Gauges

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

9 products

Inside Hole Micrometers

Find the inside diameter of cylinders and rings

9 products

Bore Gauges

Insert into a hole and expand the contacts to measure diameter

39 products

Plug Gauges

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

185 products

Precision Measuring Tool Sets

Multiple precision measuring tools in one convenient case

7 products

Feeler Gauges

Check gaps and alignment between machine parts and other surfaces

105 products

Micrometer Check Gauges

Confirm your outside or depth micrometers are accurate

1 product

Staff Gauges

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

4 products

Calibration Rods

Check and set micrometers and other measuring tools

8 products

Liquid-Level Tape Measures

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

27 products

Squares

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

24 products

Combination Square Blades

Connect to a combination square head to create a combination square

2 products

Threaded Hole Location Gauges

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

31 products

Squareness Gauges

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

3 products

Step Gauges

Check step height, gap width, and distance between slots to make sure machine and engine parts align

2 products

Parallel Rules

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

1 product

Transfer Punches

Mark the center of an existing hole onto a separate workpiece

73 products

Straightedges

Draw straight lines and check the straightness of surfaces

3 products

Layout Compasses

Draw circles and transfer distance measurements

2 products

Position Indicators

Track components on rotating spindles or lead screws to help adjust machinery quickly and precisely

16 products

Counters

Record and display the number of times events or processes occur

2 products

Scales

Bench-top, hanging, floor, and conveyor scales

1 product

Chemistry Meters

Take water-chemistry measurements more precisely than test strips and swabs

2 products

Load Cells

Measure forces and send them to computers to monitor and trigger actions in machinery

15 products

Communication

Audible Alarms/Indicator Lights

Alert people with both light and sound

18 products

Indicator Lights

Call attention to hazards and changes in status with flashing, strobe, and other lights

16 products

Fabricating and Machining

3D Printer Probes

Map the ups and downs of print surfaces so printers extrude at the proper height

1 product

Fluid Handling

Noncontact Temperature Sensors

Monitor the temperature of hazardous, sensitive, and hard-to-reach materials without touching them

6 products

RTDs

Measure and transmit liquid, gas, and surface temperature more precisely than thermocouples

5 products

Sights

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

6 products

Differential Pressure Transmitters

Relay pressure changes in heating, cooling, and pumping systems to controllers and remote displays

3 products

Electrical

Sensor Switches

Detect moving objects from a distance, triggering a circuit to open or close

625 products

Electrical Sockets

Pair with plugs or receptacles to transmit power or data

1 product

Material Handling

Robot Tool Calibration Styli

Calibrate robot arm movement for precision in tasks such as attaching fasteners

1 product

Fastening and Joining

Torque Wrenches

Avoid overtightening and damaging fasteners by applying a specific torque

23 products

Washers

Nearly every size and shape imaginable, from flat washers to clipped to curved

15 products

Building and Machinery Hardware

Indicating Knobs

Control devices and view settings at a glance

6 products