Metric Tools | McMaster-Carr

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Aluminum Chromium Nitride (AlCrN) Coated

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11,122 Products

Most Likely Products

Tool Sets

Secure fasteners and complete a variety of other maintenance tasks

4 products

Outside Micrometers

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

107 products

Combination Wrenches

Use the open end when tightening in cramped spaces and the box end when you need extra grip

287 products

L-Keys

Turn fasteners from either end and reach into tight spots

326 products

All Results

Facility and Grounds Maintenance

Tool Sets

Secure fasteners and complete a variety of other maintenance tasks

4 products

Fastening and Joining

Combination Wrenches

Use the open end when tightening in cramped spaces and the box end when you need extra grip

287 products

Bit Sockets

Turn fasteners with an internal drive style without slipping and damaging the drive

392 products

Sockets

Turn fasteners with an external drive style without slipping and damaging the drive

804 products

Box Wrenches

Grip all sides of a fastener to prevent slipping

86 products

Torque Wrenches

Avoid overtightening and damaging fasteners by applying a specific torque

193 products

Socket Wrenches

Apply torque to turn nuts, bolts, and other fasteners without rounding the heads

21 products

Impact Wrenches

Maximize torque to break frozen bolts free and drive fasteners more quickly than other wrenches

2 products

Spanner Wrenches

Grab onto holes and slots to turn collars, bearings, and other machine tool components

20 products

Open-End Wrenches

Tighten and loosen fasteners from the top or the side

195 products

Wrench Heads

Attach to your ratchet wrench and socket extension to turn fasteners where clearance is limited

47 products

L-Keys

Turn fasteners from either end and reach into tight spots

326 products

Nutdrivers

Tighten and loosen nuts and bolts

45 products

T-Handle Keys

To turn fasteners in hard-to-reach spots, there's a long shaft and a grip for your whole hand

181 products

Screwdrivers

Tighten and loosen screws

129 products

Impact Drivers

More powerful than drills to drive screws through dense material and loosen stuck fasteners

1 product

Nutdriver Bits

Pair with nutdrivers to turn hex nuts and cap screws

23 products

Screwdriver Bits

Pair with drivers to turn screws

129 products

Threaded Stud and Rod Drivers

Hold and tighten threaded studs and rods

4 products

Torque Screwdrivers

Apply precise torque as you fasten screws to prevent overtightening

69 products

Push Nut Installation Tools

Press nuts and retaining rings onto threaded fasteners and shafts

Spring Plunger Drivers

Install spring plungers from the nose end without depressing the nose

7 products

Screw, Pipe, and Stud Extractors

Remove broken screws, pipes, and studs without damaging the threads around them

32 products

Threaded Insert Installation Tools

Install helical, key-locking, slotted-drive, and other threaded inserts

239 products

Press-Fit Nut Installation Tools

Everything you need to install press-fit nuts by hand

1 product

Threaded Inserts

Create new threads or repair stripped threads

1,228 products

Measuring and Inspecting

Outside Micrometers

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

107 products

Flatness Gauges

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

3 products

Ring Gauges

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

268 products

Plug Gauges

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

301 products

Tape Measures

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

78 products

Ring Gauge Holders

Keep ring gauges still to measure cylindrical parts or threads quickly and repeatedly

4 products

Plug Gauge Drivers

Test thread tolerance in seconds to save time during high-volume work

7 products

Thread Size Identifiers

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

20 products

Calipers

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

172 products

Precision Measuring Tool Sets

Multiple precision measuring tools in one convenient case

10 products

Feeler Gauges

Check gaps and alignment between machine parts and other surfaces

92 products

Inside Hole Calipers

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

12 products

Bore Gauges

Insert into a hole and expand the contacts to measure diameter

49 products

Depth Micrometers

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

23 products

Height Gauges

Measure an object's height and mark workpieces for machining

41 products

Depth Gauges

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

51 products

Rulers

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

238 products

Liquid-Level Tape Measures

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

27 products

Variance Indicators

Identify small dimensional differences when checking part quality and alignment

166 products

Thickness Gauges

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

14 products

Inside Hole Micrometers

Find the inside diameter of cylinders and rings

9 products

Squares

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

22 products

Linear Scales

Measure and display the position of tools on machines, such as lathes, saws, and drill presses

30 products

Laser Measurers

Point the laser to determine the distance to objects up to hundreds of feet away

11 products

Measuring Wheels

Roll along surfaces to measure distance

8 products

Combination Square Blades

Connect to a combination square head to create a combination square

2 products

Map Distance Measuring Tools

Slide across maps and blueprints to measure distances

4 products

Staff Gauges

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

4 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

5 products

Height Gauge Calibrators

Ensure height gauges are accurate

11 products

Counters

Record and display the number of times events or processes occur

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

Position Indicators

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

30 products

Layout Compasses

Draw circles and transfer distance measurements

2 products

Torque Sensors

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

22 products

Optical Comparators

Magnify your part to check for dimensional accuracy and surface defects

19 products

Fabricating and Machining

Tap, Die, and Thread File Sets

Repair internal and external threads in a range of sizes

1 product

Tap, Die, and Drill Bit Sets

Cut and repair internal and external threads and drill holes in many different sizes

1 product

Tap and Die Sets

Cut and repair internal and external threads in many sizes

7 products

Tap and Drill Bit Sets

Drill holes and cut internal threads in a variety of sizes

6 products

Taps

Cut internal threads for fasteners, pipe, conduit, and more

1,070 products

Dies

Cut or restore external threads on fasteners, pipe, or conduit

169 products

Thread-Repairing Files

Spot fix rusted and damaged threads along screws, pipe, or conduit

6 products

Friction Drill Bits

Pair with friction drills to melt holes that have an outer lip in sheet metal

11 products

Drill Bits

Create holes in metal, wood, plastic, concrete, and more

1,705 products

Broaches

Install in an arbor press, milling machine, or CNC machine to cut shapes into existing holes

70 products

Spring Locating Pins

Apply side force to workpieces to clamp them in place

37 products

End Mills

Cut and shape material to create precise slots, grooves, and profiles

1,236 products

Countersinks

Cut a cone-shaped opening in a hole to install flat-head screws and rivets flush with the surface

7 products

Hole Saws

Connect to a drill or drill press to make circular cuts

26 products

Lathe Tools

Shape workpieces as they rotate on a lathe

3 products

Hollow-Core Cutters

Use in magnetic-base drills to form burr-free holes by only cutting the outside edge of a hole

28 products

Reamers

Finish holes to an exact size, correct misaligned holes, and remove burrs

162 products

Slitting Saws

Pair with an arbor to cut narrow slots in workpieces

5 products

Hole Punches

Punch holes in metal, plastic, and fabric

135 products

Tube Benders

Bend hard and soft metal tubing with various outer diameters

6 products

Tube Flarers

Make flared ends on metal tubing so it's compatible with flared tube fittings

2 products

Pipe, Tube, and Hose Cutters

Make clean cuts in pipe, tube, hose, and conduit

1 product

Reamer Drill Bits

Drill and finish holes in one pass

11 products

Drill Taps

Drill and thread holes with the same bit

33 products

Power Transmission

Torque Limiters

Keep torque at or below a set limit to control tension or braking or protect machinery from overload

14 products

Electrical Power, Networking, and Controlling

Development Board Sensor Modules

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

5 products

Building and Machinery Hardware

T-Slotted Framing and Fittings

The most versatile system, attach fittings along the continuous slots to build virtually anything

3 products

Communication

Stencils

Paint over or trace to create everything from custom messages to drafting designs

4 products