Metric Adapters | McMaster-Carr

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DFARS Specialty Metals

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Regulation (EC) No. 1935/2004

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14,073 Products

Most Likely Products

Pipe and Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases

1,973 products

Thread Adapters

Join threads of a different type, size, and gender

2,334 products

Tube Fittings

Make threaded, push to connect, barbed, and other types of connections between lengths of tube

4,666 products

Conduit Straights

Join conduit of different sizes and types, or attach conduit to a knockout in electrical boxes

53 products

All Results

Fluid Handling

Pipe and Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases

1,973 products

Tube Fittings

Make threaded, push to connect, barbed, and other types of connections between lengths of tube

4,666 products

Hose Fittings

Create threaded, barbed, quick-disconnect, and other types of connections between lengths of hose

686 products

Manifolds

Distribute air or fluid to multiple places from a single source; also called headers

29 products

Junction Blocks

Organize and separate multiple lines in a pipe system; air and fluid flow through the threaded holes

2 products

Duct Hose and Fittings

Connect to blowers and vacuums to move air, fumes, dust, chips, and liquid

35 products

Pressure Test Plugs

Tighten onto equipment to check pressure without permanently installing a gauge

3 products

Valve Stem Adapters

Connect valve stems to actuators with an ISO 5211 hole pattern

7 products

Manual On/Off Valves

Start and stop flow through a line

11 products

Fastening and Joining

Thread Adapters

Join threads of a different type, size, and gender

2,334 products

Standoffs

Separate, position, or connect components in assemblies

373 products

Spacers

Unthreaded to create space between two surfaces or objects, often to align them

147 products

Threaded Inserts

Create new threads or repair stripped threads

301 products

Adhesive-Mount Nuts

Attach threads to material that’s too thin for a threaded insert

66 products

Weld Nuts

Weld to metal surfaces to add permanent threads

133 products

Studs

Press, weld, or screw in place to add a threaded fastening point

6 products

Bit Adapters

Connect a variety of bits to drills, powered screwdrivers, ratchet wrenches, and other turning tools

2 products

Screwdriver Bits

Pair with drivers to turn screws

27 products

Driver Extension Adapters

Create a tool that’s as long as you need to reach deeply recessed fasteners

18 products

Sockets

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

11 products

Socket Bits

Switch out worn or damaged bits instead of replacing your entire bit socket

18 products

Socket Inserts

Slip into sockets to keep fasteners from falling out

2 products

Electrical Power, Networking, and Controlling

Conduit Straights

Join conduit of different sizes and types, or attach conduit to a knockout in electrical boxes

53 products

Conduit Elbows

Join conduit with 45°, 90°, offset, and adjustable-angle connectors

26 products

DIN Rail Mounting Adapters

Attach to components not made for DIN rail and clip on to install

14 products

DIN Rail Mounting Brackets

Create space behind rails to fit wiring and bulky components

12 products

Data Connection Hubs

Add USB, DisplayPort, or HDMI ports to your computer to connect multiple device

10 products

Power Connectors

Plugs, sockets, receptacles, and other connectors for powering equipment

25 products

I/O Modules

Remotely view measurements, adjust settings, and identify errors in sensors and actuators

28 products

USB Adapters

Connect mismatched USB cords and devices

11 products

Audio Cords

Hook up speakers to an audio signal

11 products

USB Cords

Transfer data between computers, printers, and mobile devices

1 product

Power Cords

Connect equipment and devices to a power source

4 products

Wire Splices

Connect wires end to end to extend or repair a run

6 products

Voltage Adapters

Change AC voltage to DC voltage to power a device

103 products

Power Supplies

Convert your facility's AC voltage to power equipment that runs on DC voltage

25 products

Power Over Ethernet Injectors

Power devices such as routers and wireless access points in areas lacking a power outlet

5 products

Switch Mounts

Mount switches to panel cutouts, tank walls, or conveyors

4 products

Ethernet Switches

Expand your data network by connecting computers, printers, and servers

37 products

Monitoring Relays

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

5 products

Lubricating

Grease Fitting Adapters

Mate grease fittings when the sizes and thread types don't match

11 products

Coolant Nozzle and Hose Adapters

Connect threaded coolant nozzles and hose to coolant supply ports on equipment such as CNC machines

3 products

Coolant Nozzles

Dispense coolant onto workpieces or tools directly from a tank

7 products

Measuring and Inspecting

Probe Stylus Accessories

Add components that extend length, adapt threads, or hold multiple styli at once

1 product

Variance Indicator Contact Point Adapters

Convert variance indicators to work with inch-size contact points or measure hard-to-reach spots

1 product

Outside Micrometer Tips

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

1 product

Power Transmission

Rod Ends

Use with connecting rods to support loads and control steering, tensioning, or pivoting motion

556 products

Rod End Nuts

Attach to rods, pipe, and tubing to make pivot and hinge points

8 products

Rod End Inserts

Attach to rod ends to increase the amount of misalignment they can handle

5 products

Swivel Joints

Handle shaft misalignment where ball joint rod ends won’t fit; also known as spherical bearings

34 products

Rod End Seals

Keep dirt out and lubrication in to extend the life of rod ends

8 products

Flexible Shaft Couplings

Connect two shafts that are misaligned to transfer rotary motion from one to the other

796 products

Rigid Shaft Couplings

Join two shafts that are aligned and handle higher torque than flexible shaft couplings

280 products

U-Joints

Transfer torque between shafts at an angle; handle more torque and misalignment than flexible shafts

18 products

Air Cylinder Mounts

Secure air cylinders to surfaces with brackets, rod clevises, and flanges

43 products

Air Cylinders

Push and pull loads to do everything from stamping materials to sorting parts on conveyors

225 products

Air to Hydraulic Power Units

Power a hydraulic cylinder with air to avoid the setup, cost, and mess of hydraulic fluid

8 products

Hydraulic Cylinder Mounts

Restrain cylinders and secure loads to the end of the rod

1 product

Pulley and Sprocket Bushings

Mount between a rotating shaft and equipment to secure the shaft and reduce vibration

223 products

Clutches

Start and stop the transmission of power to machinery

38 products

Bearing Adapter Sleeves

Close gaps between your bearing and shaft for a tight fit

15 products

Torque Limiters

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

14 products

Fabricating and Machining

Lathe Tap Holders

Insert into the Morse taper tailstock on a lathe to drive a square-shank tap

8 products

Tap Collets

Hold your tap firmly in a collet chuck or tap holder to create internal threads in workpieces

164 products

Tap Collet Holders

Hold tap collets on CNC machines

28 products

Milling Machine Collet Chucks

Secure collets in milling machine spindles

49 products

Deburring Tool Holders

Deburr using your CNC machine without complex programming

5 products

Material Handling

Robot Tool Mounts

Modify how tools attach to your robot arm

46 products

Robot Tool Changers

Swap end-of-arm tooling in a snap

24 products

Robot Pedestals

Elevate robot arms so they can reach raised surfaces, such as conveyor belts and workstations

2 products

Vacuum Lifter Dampers

Stick onto vacuum lifters to create a soft surface for moving delicate parts

2 products

Gripper Compensation Devices

Let grippers grab uneven parts to avoid jams during assembly, picking, and machine tending

7 products

Containers, Storage, and Furniture

Syringe Adapters

Convert plastic syringe barrels into syringes for air-powered dispensers

8 products

Building and Machinery Hardware

Leveling Mount Inserts

Slip onto equipment and furniture to add threaded-stud leveling feet

15 products

Sealing

Hose Washers

Place inside nozzles and spigots to prevent leaks in an attached hose

2 products