Metric Extensions | McMaster-Carr

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System of Measurement

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Export Control Classification Number (ECCN)

EAR99

RoHS

Compliant

Compliant with Exemptions

Not Compliant

REACH

Compliant

Not Compliant

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

Hex Size

DFARS Specialty Metals

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Shape

Stud Length

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Threaded Through Hole

Unthreaded Through Hole

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Tamper-Resistant Torx

For Adapting

Nut Type

Thread Fit

Unified Standard Class 2A

Unified Standard Class 2B

Specifications Met

End Type

Tensile Strength

3,599 Products

Fastening and Joining

Thread Adapters

Join threads of a different type, size, and gender

2,334 products

Coupling Nuts

Connect and extend threaded rods

183 products

Hex Nuts

Handle most general fastening needs

14 products

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

24 products

Sockets

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

17 products

Socket Bits

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

18 products

Bit Adapters

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

2 products

Screwdrivers

Tighten and loosen screws

16 products

Driver Extension Adapters

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

18 products

Measuring and Inspecting

Probe Stylus Accessories

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

9 products

Variance Indicator Extension Rods

Lengthen the reach of your variance indicator

8 products

Electrical Power, Networking, and Controlling

Power Connectors

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

33 products

Solenoid Valve Sockets

Pair with plugs or receptacles to connect solenoid components

1 product

Metric Circular Connectors

Plugs, sockets, receptacles, and adapters for equipment with metric connections

59 products

USB Adapters

Connect mismatched USB cords and devices

11 products

Latching Connector Inserts

Male and female inserts for making connections inside hoods and bases

4 products

USB Cords

Transfer data between computers, printers, and mobile devices

1 product

Audio Cords

Hook up speakers to an audio signal

11 products

Power Cords

Connect equipment and devices to a power source

4 products

Data Connection Hubs

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

10 products

Power Transmission

Extension Springs

When stretched, springs pull their ends back together

338 products

Fabricating and Machining

Taps

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

36 products

Drill Bits

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

86 products

Material Handling

Robot Tool Extensions

Attach extensions to robot arms

9 products

Conveyor Guide Clamps

Connect conveyor guides to each other and secure them in place

1 product

Building and Machinery Hardware

Adjustable Handles

Lift and turn to easily position and tighten components; also called clamping handles

323 products

Crank Handles

The offset handle gives extra leverage to maximize turning force

29 products