Electrical Hardware | McMaster-Carr

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18,473 Products

Most Likely Products

Routing Clamps

Secure routed lines of pipe, tubing, and conduit

99 products

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

787 products

Terminals, Ferrules, and Lugs

Attach to the end of wire to connect circuits in control panels, motors, and machinery

1,224 products

Fieldbus Cable

Connect devices in Fieldbus communication networks

1 product

Conduit and Fittings

Protect wiring from impact and the environment in runs indoors, outdoors, and underground

1,092 products

All Results

Electrical Power, Networking, and Controlling

Fieldbus Cable

Connect devices in Fieldbus communication networks

1 product

Pendant Cable Hardware Kits

Hang equipment from drop-down cable

1 product

Power Cable

Deliver power to motors, pumps, appliances, computers, and more

309 products

Power Cords

Connect equipment and devices to a power source

263 products

Lead Wire

Your go-to wire for everything from electrical panels to plant equipment; also known as hook-up wire

320 products

Building Wire

With designations such as THHN or THWN, building wire brings power to wall outlets and outlet boxes

42 products

Control Cable

Send signals to control machinery and automated systems

589 products

Fiber-Optic Cable

Transmit signals between data centers and workstations in fiber-optic networks

12 products

Building Cable

With designations such as NM and UF, building cable brings power to wall outlets and outlet boxes

36 products

Ribbon Cable

Ultra flexible to connect components inside electronics

6 products

Servo Cable

Connect servocontrollers and servomotors in automated equipment and on assembly lines

8 products

CAN-Bus Cable

Connect devices in CAN-Bus communication networks

6 products

Variable-Frequency Drive Motor Cable

Connect variable-frequency drive motors to equipment

13 products

Irrigation Cable

Supply low-voltage power in sprinkler systems

8 products

Outdoor Lighting Cable

Power low-voltage lighting equipment, such as landscape lighting

3 products

Speaker Cable

Hook up speakers, intercoms, and other low-current devices to a building's wiring

4 products

DeviceNet Cable

Connect devices in DeviceNet communication networks

4 products

Modbus Cable

Connect devices in Modbus communication networks

2 products

Fire Alarm Cable

Protected by flame-resistant insulation for critical circuits in fire alarm systems

8 products

Thermostat Cable

Hook up thermostats, air-conditioning units, and other low-voltage equipment

12 products

Security Cable

Connect low-current security and intercom systems

53 products

Metric Circular Cords

Send power and signal to equipment with metric connections

474 products

Coaxial Cable

Transmit audio, data, and video signals

8 products

Ethernet Cable

Send data between computers, printers, servers, and switches

20 products

Submersible Pump Cable

Supply power to submersible pumps in water or oil wells

2 products

Profinet Cable

Connect devices in Profinet communication networks

2 products

Vehicle Cable

Make multiple connections in low-voltage vehicle wiring systems

12 products

Telephone Cable

Connect telephones and telephone blocks to a wall jack

6 products

Profibus Cable

Connect devices in Profibus communication networks

3 products

Pendant Cable

Supply power from an overhead source

8 products

Breakaway Cords

Disconnect if pulled to prevent stress on cord

6 products

Mitutoyo Cords

Connect your measuring tool to miniprocessors, multiplexers, or PCs

22 products

Solenoid Valve Cords

Connect solenoid components, such as valves and motors

59 products

Ethernet Cords

Send data between computers, printers, servers, and switches

318 products

Fiber-Optic Cords

Connect computers, servers, and switches in a fiber-optic network

34 products

Video Adapter Cords

Send video between devices with different connections

8 products

Audio Cords

Hook up speakers to an audio signal

13 products

Thunderbolt Cords

Transmit data and video at high speeds between PCs, mobile devices, and displays

2 products

DMX Cords

Connect to lighting equipment with five-pin XLR connections

3 products

Profibus Cords

Transmit data in automation systems and other networks

4 products

Coaxial Cords

Transmit audio, video, and data with minimal signal loss

70 products

Sensor Signal Adapter Cords

Send data between sensors and receivers that have different signal types

2 products

DisplayPort Cords

Send video from computers to monitors and other displays

26 products

Mini Cords

Often used to send power and control signals to automated systems, motors, and pumps

207 products

Robot Controller Cords

Extend the distance between a robot arm and a controller

3 products

D-Sub Cords

Connect computers, monitors, printers, and other devices with DB connections

199 products

USB Cords

Transfer data between computers, printers, and mobile devices

261 products

HDMI Cords

Send high-definition signals to monitors, TVs, and projectors

21 products

ix Industrial Cords

Send data or signals between equipment, such as a servomotor and encoder

6 products

Extension Cords

Extend the reach of power from an outlet

381 products

Robot Teach Pendant Cords

Connect robot controllers and teach pendants

25 products

Robot Teach Pendant Cord Reels

Keep the cords connecting your robot controller and teach pendant organized and out of the way

16 products

Circuit Board Cords

Short lengths of terminated wire make temporary connections on circuit boards

24 products

Ethernet Cord Reels

Keep an ethernet cord on hand but out of the way

1 product

Battery Wire

Transmit power from batteries in vehicles, generators, and appliances

27 products

Vehicle Wire

Make connections in low-voltage vehicle wiring systems

112 products

Magnet Wire

Wind into coils for high-speed winding applications, such as motors, transformers, and relays

26 products

Thermocouple Wire

Connect thermocouples to switches, controllers, recorders, and thermometers

64 products

RTD Wire

Connect RTD sensors to measurement and control devices

6 products

Extension Cord Reels

Keep extension cords easy to access without creating a tripping hazard

94 products

Terminals, Ferrules, and Lugs

Attach to the end of wire to connect circuits in control panels, motors, and machinery

1,224 products

Mini Connector Thread Adapters

Join two connectors that both have internal threads

6 products

Strain-Relief Connector Boots

Protect connectors and cords from strain, bends, and pulls

2 products

Ecomate Connectors

Connect machine tools, robots, and other vibrating equipment

14 products

Audio Connectors

Plugs, sockets, receptacles, and adapters to make audio connections

27 products

USB Connectors

Plugs, sockets, receptacles, and adapters to make USB connections

76 products

Coaxial Connectors

Plugs, sockets, receptacles, and adapters to make coaxial connections

59 products

Power Connectors

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

1,544 products

RJ45 Connectors

Plugs, sockets, and receptacles to make Ethernet connections

85 products

Ballast Connectors

Avoid exposure to live wires when replacing fluorescent ballasts

2 products

Mil. Spec. Connectors

Meet strict military standards or are compatible with Mil. Spec. connectors

167 products

ix Industrial Sockets

Pair with plugs to add ix Industrial connections to printed circuit boards

6 products

AMP Connectors

Build-your-own and ready-to-use AMP connectors

80 products

Molex Connectors

Plugs, sockets, and housings for making Molex connections

180 products

Breakaway Connectors

If pulled or stressed, these disconnect without damaging cables and equipment

3 products

Latching Connectors

Protect connections in wet or harsh environments while keeping them accessible

173 products

Sure Seal Connectors

A PVC housing keeps out liquids and dust and resists chemicals

6 products

DMX Connectors

Replace damaged plugs and sockets on lighting cables

2 products

Mini Connectors

Plugs, sockets, and receptacles send power and control signals to equipment and automated systems

78 products

Micro 360 Connectors

Plugs and sockets to make control and data connections in tight spaces

24 products

Metric Circular Connectors

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

292 products

Amphenol Connectors

Attach wires to a circuit board

32 products

D-Sub Connectors

Plugs, sockets, receptacles, and adapters for connecting computers, monitors, and printers

145 products

Han Connectors

Plugs and sockets to make Han connections

8 products

Solenoid Valve Connectors

Sockets and receptacles to connect solenoid components, such as valves and motors

17 products

Metric Circular Connector Caps

Keep metric circular connectors safe when they're not in use

8 products

Mil. Spec. Connector Caps

Protect Mil. Spec. connectors when they're not in use

12 products

Power Connector Caps

Cover pin-and-sleeve power connectors when they're not in use

34 products

Mini Connector Caps

Shield mini connectors when they're not in use

11 products

Wire Wrapping Tools

Wrap circuit board wire tightly around post terminals for a strong connection

3 products

Terminal Splitters

Divide one male quick-disconnect connection into two

4 products

Terminal and Splice Kits

Maintain a supply of extra terminals and splices to join and terminate wire

17 products

Terminal Blocks

Create tidy rows of wire connections that you can identify, test, and adjust on the spot

699 products

Distribution Blocks

Distribute electricity from a single power source to several devices in a circuit

8 products

Outlet Strips

Plug in multiple devices to power them from a single outlet

113 products

Wire Splices, Connectors, and Taps

Join wire and protect the connection

378 products

Terminal Adapters

Convert wire terminals from one connection type or gender to another

7 products

Welding Cords

Quickly connect your welder to an electrode or other component, or ground your setup

10 products

Wire Splice Covers

Seal out dust and moisture to protect electrical connectors

3 products

Outlet Strip Mounts

Snap in outlet strips for quick mounting on flat surfaces

2 products

Welding Cable

Resist abrasion while carrying current for welding

28 products

USB Chargers

Power up mobile devices and other electronics

19 products

Welding Cable Connectors

Plugs and sockets to deliver power to welding cable

13 products

Wrap Wire

Wrap around a circuit board post terminal without the need for soldering

11 products

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

787 products

Conduit and Fittings

Protect wiring from impact and the environment in runs indoors, outdoors, and underground

1,092 products

Outlet Boxes

House electrical components such as on-off switches, receptacles, and dimmer knobs

168 products

Electrical Enclosure Plugs

Block or seal holes in outlet boxes and enclosures to keep out debris, dust, and moisture

77 products

Weatherheads

Bring power into buildings and protect the entry point from rain and snow

10 products

Conduit Support Clips

Mount flexible plastic conduit to walls and machines

8 products

Fish Tape

Hook to the end of wire and move it through conduit and raceway

13 products

Cable Pulling Grips

Tug on the loop to tighten wire mesh around cable and pull it through conduit

14 products

Cable Support Grips

Reduce tension and vibration that damage hanging cable; also known as bus drop grips

75 products

Potting Boxes

Fill with potting compound to protect electronic assemblies from dust, moisture, and vibration

16 products

Conduit Threading Line

Vacuum or blow through conduit and attach to a rope for pulling cable

1 product

Fish Tape Leaders

Join fish tape to wire for guiding it around conduit bends

1 product

Fish Tape Pullers

Latch onto fish tape or rope for a secure, two-hand grip when pulling wire

1 product

Raceway and Fittings

Route and guard wiring along surfaces in your facility

73 products

Electrical Enclosures

House and protect power supplies, control panels, and other electrical equipment

1,880 products

Conduit Bumpers

Shield sections of flexible conduit from impact to prevent wear

5 products

Outlet Box Extenders

Add depth to an outlet box when there’s not enough space for components

50 products

Electronics Racks

Mount servers, automation controls, and computers in less space than electronics cabinets

9 products

Electronics Cabinets

Store and organize servers, computers, and automation controls

15 products

Outlet Box Covers

Enclose wiring for outlets and switches or block off unused components

71 products

Wire and Cable Push-Pull Rods

Maneuver cable inside drop ceilings and walls

4 products

Electrical Enclosure Covers

Replace Fibox enclosure covers

98 products

Cable Entry Panels

Pass multiple cords into an enclosure while sealing out moisture, dust, and other contaminants

127 products

Console Enclosures

Build out interfaces with buttons, gauges, and other components to monitor and control machinery

9 products

Electronics Rack Equipment Installation Supports

Create temporary ledges to support heavy equipment as you mount it to a rack

4 products

Underground Enclosures

Bury in the ground or in concrete to protect and access utilities such as electric and water lines

9 products

Conduit Locknut and Reaming Pliers

Tighten conduit locknuts and ream both the inside and outside of conduit with a single tool

1 product

Electrical Enclosure Pole Mounts

Everything you need to secure enclosures to round poles or beams

14 products

Electrical Enclosure Floor Stands

Mount enclosures to the floor above hazards such as water

8 products

Grounding Lugs

Create a common grounding path for internal components and circuits, as well as the enclosure body

1 product

Bonding and Grounding Reels

Neatly store included grounding clamp and cable, which prevent static buildup; tug to retract cable

12 products

Grounding Wire

Ground current in electrical systems

38 products

Grounding Straps

Flat shape creates more surface area contact than grounding wire

22 products

Lightning Rods

Attract lightning strikes to safely redirect them from the tops of buildings to the ground

17 products

Bonding and Grounding Clamps

Add cable or use included cable to create a grounding path, which prevents static charge buildup

39 products

Grounding Clamps

Attach grounding wire to equipment to ground electrical current

6 products

Grounding Rings

Create a pathway for stray currents to prevent damage to bearing surfaces in AC motors

22 products

EMI/RFI Suppressing Clips

Shield cable from EMI and RFI that can distort signals; also known as ferrite beads

12 products

Thermal Interface Pads

Soft and flexible, so they conform to rough surfaces and fill gaps between two surfaces

8 products

Voltage Adapters

Change AC voltage to DC voltage to power a device

276 products

Circuit Board Terminals

Connect wire to circuit boards

9 products

Development Boards

Prototype electronics and build simple automation systems by configuring inputs and outputs

6 products

PLCs

Program complex automation jobs by combining the functionality of a relay, timer relay, and switch

77 products

Circuit Boards

Create your own circuit board designs by adding components

72 products

Circuit Board Headers

Make quick connections to development boards and other circuit boards when prototyping

20 products

Development Board Cords

Connect your development board to components such as sensors and actuators

7 products

Development Board Programming Modules

Program development boards and other custom circuit boards

3 products

Development Board Holders

Keep a development board and breadboard in one spot for prototyping

1 product

Circuit Board Capacitors

Store electrical energy then release it all at once to briefly boost power to circuit boards

59 products

Single-Board Computers

Combine the functionality of a PC with the flexibility of a development board’s inputs and outputs

19 products

Development Board Sensor Modules

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

15 products

Circuit Board Voltage Regulators

Power circuits from a high-voltage source without frying your system

15 products

Computers

Sturdy and reliable for harsh industrial jobsites, from frigid freezers to sweltering foundries

18 products

Computer Monitors

Display information in tough conditions such as on factory floors and outdoor jobsites

9 products

Tablet Enclosures

Protect tablets and displays from dust and washdowns

5 products

Single-Board Computer Enclosures

Protect your Raspberry Pi, Arduino, or other board from dust and impact

9 products

Circuit Board Enclosures

Hold circuit boards to protect them from dust, liquids, or overheating

77 products

Circuit Board Cable

Flat and flexible, connect circuit boards inside electronic devices

20 products

Circuit Board Connectors

Connect flat flexible cable to circuit boards

10 products

Transformers

Raise or lower voltage to meet the needs of an individual circuit

60 products

Snap-Acting Switches

Open and close circuits quickly to minimize arcing and sticking; often used as door-open indicators

206 products

Power Supplies

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

259 products

Inverters

Transform DC voltage to power devices that run on AC voltage; prevent overload damage

3 products

Relays

Electrically open and close circuits to control power to lights, motors, and other equipment

366 products

Resistors

Limit the electrical current flowing through circuits, adjust signal levels, and divide voltages

491 products

Electronic Component Assortments

Include diodes, rectifiers, and transistors to convert current or amplify electronic signals

2 products

Magnetic Switches

Actuate when a magnet comes within sensing distance; often used to detect when doors or windows open

2 products

Varistors

Protect sensors, programmable logic controllers, and other small components from electrical surges

20 products

Rectifiers

Convert AC voltage to a constant DC voltage on a circuit board

30 products

Diodes

Route current in one direction and block it in the other to protect sensitive electronics

86 products

DIP Switches

Slide actuators to open or close each circuit to configure instructions for electronic devices

7 products

Push-Button Switches

Our most common switch type actuates circuits with the push of a button

18 products

Interface Relays

Isolate input and output circuits to protect PLCs and other controllers

48 products

Lighting Relays

Control lighting circuits and switch lighting systems on or off

13 products

Vehicle Relays

Switch high-current loads on vehicles, such as starters, headlights, and fuel pumps

36 products

Latching Relays

Lock into position so they don't require constant voltage to stay switched

27 products

Monitoring Relays

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

31 products

Infrequent-Cycle Relays

Use with equipment that cycles on and off, such as HVAC systems

147 products

Air-Actuated Relays

Convert an air signal on a pneumatic control system to an electric one

1 product

Safety Relays

Monitor circuits and force machines to a safe stop if the relay detects a fault

60 products

Alternating Relays

Automatically split run time between two devices so one isn't always running

1 product

Proportional-Control Relays

Gradually adjust output instead of turning on or off

12 products

Proximity Sensors

Detect the presence or position of objects from a short sensing distance

2 products

Battery Terminal Fasteners

Replace bolts in battery terminals

3 products

Battery Terminal Adapters

Convert one battery terminal style to another

6 products

Battery Chargers

Charge everything from large-cell to cordless tool to household batteries

3 products

Battery Holders

Create an electrical connection between batteries and contacts to power equipment

12 products

Battery Terminals

Connect cable to battery posts to power vehicles and machines

131 products

Battery Contacts

Add or replace contacts in battery holders and circuit boards

7 products

Wire and Cable Crimpers

Crimp connectors onto electrical wire or cable

3 products

Jumper Cords

Ready to connect with a terminal at one or both ends

17 products

Battery Cords

Connect batteries to each other

31 products

Material Handling

Routing Clamps

Secure routed lines of pipe, tubing, and conduit

99 products

Pipe Supports

Brace pipe, tube, and conduit that needs to be routed between studs or elevated off the floor

3 products

Bungee Cord Locks

Position on bungee cords to create stops and keep the cords from rubbing against surfaces

6 products

Cable Pulling Clamps

Maintain tension until a line can be permanently anchored

7 products

Ring Links

Bend, hammer, or twist closed to connect chain links and attach fittings

4 products

Vacuum Lifters

Grip and move objects with air- or electric-powered suction

3 products

Measuring and Inspecting

Test Leads

Pair with electrical testers such as multimeters to analyze your devices

23 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

Power Consumption Meters

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

1 product

Test Lead Wire

Add your own clips, tips, and adapters to link electrical testers to the units you're checking

4 products

Magnetic Field Indicators

Measure the strength of a magnetic field in gauss

1 product

Load Cell Junction Boxes

Join multiple load cells to combine their weight measurements

2 products

Decade Boxes

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

3 products

Fabricating and Machining

Electronic-Component Positioning Stands

Pin components against a circuit board to free up your hands for soldering

1 product

Raw Materials

Copper

Our most conductive metal for electrical applications—all with material certificates for traceability

86 products

Fastening and Joining

Snap-In Nuts

Push into square holes in thin materials to add bolts for aligning off-center parts

1 product

MIG Welding Wire

Use with MIG welders to fuse metals together

182 products

Welding Lugs

Screw, hammer, or crimp on to secure welding cable connections

13 products

Fluid Handling

Thermocouple Cords

Extend the reach of thermocouple probes

46 products

Thermocouple Connectors

Join thermocouple probes and wire to thermometers and control panels

4 products

Pressure Transmitters

Send pressure readings to controllers and remote displays

1 product

Thermocouple Connector Covers

Shield thermocouple connectors from dust and debris

1 product

Containers, Storage, and Furniture

Shelves

Use with frames to support and store a variety of items

8 products

Lighting

Light Bulbs

Standard household, miniature, compact, tubular, and ultraviolet bulbs

6 products

Light Socket Adapters

Convert light fixtures to accept different bulbs

1 product

Light Switch Sensor Guards

Protect light switch sensors from damage and vandalism

5 products

Light Switch/Receptacles

Combine a switch and receptacle into a single outlet box for a small footprint

2 products

Fiber-Optic Flashlight Cable

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

1 product

Heating, Ventilation, and Air Conditioning

Temperature-Controlled Outlet Adapters

Automatically turn heating and cooling devices on and off as temperatures rise and fall

3 products

Building and Machinery Hardware

Grommets

Protect wire, cable, and cords from holes with sharp or rough edges

49 products

Strut Channel Framing and Fittings

Secure fittings in the U-shaped channel to route conduit and pipe or build other structures

7 products

Protective Plugs

Insert into holes in pipe, containers, panels, and parts to keep out debris

248 products

Communication

Display Screens

Display text, numbers, symbols, and other information from your electronics

27 products

Wire Marker Installation Tools

Install wire markers

1 product