Electrical Hardware | McMaster-Carr

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17,830 Products

Most Likely Products

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

800 products

Conduit and Conduit Fittings

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

1,064 products

Split-Bolt Connectors

Splice large wire sizes without special tools

17 products

Grounding Lugs

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

1 product

Electrical Plugs

Pair with sockets or receptacles to transmit power or data

1,075 products

Electrical Wire

Make single-wire connections; generally for lower voltages and shorter distances than cable

637 products

All Results

Electrical

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

800 products

Conduit and Conduit Fittings

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

1,064 products

Fish Tape

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

15 products

Outlet Boxes

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

99 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

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

74 products

Potting Boxes

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

11 products

Electrical Enclosures

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

1,556 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

72 products

Wire and Cable Push-Pull Rods

Maneuver cable inside drop ceilings and walls

4 products

Cable Entry Panels

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

120 products

Interference Suppressing Clips

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

12 products

Raceway and Raceway Fittings

Route and guard wiring along indoor surfaces

73 products

Console Enclosures

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

3 products

Tablet Enclosures

Protect tablets and displays from dust and washdowns

5 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

4 products

Single-Board Computer Enclosures

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

6 products

Circuit Board Enclosures

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

61 products

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

Split-Bolt Connectors

Splice large wire sizes without special tools

17 products

Electrical Plugs

Pair with sockets or receptacles to transmit power or data

1,075 products

Electrical Wire

Make single-wire connections; generally for lower voltages and shorter distances than cable

637 products

Electrical Cable Hardware Kits

Hang equipment from drop-down cable

1 product

Circuit Board Terminals

Connect wire to circuit boards

9 products

Electrical Cable

Make multi-wire connections; generally for higher voltages and longer distances than wire

1,171 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

Electrical Cord Adapters

Change the electrical connection style between an outlet and your equipment

27 products

Terminals, Ferrules, and Lugs

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

1,227 products

Terminal Blocks

Mate with terminals to complete circuits in control panels, motors, and small machines

394 products

Distribution Blocks

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

8 products

Electrical Receptacles

Install in a wall or panel to transmit power or data to plugs or sockets

965 products

Electrical Adapters

Change electrical connectors to another type, size, or gender

75 products

Electrical Cords

Connect equipment and devices to a power supply

2,366 products

Electrical Connector Contacts

Crimp wire into pins and sleeves to create custom Molex or Amphenol connectors

13 products

Electrical Connector Seals

Add to the front or back of connectors to block out dust, debris, and weather

5 products

Electrical Connector Boots

Protect connectors and cords from strain, bends, and pulls

2 products

Outlet Strips

Plug in multiple devices to power them from a single outlet

121 products

Circuit Board Headers

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

20 products

Wire Splices

Join wire and protect the connection

359 products

Development Board Cords

Connect your development board to components such as sensors and actuators

7 products

Electrical Cord Reels

Neatly store electrical cords for easy access

92 products

Terminal Adapters

Convert wire terminals from one connection type or gender to another

7 products

Electrical Sockets

Pair with plugs or receptacles to transmit power or data

593 products

Electrical Connector Caps

Protect data connectors when not in use

65 products

Electrical Connector Thread Adapters

Join two connectors that both have internal threads

6 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

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

Bonding and Grounding Clamps

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

39 products

Grounding Rings

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

20 products

Thermal Interface Material

Dissipate heat away from electronic components

8 products

Lightning Rods

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

17 products

Resistors

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

491 products

Circuit Board Voltage Regulators

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

15 products

Varistors

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

20 products

Diodes

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

86 products

Battery Terminal Fasteners

Replace bolts in battery terminals

3 products

Battery Terminal Adapters

Convert one battery terminal style to another

6 products

Transformers

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

60 products

Development Boards

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

2 products

Voltage Adapters

Change AC voltage to DC voltage to power a device

277 products

Snap-Acting Switches

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

180 products

Battery Chargers

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

3 products

Circuit Boards

Create your own circuit board designs by adding components

72 products

Inverters

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

3 products

Battery Holders

Create an electrical connection between batteries and contacts to power equipment

12 products

Relays

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

698 products

Sensor Switches

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

2 products

Development Board Programming Modules

Program development boards and other custom circuit boards

2 products

Electronic Component Kits

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

2 products

Development Board Holders

Keep a development board and breadboard in one spot for prototyping

1 product

Battery Terminals

Connect cable to battery posts to power vehicles and machines

131 products

Manual Switches

Everything from toggle, push-button, and rocker switches to foot switches

25 products

Magnetic Switches

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

2 products

Battery Contacts

Add or replace contacts in battery holders and circuit boards

12 products

Light Switch Sensor Guards

Protect light switch sensors from damage and vandalism

5 products

Circuit Board Capacitors

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

59 products

Wire and Cable Crimpers

Crimp connectors onto electrical wire or cable

3 products

Single-Board Computers

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

17 products

Development Board Sensor Modules

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

15 products

Rectifiers

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

30 products

Computers

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

5 products

Light Switch/Receptacles

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

2 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

2 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

MIG Welding Wire

Use with MIG welders to fuse metals together

183 products

Welding Cables

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

10 products

Welding Lugs

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

12 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

Material Handling

Bungee Cord Locks

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

6 products

Robot Teach Pendant Cords

Replace the cord that connects robot controllers to teach pendants

25 products

Robot Teach Pendant Cord Reels

Keep the cords connecting robot controllers to teach pendants organized and out of the way

17 products

Cable Pulling Clamps

Maintain tension until a line can be permanently anchored

7 products

Pipe Supports

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

3 products

Routing Clamps

Secure routed lines of pipe, tubing, and conduit

99 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

11 products

Containers, Storage, and Furniture

Shelves

Use with frames to support and store a variety of items

6 products

Lighting

Light Bulbs

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

6 products

Building and Machinery Hardware

Grommets

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

49 products

Protective Plugs

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

248 products

Strut Channel Framing and Fittings

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

7 products

Communication

Display Screens

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

27 products

Computer Monitors

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

9 products