Circuit Connectors | McMaster-Carr

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2,418 Products

Electrical

Electrical Plugs

Pair with sockets or receptacles to transmit power or data

58 products

Electrical Sockets

Pair with plugs or receptacles to transmit power or data

39 products

Circuit Board Headers

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

20 products

Wire Splices, Connectors, and Taps

Join wire and protect the connection

6 products

Terminals, Ferrules, and Lugs

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

1,249 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

39 products

Distribution Bars

Route electricity within switchboards and battery banks; also known as bus bars

31 products

Distribution Posts

Send power from one source to several devices in a circuit in less space than a distribution block

4 products

Electrical Cords

Connect equipment and devices to a power supply

11 products

Electrical Connector Contacts

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

6 products

Circuit Board Terminals

Connect wire to circuit boards

9 products

Terminal Adapters

Convert wire terminals from one connection type or gender to another

7 products

Electrical Cable

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

20 products

Electrical Wire

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

32 products

Grounding Lugs

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

1 product

Battery Terminals

Connect cable to battery posts to power vehicles and machines

129 products

Circuit Board Voltage Regulators

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

15 products

Fastening and Joining

Welding Lug Covers

Install over welding lugs to prevent accidental contact with other connections

1 product

Welding Lugs

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

13 products