Electrical Contacts | McMaster-Carr

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3,053 Products

Electrical Power, Networking, and Controlling

Relay Contacts

Replace contacts on your relay

47 products

Circuit Board Terminals

Connect wire to circuit boards

9 products

Motor Starters

Turn motors on and off and protect them from current overloads

451 products

Circuit Board Voltage Regulators

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

15 products

Electronic Component Assortments

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

2 products

Ribbon Switch Termination Kits

Pair with your cut-to-length ribbon switch for a complete system

3 products

Terminals, Ferrules, and Lugs

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

1,268 products

Molex Connectors

Plugs, sockets, and housings for making Molex connections

24 products

Amphenol Sleeves

Combine with a wire to make a connection with a circuit board

2 products

Terminal Blocks

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

699 products

Terminal Adapters

Convert wire terminals from one connection type or gender to another

7 products

Terminal Splitters

Divide one male quick-disconnect connection into two

4 products

Distribution Bars

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

31 products

Wire Splices

Connect wires end to end to extend or repair a run

17 products

Terminal and Splice Kits

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

17 products

Distribution Posts

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

4 products

Distribution Blocks

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

47 products

Battery Contacts

Add or replace contacts in battery holders and circuit boards

23 products

Battery Springs

Replace springs in battery holders and contacts

8 products

Jumper Cords

Ready to connect with a terminal at one or both ends

10 products

Battery Holders

Create an electrical connection between batteries and contacts to power equipment

60 products

Battery Terminals

Connect cable to battery posts to power vehicles and machines

131 products

Grounding Lugs

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

1 product

Fastening and Joining

Snap-In Nuts

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

1 product

Rivets

Join materials together permanently, especially when too thin or fragile to fasten with screws

25 products

Welding Lugs

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

13 products

Lighting

Light Bulbs

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

87 products