Contacts | McMaster-Carr

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C-UL Recognized Component

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Export Control Classification Number (ECCN)

EAR99

Horsepower @ Switching Voltage

DFARS Specialty Metals

Voltage

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5,027 Products

Electrical

Battery Contacts

Add or replace contacts in battery holders and circuit boards

23 products

Battery Holders

Create an electrical connection between batteries and contacts to power equipment

60 products

Battery Springs

Replace springs in battery holders and contacts

8 products

Battery Terminals

Connect cable to battery posts to power vehicles and machines

131 products

Manual Switch Contact Blocks

Mount to switches to control electrical circuits as you move the switch

41 products

Manual Switches

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

43 products

Motor Starters

Turn motors on and off and protect them from current overloads

414 products

Relays

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

766 products

Magnetic Switches

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

88 products

Limit Switches

Turn equipment on or off when objects touch the actuator; often used for conveyors and bin filling

149 products

Snap-Acting Switches

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

214 products

Disconnect Switches

Make sure equipment stays turned off during inspection and maintenance

215 products

Sensor Switches

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

13 products

Motor Switches

Turn motors, lighting, and electric heat circuits on and off

7 products

Tilt Switches

Trip circuits when tilted; use as position indicators, pump level controls, and limit switches

8 products

Transistors

Boost weak electrical signals and rapidly control data transmission

20 products

Safety Switches

Protect people by cutting power to machines when access doors open; also known as interlock switches

39 products

Transfer Switches

Switch to backup power during an outage

5 products

Terminals, Ferrules, and Lugs

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

1,270 products

Terminal Blocks

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

394 products

Electrical Connector Contacts

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

13 products

Circuit Board Terminals

Connect wire to circuit boards

9 products

Distribution Blocks

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

47 products

Slip Rings

Maintain an electrical link between a moving part and a stationary part

4 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

Electrical Cords

Connect equipment and devices to a power supply

10 products

Jumper Cables

Jump-start a dead battery

12 products

Distribution Posts

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

4 products

Wire Splices

Join wire and protect the connection

17 products

Distribution Bars

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

31 products

Terminal and Splice Kits

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

17 products

Grounding Lugs

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

1 product

Circuit Board Voltage Regulators

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

15 products

Fastening and Joining

Welding Lugs

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

13 products

MIG Gun Contact Tips

Attach to MIG guns to guide welding wire and electric current to the weld site

17 products

MIG Gun Gas Diffusers

Evenly distribute shielding gas for high-quality MIG welds

10 products

MIG Gun Nozzles

Direct shielding gas towards welds and protect contact tips from molten metal

33 products

Rivets

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

25 products

Snap-In Nuts

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

2 products

Lighting

Light Bulbs

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

104 products

Lubricating

Grease

Thicker than oil to evenly lubricate surfaces and stay in place

32 products

Antiseize Lubricants

Prevent threaded fasteners from sticking due to rust, dirt, and heat

31 products

Communication

Labels

Stick onto items to identify or convey information about them

1 product

Audible Alarms/Indicator Lights

Alert people with both light and sound

1 product

Audible Alarms

Everything from bells and whistles to horns and sirens

5 products

Power Transmission

Springs

Apply and absorb force with compression, die, extension, torsion, and disc springs

108 products

Raw Materials

Gallium

Transfers heat and electricity as a safe alternative to mercury in thermometers and thermostats

2 products