Wire Couplings | McMaster-Carr

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1/64" to 11/16"

1/64" to 23/32"

1/64" to 1 1/8"

1/64" to 1 1/4"

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10,613 Products

Wire Splices, Connectors, and Taps

Butt Splice

Crimp-On Butt Splices

Crimp-On Butt Splices

Connect wires end to end to extend a run or repair a line

Set Screw Butt Splices

Set Screw Butt Splices

Connect thicker wires than crimp-on butt splices

Compression Butt Splices

Compression Butt Splices

Connect thicker wires than crimp-on butt splices

Quick-Connect Clamp-On Butt Splices

Quick-Connect Clamp-On Butt Splices

Pop onto wire by hand instead of fussing with crimping tools

Heat-Shrink Crimp-On Butt Splices

Heat-Shrink Crimp-On Butt Splices

Insulation shrinks when heated for a tighter grip than standard butt splices

Tight-Hold Heat-Shrink Butt Splices

Tight-Hold Heat-Shrink Butt Splices

Solder stiffens and secures the wire through the heaviest vibrations and sharpest tugs

Tight-Hold Heat-Shrink Butt Splice Assortments

Tight-Hold Heat-Shrink Butt Splice Assortments

Keep multiple sizes on hand and heat the splice to strengthen the connection with solder

Reducing Compression Butt Splices

Reducing Compression Butt Splices

Connect two components with different wire sizes

Heat-Shrink Reducing Crimp-On Butt Splices

Heat-Shrink Reducing Crimp-On Butt Splices

A step up in strength and strain relief over standard butt splices

Underground Heat-Shrink Set Screw Butt Splices

Underground Heat-Shrink Set Screw Butt Splices

Enclosed in durable plastic tubing so you can bury in rocky soil

Watertight Set Screw Butt Splices

Watertight Set Screw Butt Splices

End caps seal off the wire so it stays completely dry and conductive

Moisture-Resistant Twist-On Butt Splices

Moisture-Resistant Twist-On Butt Splices

Sealed end caps repel moisture to keep wires dry and conductive

Tight-Hold Butt Splices

Tight-Hold Butt Splices

Solder stiffens and strengthens the wire so it won't fray when vibrated

Reducing Crimp-On Butt Splices

Reducing Crimp-On Butt Splices

Connect two components with different wire sizes

Twist-On Butt Splices

Twist-On Butt Splices

Insert wires and twist on the caps to lock wires in place when vibrated and pulled

Heat-Shrink 2-to-1 Wire Crimp-On Butt Splices

Heat-Shrink 2-to-1 Wire Crimp-On Butt Splices

Splice two wires into one for a tidier setup

Tight-Hold Heat-Shrink Reducing Butt Splices

Tight-Hold Heat-Shrink Reducing Butt Splices

Join two sizes of wire and heat the splice to strengthen the connection with solder

Moisture-Resistant Crimp-On Butt Splices

Moisture-Resistant Crimp-On Butt Splices

Filled with grease to repel moisture and maintain a strong connection

Watertight Insulation-Piercing Butt Splices

Watertight Insulation-Piercing Butt Splices

Gel seals off the wire so it stays completely dry and conductive

Watertight Reducing Insulation-Piercing Butt Splices

Watertight Reducing Insulation-Piercing Butt Splices

Join two wires of different sizes while keeping the connection dry and conductive

Twist-On Butt Splice Assortments

Twist-On Butt Splice Assortments

Bring multiple sizes to a job and leave the installation tools behind

Quick-Connect Push-On Butt Splices

Quick-Connect Push-On Butt Splices

An economical alternative to quick-connect clamp-on splices

Wire Tap/Connector

Wire Tap/Connectors

Wire Tap/Connectors

Tap or join larger wires than standard wire taps and connectors

Underground Wire Tap/Connectors

Underground Wire Tap/Connectors

Double O-rings and EPDM insulation withstand moisture and stress underground

Wire Connector

Twist-On Wire Connectors

Twist-On Wire Connectors

Twist onto wires without crimping for fast and easy installation

Quick-Connect Clamp-On Wire Connector Assortments

Quick-Connect Clamp-On Wire Connector Assortments

Join two, three, or five wires without stopping to crimp connectors

Quick-Connect Clamp-On Wire Connectors

Quick-Connect Clamp-On Wire Connectors

Flip the clamp down on your wire to save time over crimping

Crimp-On Wire Connectors

Crimp-On Wire Connectors

Squeeze onto wires for a stronger grip than standard connectors

Set Screw Wire Connectors

Set Screw Wire Connectors

Tighten the set screw into the metal barrel for a firm grip on the wire

Insulation-Piercing Wire Connectors

Insulation-Piercing Wire Connectors

Bite through insulation to connect wires without stripping them first

Moisture-Resistant Twist-On Wire Connectors

Moisture-Resistant Twist-On Wire Connectors

Filled with silicone to repel moisture and prevent corrosion

Quick-Connect Push-On Wire Connectors

Quick-Connect Push-On Wire Connectors

Push wire into place to save time over crimping or twisting

Moisture-Resistant Insulation-Piercing Wire Connectors

Moisture-Resistant Insulation-Piercing Wire Connectors

Filled with gel to repel moisture and prevent corrosion

Tight-Hold Heat-Shrink Wire Connectors

Tight-Hold Heat-Shrink Wire Connectors

Solder stiffens and secures the wire through the heaviest vibrations and sharpest tugs

Heat-Shrink Crimp-On Wire Connectors

Heat-Shrink Crimp-On Wire Connectors

Shrink when heated for a stronger grip than standard crimp-on connectors

Quick-Connect Push-On Wire Connector Assortments

Quick-Connect Push-On Wire Connector Assortments

Join two to eight wires without stopping to crimp connectors

Twist-On Wire Connector and Insulation-Piercing Wire Tap Assortments

Twist-On Wire Connector and Insulation-Piercing Wire Tap Assortments

Twist connectors onto wire ends or pierce insulation with a tap to create a new circuit

Twist-On Wire Connector Assortments

Twist-On Wire Connector Assortments

Bring a range of sizes to the job and twist them onto wires without crimping tools

Underground Twist-On Wire Connectors

Underground Twist-On Wire Connectors

Protect underground connections from moisture, corrosion, and stress

Split-Bolt Splice

Split-Bolt Splices

Split-Bolt Splices

Tighten a hex nut for a strong hold on large wires

Wire Tap

Insulation-Piercing Wire Taps

Insulation-Piercing Wire Taps

Bite into an installed wire to power additional lines

Easy-Insert Lay-In Wire Taps

Easy-Insert Lay-In Wire Taps

Lay wire into your tap on the first try instead of poking and threading

Twist-On Insulation-Piercing Wire Taps

Twist-On Insulation-Piercing Wire Taps

Twist the cap for a tighter grip on the wire than other taps

Insulation-Piercing Wire Taps for Snap-Plug Terminals

Insulation-Piercing Wire Taps for Snap-Plug Terminals

Pop snap plugs in and out to restore or break connections without rewiring

Insulation-Piercing Wire Taps for Quick-Disconnect Terminals

Insulation-Piercing Wire Taps for Quick-Disconnect Terminals

Pop quick-disconnect terminals in and out to restore or break connections without rewiring

Moisture-Resistant Insulation-Piercing Wire Taps

Moisture-Resistant Insulation-Piercing Wire Taps

Filled with gel to repel moisture and prevent corrosion

Twist-On Insulation-Piercing Wire Tap Assortments

Twist-On Insulation-Piercing Wire Tap Assortments

Keep a variety of sizes on hand to tap any wiring in your facility

Multi-Direction Splice

Multi-Direction Heat-Shrink Crimp-On Splices

Multi-Direction Heat-Shrink Crimp-On Splices

A step up in strength and strain relief over standard multi-direction splices

Multi-Direction Crimp-On Splices

Multi-Direction Crimp-On Splices

Streamline wiring from multiple components into a single circuit

Other Products

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

Wire Rope Compression Sleeves

Wire Rope Compression Sleeves

Install a permanent loop at wire rope ends using a compression tool

Swivels

Rotate loads to keep rope and chain from twisting and knotting

Grommets

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

Molex Connectors

Molex Connectors

Plugs, sockets, and housings for making Molex connections

Terminal and Splice Kits

Terminal and Splice Kits

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

Power Connectors

Power Connectors

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

Conduit and Fittings

Conduit and Fittings

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

Metric Circular Cords

Metric Circular Cords

Send power and signal to equipment with metric connections

Mil. Spec. Connectors

Mil. Spec. Connectors

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

Shackles

Lift, pull, and anchor heavy loads while keeping them secure with a pin

Light Switch/Receptacles

Light Switch/Receptacles

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

Conduit Bumpers

Conduit Bumpers

Shield sections of flexible conduit from impact to prevent wear

Cable Entry Panels

Cable Entry Panels

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

RJ45 Connectors

RJ45 Connectors

Plugs, sockets, and receptacles to make Ethernet connections

AMP Connectors

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

Welding Cable Connectors

Welding Cable Connectors

Plugs and sockets to deliver power to welding cable

Wire Splice Covers

Wire Splice Covers

Seal out dust and moisture to protect electrical connectors

Turnbuckles

Twist the body or end fittings to adjust the length and tension of attached rope and chain

Extension Cords

Extension Cords

Extend the reach of power from an outlet

Metric Circular Connectors

Metric Circular Connectors

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

Power Cords

Connect equipment and devices to a power source

USB Cords

Transfer data between computers, printers, and mobile devices

Mini Cords

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

Latching Connectors

Latching Connectors

Protect connections in wet or harsh environments while keeping them accessible

Ethernet Cords

Send data between computers, printers, servers, and switches

D-Sub Connectors

D-Sub Connectors

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

Chain Rings

Join chains and add connectors for binding, towing, and lifting

Quick Links

Join rope, cable, and chain to secure loads

Tag Rings

Loop onto tags to attach them to lanyards, key rings, and other objects

Electrical Connector Caps

Electrical Connector Caps

Protect data connectors when not in use

USB Connectors

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

Mini Connectors

Mini Connectors

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

EMI/RFI Suppressing Clips

EMI/RFI Suppressing Clips

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

Solenoid Valve Cords

Solenoid Valve Cords

Connect solenoid components, such as valves and motors

Coaxial Connectors

Coaxial Connectors

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

Chain Barrier Links

Chain Barrier Links

Split in half and snap back together to securely connect lengths of chain

Ring Links

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

Webbing Rings

Add looped connection spots

Amphenol Connectors

Amphenol Connectors

Attach wires to a circuit board

Audio Connectors

Audio Connectors

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

D-Sub Cords

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

USB Chargers

Power up mobile devices and other electronics

Micro 360 Connectors

Micro 360 Connectors

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

Solenoid Valve Connectors

Solenoid Valve Connectors

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

Ecomate Connectors

Ecomate Connectors

Connect machine tools, robots, and other vibrating equipment

HDMI Adapters

Convert one HDMI size or style to another

Circuit Board Connectors

Circuit Board Connectors

Connect flat flexible cable to circuit boards

Weatherheads

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

Fiber-Optic Connectors

Fiber-Optic Connectors

Join fiber-optic cords that have the same gender and connection type

Conduit Support Clips

Conduit Support Clips

Mount flexible plastic conduit to walls and machines

Strain-Relief Connector Boots

Strain-Relief Connector Boots

Protect connectors and cords from strain, bends, and pulls

Video Adapter Cords

Video Adapter Cords

Send video between devices with different connections

Video Adapters

Convert from one video connection to another

Grounding Clamps

Grounding Clamps

Attach grounding wire to equipment to ground electrical current

Han Connectors

Plugs and sockets to make Han connections

ix Industrial Sockets

ix Industrial Sockets

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

Sure Seal Connectors

Sure Seal Connectors

A PVC housing keeps out liquids and dust and resists chemicals

HDMI Cords

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

Power Supplies

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

Strut Channel Conduit Connection Plates

Strut Channel Conduit Connection Plates

Convert strut channel into a raceway for electrical wiring

Breakaway Connectors

Breakaway Connectors

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

Heat-Shrink Tubing

Heat-Shrink Tubing

Apply heat to seal and insulate electrical wiring and connections

Temperature-Controlled Outlet Adapters

Temperature-Controlled Outlet Adapters

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

USB Extenders

Increase the reach of USB devices with a transmitter and receiver

Ballast Connectors

Ballast Connectors

Avoid exposure to live wires when replacing fluorescent ballasts

CB Radio Connectors

CB Radio Connectors

Sockets and receptacles to connect CB radios

DMX Connectors

Replace damaged plugs and sockets on lighting cables

Sensor Signal Adapter Cords

Sensor Signal Adapter Cords

Send data between sensors and receivers that have different signal types

DisplayPort Connectors

DisplayPort Connectors

Connect two DisplayPort cords of the same gender and connection type

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)