Fully Insulated Splices | McMaster-Carr

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291 Products

Wire Splices, Connectors, and Taps

Wire Tap/Connector

Wire Tap/Connectors

Tap or join larger wires than standard wire taps and connectors

65 products

Underground Wire Tap/Connectors

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

5 products

Butt Splice

Crimp-On Butt Splices

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

10 products

Tight-Hold Heat-Shrink Butt Splices

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

9 products

Heat-Shrink Crimp-On Butt Splices

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

8 products

Underground Heat-Shrink Set Screw Butt Splices

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

2 products

Quick-Connect Clamp-On Butt Splices

Pop onto wire by hand instead of fussing with crimping tools

8 products

Tight-Hold Heat-Shrink Butt Splice Assortments

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

1 product

Watertight Insulation-Piercing Butt Splices

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

3 products

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

Splice two wires into one for a tidier setup

4 products

Tight-Hold Heat-Shrink Reducing Butt Splices

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

4 products

Watertight Set Screw Butt Splices

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

1 product

Set Screw Butt Splices

Connect thicker wires than crimp-on butt splices

4 products

Quick-Connect Push-On Butt Splices

An economical alternative to quick-connect clamp-on splices

1 product

Reducing Crimp-On Butt Splices

Connect two components with different wire sizes

4 products

Compression Butt Splices

Connect thicker wires than crimp-on butt splices

4 products

Twist-On Butt Splices

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

5 products

Heat-Shrink Reducing Crimp-On Butt Splices

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

8 products

Moisture-Resistant Crimp-On Butt Splices

Filled with grease to repel moisture and maintain a strong connection

3 products

Watertight Reducing Insulation-Piercing Butt Splices

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

3 products

Moisture-Resistant Twist-On Butt Splices

Sealed end caps repel moisture to keep wires dry and conductive

4 products

Twist-On Butt Splice Assortments

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

2 products

Wire Connector

Quick-Connect Clamp-On Wire Connectors

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

15 products

Moisture-Resistant Insulation-Piercing Wire Connectors

Filled with gel to repel moisture and prevent corrosion

9 products

Crimp-On Wire Connectors

Squeeze onto wires for a stronger grip than standard connectors

4 products

Quick-Connect Clamp-On Wire Connector Assortments

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

1 product

Twist-On Wire Connectors

Twist onto wires without crimping for fast and easy installation

28 products

Insulation-Piercing Wire Connectors

Bite through insulation to connect wires without stripping them first

3 products

Quick-Connect Push-On Wire Connectors

Push wire into place to save time over crimping or twisting

22 products

Tight-Hold Heat-Shrink Wire Connectors

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

3 products

Moisture-Resistant Twist-On Wire Connectors

Filled with silicone to repel moisture and prevent corrosion

9 products

Heat-Shrink Crimp-On Wire Connectors

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

2 products

Quick-Connect Push-On Wire Connector Assortments

Join two to eight wires without stopping to crimp connectors

2 products

Underground Twist-On Wire Connectors

Protect underground connections from moisture, corrosion, and stress

1 product

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

1 product

Twist-On Wire Connector Assortments

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

1 product

Set Screw Wire Connectors

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

3 products

Wire Tap

Insulation-Piercing Wire Taps

Bite into an installed wire to power additional lines

8 products

Insulation-Piercing Wire Taps for Snap-Plug Terminals

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

1 product

Moisture-Resistant Insulation-Piercing Wire Taps

Filled with gel to repel moisture and prevent corrosion

2 products

Insulation-Piercing Wire Taps for Quick-Disconnect Terminals

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

3 products

Twist-On Insulation-Piercing Wire Taps

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

5 products

Twist-On Insulation-Piercing Wire Tap Assortments

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

1 product

Other Products

Terminal and Splice Kits

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

12 products