Crimpless Butt Splices | McMaster-Carr

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44 Products

Twist-On Butt Splices

Insert wires end to end and lock them in place with the twist of a cap. These splices resist vibration and pulling to keep a secure connection between wires. They're convenient for field installations when you don't have crimping tools handy.

	For Wire
	Ga.	Construction	Lg.	Insulation Color	Terminal Material	Max. Temp., ° F	Max. Voltage	Certification	Pkg. Qty.		Pkg.
Nylon Insulation



		26 to 20	Stranded	0.75"	Red	Tin-Plated Brass	245	600V AC 600V DC	UL Listed	8	0000000	000000


		24 to 18	Stranded	1.1"	Red	Tin-Plated Brass	245	600V AC 600V DC	UL Listed	9	000000	00000
		16 to 14	Stranded	1.1"	Blue	Tin-Plated Brass	245	600V AC 600V DC	UL Listed	9	0000000	00000
		12 to 10	Stranded	1.5"	Yellow	Tin-Plated Brass	245	600V AC 600V DC	UL Listed	7	0000000	00000
		8 to 6	Stranded	1.7"	Green	Tin-Plated Brass	245	600V AC 600V DC	UL Listed	6	0000000	00000

Quick-Connect Clamp-On Butt Splices

Flip a clamp onto your wire instead of crimping to speed up installations and reuse your splice later. Choose these splices for setups that change often, such as prototypes and testing. They even have test sockets to safely test voltage after installation.

	For Wire
	Ga.	Construction	Lg.	Insulation Color	Lever Color	Terminal Material	Max. Temp., ° F	Max. Voltage	No. of Test Sockets	Certification	Pkg. Qty.		Pkg.
Polycarbonate Insulation



		18 to 12 20 to 12	Stranded Solid	1.4"	Clear	Orange	Tin-Plated Copper	220	600V AC 600V DC	1	C-UL Listed, UL Listed	60	0000000	000000

Accessories for Wire Splices, Connectors, and Taps

Holders

Holders mount and organize the inline splices. Slide the flange of one holder into the groove of another to connect them.

Screw On—More secure than snap-on holders.

Snap On—Quick to install, these are a good choice if you’re attaching multiple holders to a DIN rail.

							Screw On		Snap On
For No. of Splices	Lg.	Wd.	Ht.	Material	Color	Pkg. Qty.		Pkg.		Pkg.
1	2.21"	0.47"	0.26"	Plastic	Gray	5	0000000	00000	0000000	00000
3	2.21"	1.17"	0.26"	Plastic	Gray	5	0000000	0000	0000000	0000

DIN Rail Mounting Adapters

Clip connectors onto DIN 3 rail to keep them organized and easily accessible.

							For Screw On		For Snap On
For DIN Rail Size, mm	Lg.	Wd.	Ht.	Material	Color	Pkg. Qty.		Pkg.		Pkg.
35	1.67"	0.25"	0.43"	Plastic	Gray	25	0000000	000000	0000000	000000

Covers

Seal out moisture to protect your connection. Covers are lined with a sticky gel, so you don't need to mix or pour a potting compound yourself. They’re rated IP08 to withstand splashes, rain, and humidity. To repair or expand your circuit, open the cover and remove the wires so you can reuse them. However, you'll need to replace the splice and cover after you open the cover and remove the gel.

For Wire Ga.	Lg.	Wd.	Ht.	Material	Color	Filler Material	Enclosure Rating		Each
20 to 12	2.205"	1.26"	0.669"	Plastic	Gray	Gel	IP08	0000000	000000

Twist-On Butt Splice Assortments

Keep multiple sizes on hand to splice any wiring in your facility. Insert wires end to end in the splice, then twist on the caps to lock the wire in place when vibrated and pulled.

	Includes	For Wire Construction	Terminal Material	Max. Temp., ° F	Max. Voltage	Container Type		Each
Nylon Insulation



	45	24 to 18 AWG Twist-On Butt Splices, Red (15) 16 to 14 AWG Twist-On Butt Splices, Blue (15) 12 to 10 AWG Twist-On Butt Splices, Yellow (15)	Stranded	Tin-Plated Brass	245	600V AC 600V DC	—	0000000	000000


	100	24 to 18 AWG Twist-On Butt Splices, Red (38) 16 to 14 AWG Twist-On Butt Splices, Blue (50) 12 to 10 AWG Twist-On Butt Splices, Yellow (12)	Stranded	Tin-Plated Brass	245	600V AC 600V DC	Compartmented Plastic Box	0000000	000000

Moisture-Resistant Twist-On Butt Splices

Unlike other twist-on butt splices, sealed end caps block out moisture and keep your wire dry and conductive. Insert wires end to end and lock them in place with the twist of a cap. These splices resist vibration and pulling to keep a secure connection between wires. Use them to speed up field installations without the use of crimping tools.

	For Wire
	Ga.	Construction	Lg.	Insulation Color	Terminal Material	Max. Temp., ° F	Max. Voltage, V AC	End Cap Construction	Pkg. Qty.		Pkg.
Nylon Insulation



		18	Stranded	1.2"	Red	Tin-Plated Brass	245	600	Sealed	4	0000000	000000


		16 to 14	Stranded	1.2"	Blue	Tin-Plated Brass	245	600	Sealed	4	0000000	00000
		12	Stranded	1.5"	Yellow	Tin-Plated Brass	245	600	Sealed	4	0000000	00000
		10	Stranded	1.5"	Green	Tin-Plated Brass	245	600	Sealed	4	0000000	00000

Tight-Hold Heat-Shrink Butt Splices

Fully Insulated

Solder Connection

Our strongest-gripping butt splices secure wire through heavy vibration and sharp tugs.

Polyolefin Insulation—The durable plastic maintains a tight grip on the wire so it stays put when pulled or vibrated.

	For Wire
	Ga.	Construction	Lg.	Insulation Color	Max. Temp., ° F	Max. Voltage	Shrink Temp., ° F	Certification	Pkg. Qty.		Pkg.
Polyolefin Insulation







				Solder Connection

				24 to 22	Solid, Stranded	0.88"	Clear	230	600V AC 600V DC	275	UL Recognized Component	10	0000000	000000


				22 to 18	Solid, Stranded	1.33"	Red	230	600V AC 600V DC	275	UL Recognized Component	10	0000000	00000
				16 to 14	Solid, Stranded	1.33"	Blue	230	600V AC 600V DC	275	UL Recognized Component	10	0000000	00000
				12 to 10	Stranded	1.33"	Yellow	230	600V AC 600V DC	275	UL Recognized Component	10	0000000	00000
				8	Solid, Stranded	1.64"	Pink	230	600V AC 600V DC	275	UL Recognized Component	5	0000000	00000

Quick-Connect Push-On Butt Splices

An economical alternative to our quick-connect clamp-on option, these splices are as quick to install but harder to adjust. Push wire into each end without the need for an installation tool. The splices have a test socket to safely test the voltage after installation.

	For Wire
	Ga.	Construction	Lg.	Insulation Color	Terminal Material	Max. Temp., ° F	Max. Voltage	No. of Test Sockets	Certification	Pkg. Qty.		Pkg.
Polycarbonate Insulation



		16 to 12 20 to 12	Stranded Solid	1"	Orange	Tin-Plated Copper	220	600V AC 600V DC	1	CSA Certified, UL Listed	10	0000000	00000

Underground Heat-Shrink Set Screw Butt Splices


Style A	Style B

Protect utility, irrigation, and other underground connections from groundwater, rocky soil, and mechanical stress. After tightening the set screws, slide the heavy-wall polyolefin tube onto the splice. Then, apply a heat gun to shrink the tube and completely seal out moisture and dirt.

		For Wire
	Style	No. of	Ga.	Construction	Material	For Cable Designation	Insulation Color	Terminal Material	Max. Temp., ° F	Max. Voltage, V AC	Shrink Temp., ° F	Certification		Each
Polyolefin Insulation



		A	2	8 to 2	Solid, Stranded	Aluminum, Copper	—	Black	Tin-Plated Aluminum	190	600	250	UL Listed	0000000	000000


		B	3	14 to 8	Solid, Stranded	Copper	UF	Black	Tin-Plated Copper	190	600	250	UL Listed	0000000	00000

Watertight Set Screw Butt Splices

End caps seal off the wire to keep your connection completely dry and conductive. Set screws cinch the wire without denting the body, so you can pop splices on and off for adjustments and reuse. For cable, attach each wire to its own set screw.

	For Wire
	No. of	Ga.	Construction	Material	Lg.	Insulation Color	Terminal Material	Max. Temp., ° F	Max. Voltage	Enclosure Rating	End Cap Construction		Each
Nylon Insulation



		4	18 to 14	Stranded	Aluminum, Copper	3.417"	Black	Nickel-Plated Brass	221	450V AC	IP68	Sealed	0000000	000000


		8	26 to 18	Stranded	Aluminum, Copper	2.83"	Black	Nickel-Plated Brass	185	130V AC 130V DC	IP68	Sealed	0000000	00000

Set Screw Butt Splices

These splices connect thicker wires than crimp-on butt splices—up to 1000 MCM. Tighten the set screw onto the wire instead of crushing the body, like you do with compression butt splices. That makes these splices reusable and easier to install.

PVC Cover—Completely cover the splice to protect wires from short circuits. The tip can be trimmed to fit your wire size. Cable ties cinch the cover onto the wire.

	For Wire
	Ga.	Construction	Material	Lg.	Insulation Color	Terminal Material	Max. Temp., ° F	Max. Voltage, V AC	Certification		Each
With PVC Cover



		14 to 2	Stranded	Aluminum, Copper	3.83"	Clear	Tin-Plated Aluminum	190	600	CSA Certified, UL Listed	000000	000000


		14 to 1/0	Stranded	Aluminum, Copper	4.8"	Clear	Tin-Plated Aluminum	190	600	CSA Certified, UL Listed	000000	00000
		10 to 350 MCM	Stranded	Aluminum, Copper	7.91"	Clear	Tin-Plated Aluminum	190	600	CSA Certified, UL Listed	000000	00000
		6 to 250 MCM	Stranded	Aluminum, Copper	7.91"	Clear	Tin-Plated Aluminum	190	600	CSA Certified, UL Listed	000000	00000


		Noninsulated



				14 to 2	Stranded	Aluminum, Copper	1.19"	—	Tin-Plated Aluminum	190	600	CSA Certified, UL Listed	0000000	0000


				14 to 1/0	Stranded	Aluminum, Copper	1.91"	—	Tin-Plated Aluminum	190	600	CSA Certified, UL Listed	0000000	00000
				10 to 350 MCM	Stranded	Aluminum, Copper	2.46"	—	Tin-Plated Aluminum	190	600	CSA Certified, UL Listed	0000000	00000
				6 to 250 MCM	Stranded	Aluminum, Copper	2.31"	—	Tin-Plated Aluminum	190	600	CSA Certified, UL Listed	0000000	00000
				4 to 500 MCM	Stranded	Aluminum, Copper	3.88"	—	Tin-Plated Aluminum	190	600	CSA Certified, UL Listed	0000000	00000
				250 to 750 MCM	Stranded	Aluminum, Copper	5.44"	—	Tin-Plated Aluminum	190	600	CSA Certified, UL Listed	0000000	00000
				500 to 1000 MCM	Stranded	Aluminum, Copper	8.69"	—	Tin-Plated Aluminum	190	600	CSA Certified, UL Listed	0000000	000000

Tight-Hold Butt Splices

Connect and secure wire that's frequently pulled, jostled, or vibrated. Insert your exposed wire ends in the splice, then pass a heat gun or butane torch over the body. When heated, the enclosed solder melts around the wire for a stronger, more rigid connection than unsoldered wire.

	For Wire
	Ga.	Construction	Lg.	Terminal Material	Max. Temp., ° F	Max. Voltage		Each
Noninsulated







				Solder Connection

				1/0	Solid, Stranded	2.5"	Tin-Plated Copper	900	600V AC 600V DC	0000000	000000


				2/0	Solid, Stranded	2.5"	Tin-Plated Copper	900	600V AC 600V DC	0000000	00000
				3/0	Solid, Stranded	2.5"	Tin-Plated Copper	900	600V AC 600V DC	0000000	00000
				4/0	Solid, Stranded	2.5"	Tin-Plated Copper	900	600V AC 600V DC	0000000	00000