Crimpless Butt Splices | McMaster-Carr

	For Wire Gauge For Wire Gauge

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250 MCM
300 MCM
350 MCM
400 MCM
450 MCM
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600 MCM
700 MCM
750 MCM
800 MCM
900 MCM
1000 MCM

	Wire Connection Type Wire Connection Type


Solder	Twist On

Screw-Clamp Terminals	Spring-Clamp Terminals

	Insulation Insulation


Fully Insulated	Noninsulated

	Color Color

	Red		Blue
	Orange		Clear
	Yellow		Green
	Pink		Black

	Maximum Voltage Maximum Voltage

	For Wire Type For Wire Type

	Stranded
	Solid

	Length Length

	Specifications Met Specifications Met

CSA

	For Wire Material For Wire Material

Copper

Aluminum

	Maximum Temperature Maximum Temperature

	Insulation Material Insulation Material

Polyolefin Plastic

Nylon Plastic

Polycarbonate Plastic

PVC Plastic

	Terminal Material Terminal Material

Brass

Copper

Aluminum

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	For Number of Wires For Number of Wires

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Terminal Finish Terminal Finish

Tin Plated

Nickel Plated

	Shrink Temperature Shrink Temperature

250° F

275° F

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Environment Environment

29 Products

Solder-Loaded Heat-Shrink No-Crimp Butt Splices

With a ring of solder on the inside, these heat-shrink splices create secure, water-resistant connections between wires without the need for a crimping tool. Instead, heat the splice with a heat gun or butane torch to shrink the tubing, seal the connection, and liquefy the solder.

Because they use solder, these splices make more reliable connections than crimp-on splices. The melted solder fills the gaps between the wires' strands to make the electrical connection. Made of a tin-bismuth alloy, it's safe to use where lead is prohibited. It has a lower melting point than lead, so you're less likely to melt the heat-shrink tubing before melting the solder.

A layer of hot-melt adhesive lines the inside of the heat-shrink tubing to prevent the wires from pulling apart. The adhesive also seals the connection, blocking out water, dust, and other contaminants that can corrode the wire and cause a short.

To help with identification, each size has a different color. All are UL recognized for use with other components in an electrical system. When used with other UL recognized components, such as wires of the correct gauge, they can be part of a UL listed final product.

For Wire Gauge	Lg.	Color	Insulation Material	Shrink Temperature, °F	Max. Voltage	Max. Temperature, °F	Pkg. Qty.		Pkg.
24-22	0.88"	Clear	Polyolefin Plastic	275°	600V AC 600V DC	230°	10	0000000	000000
22-18	1.33"	Red	Polyolefin Plastic	275°	600V AC 600V DC	230°	10	0000000	00000
16-14	1.33"	Blue	Polyolefin Plastic	275°	600V AC 600V DC	230°	10	0000000	00000
12-10	1.33"	Yellow	Polyolefin Plastic	275°	600V AC 600V DC	230°	10	0000000	00000
8	1.64"	Pink	Polyolefin Plastic	275°	600V AC 600V DC	230°	5	0000000	00000

Weather-Resistant Twist-On No-Crimp Butt Splices

Sealed threads make these splices weather resistant. Insert wires and twist on the threaded end caps. The caps lock wires into place, making these splices a good choice for high-vibration applications. Convenient for field installation, they allow you to install wire quickly without the need for crimping tools.

For technical drawings and 3-D models, click on a part number.

For Wire Gauge	Lg.	Color	For Wire Type	Insulation Material	Terminal Material	Max. Voltage	Max. Temperature, °F	Features	Pkg. Qty.		Pkg.
18	1.1"	Red	Stranded	Nylon Plastic	Tin-Plated Brass	600V AC	245°	Sealed Threads	4	0000000	000000
16-14	1.5"	Blue	Stranded	Nylon Plastic	Tin-Plated Brass	600V AC	245°	Sealed Threads	4	0000000	00000
12	1.5"	Yellow	Stranded	Nylon Plastic	Tin-Plated Brass	600V AC	245°	Sealed Threads	4	0000000	00000
10	1.7"	Green	Stranded	Nylon Plastic	Tin-Plated Brass	600V AC	245°	Sealed Threads	4	0000000	00000

Twist-On No-Crimp Butt Splices

Insert wires and twist on the threaded end caps. The caps lock wires into place, making these splices a good choice for high-vibration applications. Convenient for field installation, they allow you to install wire quickly without the need for crimping tools.

For technical drawings and 3-D models, click on a part number.

For Wire Gauge	Lg.	Color	For Wire Type	Insulation Material	Terminal Material	Max. Voltage	Max. Temperature, °F	Specifications Met	Pkg. Qty.		Pkg.
24-18	1.1"	Red	Stranded	Nylon Plastic	Tin-Plated Brass	600V AC	245°	UL Listed	9	000000	000000
16-14	1.1"	Blue	Stranded	Nylon Plastic	Tin-Plated Brass	600V AC	245°	UL Listed	9	0000000	00000
12-10	1.5"	Yellow	Stranded	Nylon Plastic	Tin-Plated Brass	600V AC	245°	UL Listed	7	0000000	00000
8-6	1.7"	Green	Stranded	Nylon Plastic	Tin-Plated Brass	600V AC	245°	UL Listed	6	0000000	00000

Push-On No-Crimp Butt Splices

Push wire into each end of these splices to make a connection. Convenient for field installations, they allow you to install wire quickly without the need for crimping tools.

For technical drawings and 3-D models, click on a part number.

For Wire Gauge	For Wire Type	Lg.	Color	Insulation Material	Terminal Material	Max. Voltage	Max. Temperature, °F	Specifications Met	Pkg. Qty.		Pkg.
20-12	Solid	1"	Orange	Polycarbonate Plastic	Tin-Plated Copper	600V AC 600V DC	220°	UL Listed, CSA Certified	10	0000000	00000

Noninsulated Screw-Down Butt Splices

Tighten the screws to connect wires.

For technical drawings and 3-D models, click on a part number.

For Wire Gauge	Lg.	For Wire Material	Terminal Material	Max. Voltage	Max. Temperature, °F	Specifications Met		Each
14-2	1.19"	Aluminum, Copper	Tin-Plated Aluminum	600V AC	190°	UL Listed, CSA Certified	0000000	00000
14-1/0	1.91"	Aluminum, Copper	Tin-Plated Aluminum	600V AC	190°	UL Listed, CSA Certified	0000000	0000
4-500 MCM	3.88"	Aluminum, Copper	Tin-Plated Aluminum	600V AC	190°	UL Listed, CSA Certified	0000000	00000
6-250 MCM	2.31"	Aluminum, Copper	Tin-Plated Aluminum	600V AC	190°	UL Listed, CSA Certified	0000000	00000
10-350 MCM	2.46"	Aluminum, Copper	Tin-Plated Aluminum	600V AC	190°	UL Listed, CSA Certified	0000000	00000
250-750 MCM	5.44"	Aluminum, Copper	Tin-Plated Aluminum	600V AC	190°	UL Listed, CSA Certified	0000000	000000
500-1000 MCM	8.69"	Aluminum, Copper	Tin-Plated Aluminum	600V AC	190°	UL Listed, CSA Certified	0000000	000000

Insulated Screw-Down Butt Splices

A plastic cover fully insulates these splices and it's clear so you can visually confirm the connection. The tip can be trimmed to fit wire size. Wings on the cover have holes so that you can use the included cable tie to secure the cover to the wire. Tighten the screws to connect wires.

For technical drawings and 3-D models, click on a part number.

For Wire Gauge	Lg.	Color	For Wire Material	Insulation Material	Terminal Material	Max. Voltage	Max. Temperature, °F	Specifications Met		Each
14-2	3.83"	Clear	Aluminum, Copper	PVC Plastic	Tin-Plated Aluminum	600V AC	190°	UL Listed, CSA Certified	000000	000000
14-1/0	4.8"	Clear	Aluminum, Copper	PVC Plastic	Tin-Plated Aluminum	600V AC	190°	UL Listed, CSA Certified	000000	00000
10-350 MCM	7.91"	Clear	Aluminum, Copper	PVC Plastic	Tin-Plated Aluminum	600V AC	190°	UL Listed, CSA Certified	000000	00000
6-250 MCM	7.91"	Clear	Aluminum, Copper	PVC Plastic	Tin-Plated Aluminum	600V AC	190°	UL Listed, CSA Certified	000000	00000

Underground Heat-Shrink Screw-Down Butt Splices

For 1 Wire

For 3 Wires/UF Cable

Make watertight connections for underground applications. These splices are abrasion-resistant and can withstand burial in rocky soil. They come with a length of heavy-wall polyolefin heat-shrink tubing that fits over the splice. Tighten the screws to connect wires.

For Number of Wires	For Cable Industry Designation	For Number of Ground Wires	For Wire Gauge	For Wire Type	For Wire Material	Insulation Material	Terminal Material	Shrink Temperature, °F	Max. Voltage	Max. Temperature, °F	Specifications Met	Includes		Each
1	__	__	8-2	Solid, Stranded	Aluminum, Copper	Polyolefin Plastic	Tin-Plated Aluminum	250°	600V AC	190°	UL Listed	2" and 5" lengths of heat-shrink tubing	0000000	000000
3	UF	1	14-8	Solid, Stranded	Copper	Polyolefin Plastic	Tin-Plated Copper	250°	600V AC	190°	UL Listed	8" length of heat-shrink tubing	0000000	00000

Harsh-Environment Screw-Down Butt Splices

Splice for Four Wires

Splice for Eight Wires

Join wires and cables in some of the dirtiest and wettest locations—from paper mills to marine environments—without special tools. With a nylon body and gasketed end caps, these splices are IP68 rated to seal out dust and water even if briefly submersed. To install, insert wire into either side, tighten the screws with a slotted screwdriver, and twist on the end caps to seal. They have multiple terminals, so you can repair, extend, and reconfigure cables with multiple wires.

For technical drawings and 3-D models, click on a part number.

For Number of Wires	For Wire Gauge	Lg.	Color	For Wire Type	For Wire Material	Insulation Material	Terminal Material	Max. Voltage	Max. Temp., °F		Each
4	26-14	2.83"	Black	Stranded	Aluminum, Copper	Nylon Plastic	Nickel-Plated Brass	450V AC 450V DC	185°	0000000	000000
8	26-18	2.83"	Black	Stranded	Aluminum, Copper	Nylon Plastic	Nickel-Plated Brass	130V DC 130V AC	185°	0000000	00000