Heat Shrink Connectors | McMaster-Carr

	For Wire Gauge For Wire Gauge

26
25
24
23
22
21
20
19
18
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2

	Type Type

Splice

Terminal

	Splice Type Splice Type


Butt	Multi-Way

	Color Color

Blue

Blue with Blue Stripe and Red
Stripe

Clear

Clear with Blue and Yellow
Dashes

Clear with Red and Blue
Dashes

Clear with White and Red
Dashes

Clear with Yellow and Red
Dashes

Pink

Pink with Pink Stripe and
Yellow Stripe

Red

Red with Red Stripe and
White Stripe

Yellow

Yellow with Yellow Stripe and
Blue Stripe

	Wire Connection Type Wire Connection Type


Crimp On	Solder

Screw-Clamp Terminals

	Insulation Insulation


Fully Insulated	Barrel Insulated

	For Number of Wires For Number of Wires

	Maximum Voltage Maximum Voltage

	Insulation Material Insulation Material

	Number of Pieces Number of Pieces

	Length Length

	Shrink Temperature Shrink Temperature

	Maximum Temperature Maximum Temperature

	Specifications Met Specifications Met

CSA

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

RoHS Compliant

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

DFARS Specialty Metals
COTS-Exempt

	Terminal Material Terminal Material

Copper

Aluminum

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

REACH Compliant

	For Wire Type For Wire Type

	Stranded
	Solid

	Stripe Color Stripe Color

	Red
	Blue
	Yellow

	For Wire Material For Wire Material

55 Products

Heat-Shrink Crimp-On Butt Splices

When heat is applied, adhesive-lined insulation shrinks and bonds to wires, creating a moisture- and corrosion-resistant seal.

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

For Wire Gauge	Lg.	Color	Insulation Material	Terminal Material	Shrink Temperature, °F	Max. Voltage	Max. Temperature, °F	Specifications Met	Pkg. Qty.		Pkg.
26-22	1.1"	Clear	Polyolefin Plastic	Tin-Plated Copper	195°	600V AC	220°	UL Listed, C-UL Listed	10	0000000	00000
22-18	1.6"	Red	Nylon Plastic	Tin-Plated Copper	195°	600V AC 600V DC	220°	UL Listed, CSA Certified	10	0000000	00000
16-14	1.6"	Blue	Nylon Plastic	Tin-Plated Copper	195°	600V AC 600V DC	220°	UL Listed, CSA Certified	10	0000000	00000
12-10	1.8"	Yellow	Nylon Plastic	Tin-Plated Copper	195°	600V AC 600V DC	220°	UL Listed, CSA Certified	10	0000000	00000
8	2.1"	Red	Nylon Plastic	Tin-Plated Copper	195°	600V AC 600V DC	220°	UL Listed, CSA Certified	5	0000000	00000

Solder-Loaded Heat-Shrink Crimp-On Butt Splices

The most secure, electrically conductive, and environmentally sealed connection we offer, these splices have enclosed solder and an adhesive-lined insulation that melt when heat is applied. They protect against moisture and corrosion.

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

For Wire Gauge	Lg.	Color	Insulation Material	Terminal Material	Shrink Temperature, °F	Max. Voltage	Max. Temperature, °F	Pkg. Qty.		Pkg.
24-22	0.88"	Clear	Polyolefin Plastic	Tin-Plated Copper	275°	600V AC 600V DC	220°	10	0000000	000000
22-18	1.33"	Red	Polyolefin Plastic	Tin-Plated Copper	275°	600V AC 600V DC	220°	10	0000000	00000
16-14	1.33"	Blue	Polyolefin Plastic	Tin-Plated Copper	275°	600V AC 600V DC	220°	10	0000000	00000
12-10	1.33"	Yellow	Polyolefin Plastic	Tin-Plated Copper	275°	600V AC 600V DC	220°	10	0000000	00000

Heat-Shrink Crimp-On Butt Splices with Inspection Window

When heat is applied, adhesive-lined insulation shrinks and bonds to the wires, creating a watertight seal. The insulation has an inspection window that allows you to visually confirm your connection.

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

For Wire Gauge	Lg.	Color	Insulation Material	Terminal Material	Shrink Temperature, °F	Max. Voltage	Max. Temperature, °F	Pkg. Qty.		Pkg.
22-18	1.5"	Clear with Red Stripe	Polyolefin Plastic	Tin-Plated Copper	195°	600V AC 600V DC	255°	10	0000000	00000
16-14	1.5"	Clear with Blue Stripe	Polyolefin Plastic	Tin-Plated Copper	195°	600V AC 600V DC	255°	10	0000000	0000
12-10	1.6"	Clear with Yellow Stripe	Polyolefin Plastic	Tin-Plated Copper	195°	600V AC 600V DC	255°	10	0000000	00000

Sealed Moisture-Resistant Crimp-On Butt Splices

These splices are filled with a sealant that creates a barrier to completely keep out moisture when splices are crimped. They are faster to install than heat-shrink splices and are more suitable for use in spaces where heat can damage equipment.

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

For Wire Gauge	Lg.	Color	Insulation Material	Terminal Material	Max. Voltage	Max. Temperature, °F	Pkg. Qty.		Pkg.
22-18	1.1"	Red	Nylon Plastic	Tin-Plated Copper	600V DC	220°	10	0000000	000000
16-14	1"	Blue	Nylon Plastic	Tin-Plated Copper	600V DC	220°	10	0000000	00000
12-10	1.2"	Yellow	Nylon Plastic	Tin-Plated Copper	600V DC	220°	10	0000000	00000

Moisture-Resistant Crimp-On Butt Splices

Filled with grease, these splices resist moisture and corrosion. They have a nylon cover that provides electrical insulation.

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

For Wire Gauge	Lg.	Color	Insulation Material	Terminal Material	Max. Voltage	Max. Temperature, °F	Pkg. Qty.		Pkg.
22-18	1"	Red	Nylon Plastic	Tin-Plated Copper	600V AC	220°	10	0000000	000000
16-14	1.1"	Blue	Nylon Plastic	Tin-Plated Copper	600V AC	220°	10	0000000	00000
12-10	1.2"	Yellow	Nylon Plastic	Tin-Plated Copper	600V AC	220°	10	0000000	00000

Insulated Crimp-On Butt Splices

A plastic cover fully insulates these splices.

Nylon-insulated splices are more durable than vinyl insulated.

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

Vinyl Plastic Insulation
For Wire Gauge	Lg.	Color	Terminal Material	Max. Voltage	Max. Temperature, °F	Specifications Met	Pkg. Qty.		Pkg.
22-18	1"	Red	Tin-Plated Copper	600V AC	220°	UL Listed, CSA Certified	100	0000000	000000
16-14	1"	Blue	Tin-Plated Copper	600V AC	220°	UL Listed, CSA Certified	100	0000000	00000
12-10	1"	Yellow	Tin-Plated Copper	600V AC	220°	UL Listed, CSA Certified	50	0000000	00000
Nylon Plastic Insulation
26-22	0.9"	Yellow	Tin-Plated Copper	300V DC 300V AC	220°	UL Listed, CSA Certified	5	0000000	00000
22-18	1.1"	Red	Tin-Plated Copper	600V AC	220°	UL Listed, CSA Certified	50	0000000	00000
16-14	1.1"	Blue	Tin-Plated Copper	600V AC	220°	UL Listed, CSA Certified	50	0000000	00000
12-10	1.1"	Yellow	Tin-Plated Copper	600V AC	220°	UL Listed	50	0000000	00000
8	1.4"	Red	Tin-Plated Copper	300V DC 300V AC	220°	UL Listed, CSA Certified	10	0000000	00000
6	1.8"	Blue	Tin-Plated Copper	300V DC 300V AC	220°	UL Listed, CSA Certified	10	0000000	00000
4	2"	Yellow	Tin-Plated Copper	300V DC 300V AC	220°	UL Listed, CSA Certified	10	0000000	00000

Solder-Loaded Heat-Shrink Reducing Crimp-On Butt Splices

Create a water- and corrosion-resistant seal while connecting two different sizes of wire. When these splices are heated, the solder inside melts and the adhesive liner shrinks and bonds to form the seal. Because of this seal, these splices are the most secure, electrically conductive splices we offer that connect two different sizes of wire. All have a stripe on the smaller end that’s a different color than the body, so you can easily match your wire to the right connector.

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

For Wire Gauge	Length	Color	Insulation Material	Terminal Material	Shrink Temperature, °F	Maximum Voltage	Maximum Temperature, °F	Pkg. Qty.		Pkg.
22-18 to 26-22	1.5"	Red with Red Stripe and White Stripe	Polyolefin Plastic	Tin-Plated Copper	275°	600V AC 600V DC	230°	10	0000000	000000
16-14 to 22-18	1.5"	Blue with Blue Stripe and Red Stripe	Polyolefin Plastic	Tin-Plated Copper	275°	600V AC 600V DC	230°	10	0000000	00000
12-10 to 16-14	1.5"	Yellow with Yellow Stripe and Blue Stripe	Polyolefin Plastic	Tin-Plated Copper	275°	600V AC 600V DC	230°	10	0000000	00000
8 to 12-10	1.75"	Pink with Pink Stripe and Yellow Stripe	Polyolefin Plastic	Tin-Plated Copper	275°	600V AC 600V DC	230°	10	0000000	00000

Heat-Shrink Reducing Crimp-On Butt Splices

When heat is applied, adhesive-lined insulation shrinks and bonds to the wires, creating a watertight seal. Use these splices to connect two wires of different sizes—one end of the splice is larger than the other. They are color-coded according to the larger wire gauge size and have a colored stripe to indicate the size of the smaller end.

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

For Wire Gauge	Lg.	Color	Insulation Material	Terminal Material	Shrink Temperature, °F	Max. Voltage	Max. Temperature, °F	Pkg. Qty.		Pkg.
16-14 to 22-18	1.6"	Blue with Red Stripe	Nylon Plastic	Tin-Plated Copper	195°	600V AC 600V DC	220°	10	0000000	000000
12-10 to 16-14	1.8"	Yellow with Blue Stripe	Nylon Plastic	Tin-Plated Copper	195°	600V AC 600V DC	220°	5	0000000	00000
8 to 12-10	1.8"	Red with Red and Yellow Stripe	Polyolefin Plastic	Tin-Plated Copper	195°	600V AC	220°	10	0000000	00000

Insulated Reducing Crimp-On Butt Splices

A plastic cover fully insulates these splices. Use them to connect two wires of different sizes—one end of the splice is larger than the other. They are color-coded according to the larger wire gauge size and have a colored stripe to indicate the size of the smaller end.

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

For Wire Gauge	Lg.	Color	Insulation Material	Terminal Material	Max. Voltage	Max. Temperature, °F	Pkg. Qty.		Pkg.
16-14 to 22-18	1.1"	Blue with Red Stripe	Vinyl Plastic	Tin-Plated Copper	600V DC	220°	10	0000000	000000
12-10 to 16-14	1.3"	Yellow with Blue Stripe	Vinyl Plastic	Tin-Plated Copper	600V DC	220°	10	0000000	00000
8 to 12-10	1.5"	Red with Yellow Stripe	Vinyl Plastic	Tin-Plated Copper	600V DC	220°	10	0000000	00000
6 to 8	1.8"	Blue with Red Stripe	Vinyl Plastic	Tin-Plated Copper	600V DC	220°	5	0000000	00000

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

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

Heat-Shrink 3-Way Splices

When heat is applied, adhesive-lined insulation shrinks and bonds to the wires, creating a moisture- and corrosion-resistant seal. Use a single splice to connect multiple wires.

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

For Wire Gauge	Color	Insulation Material	Terminal Material	Shrink Temperature, °F	Max. Voltage	Max. Temperature, °F	Pkg. Qty.		Pkg.
22-18	Red	Plastic Blend	Tin-Plated Copper	195°	600V AC 600V DC	220°	5	00000000	000000
16-14	Blue	Plastic Blend	Tin-Plated Copper	195°	600V AC 600V DC	220°	5	00000000	00000
12-10	Yellow	Plastic Blend	Tin-Plated Copper	195°	600V AC 600V DC	220°	5	00000000	00000

Multi-Way Heat-Shrink Crimp-On Butt Splices

Connect one wire to two wires of the same size. When heat is applied, adhesive-lined insulation shrinks and bonds to the wires, creating a moisture- and corrosion-resistant seal.

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

For Wire Gauge	Lg.	Color	For Wire Type	Insulation Material	Terminal Material	Shrink Temperature, °F	Max. Voltage	Max. Temperature, °F	Features	Pkg. Qty.		Pkg.
24-22	1.8"	Clear with White and Red Dashes	Stranded	Polyolefin Plastic	Tin-Plated Copper	250°	600V AC 600V DC	250°	Inspection Window	10	0000000	000000
22-18	2.1"	Clear with Red and Blue Dashes	Stranded	Polyolefin Plastic	Tin-Plated Copper	250°	600V AC 600V DC	250°	Inspection Window	10	0000000	00000
16-14	2.4"	Clear with Blue and Yellow Dashes	Stranded	Polyolefin Plastic	Tin-Plated Copper	250°	600V AC 600V DC	250°	Inspection Window	5	0000000	0000
12-10	2.6"	Clear with Yellow and Red Dashes	Stranded	Polyolefin Plastic	Tin-Plated Copper	250°	600V AC 600V DC	250°	Inspection Window	5	0000000	00000

Terminal and Splice Assortments

Use the included crimping tool to install a variety of terminals and butt splices.

Fully Insulated with Adhesive Heat Shrink Liner Material

Number of Pieces	Includes	Insulation Material	Shrink Temperature, °F	Max. Voltage	Max. Temperature, °F	Specifications Met		Each
50	Crimping Tool Butt Splices (22-18 AWG, 16-14 AWG, and 12-10 AWG) Plastic Case	Polyolefin Plastic	270°	600V DC	220°	UL Listed	00000000	0000000
80	Crimping Tool Ring Terminals (22-10 AWG) Spade Terminals (16-14 AWG) Male and Female Quick-Disconnect Terminals (16-14 AWG; not UL Listed) Butt Splices (22-10 AWG) Plastic Case	Polyolefin Plastic	270°	600V DC	220°	UL Listed	00000000	00000