Twist-On Terminals | McMaster-Carr

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For Wire Gauge

Color

Wire Splicing Connector Type

Wire Construction

Maximum Wire Combination

Five 12-Ga. Wires

Four 10-Ga. Wires

Four 12-Ga. Wires

Four 14-Ga. Wires with One 18-Ga. Wire

Four 16-Ga. Wires

One 6-Ga. Wire with One 8-Ga. Wire

One 6-Ga. Wire with Two 8-Ga. Wires

One 8-Ga. Wire with One 12-Ga. Wire

Three 10-Ga. Wires

Three 10-Ga. Wires with One 18-Ga. Wire

Three 12-Ga. Wires

Three 14-Ga. Wires

Three 14-Ga. Wires with Two 18-Ga. Wires

Three 16-Ga. Wires

Two 6-Ga. Wires

Minimum Wire Combination

Four 14-Ga. Wires

Four 18-Ga. Wires

One 8-Ga. Wire with One 14-Ga. Wire

One 14-Ga. Wire with One 20-Ga. Wire

One 16-Ga. Wire with Three 18-Ga. Wires

One 18-Ga. Wire with One 20-Ga. Wire

One 20-Ga. Wire with One 22-Ga. Wire

Three 12-Ga. Wires

Three 14-Ga. Wires

Three 16-Ga. Wires with One 22-Ga. Wire

Insulation

Insulation Material

Tap Wire Gauge (AWG)

Wire Splice Type

Wire Material

Maximum Temperature

Certification

Number of Pieces

Terminal Material

RoHS

Terminal Finish

REACH

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

Length

UL File Number

Maximum Underground Voltage

30V AC

30V DC

Tap Wire Construction

66 Products

Twist-On Wire Splicing Connectors

Make a quick, secure wire connection without crimping.

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

For Wire Gauge	Min. Wire Combination	Max. Wire Combination	Color	For Wire Type	Insulation Material	Terminal Material	Max. Voltage	Max. Temp., °F	Specifications Met	Pkg. Qty.		Pkg.
22-16	Two 22-ga. Wires	Two 16-ga. Wires	Gray	Stranded	Polypropylene Plastic	Zinc-Plated Steel	300V DC 300V AC	220°	UL Listed, CSA Certified	100	0000000	000000
22-14	Two 22-ga. Wires	Three 16-ga. Wires	Blue	Stranded	Polypropylene Plastic	Zinc-Plated Steel	300V DC 300V AC	220°	UL Listed, CSA Certified	100	0000000	00000
22-14	One 18-ga. Wire with One 20-ga. Wire	Two 14-ga. Wires	Orange	Stranded	Polypropylene Plastic	Zinc-Plated Steel	600V AC 600V DC	220°	UL Listed, CSA Certified	100	000000	00000
18-12	Two 18-ga. Wires	Four 14-ga. Wires with One 18-ga. Wire	Yellow	Stranded	Polypropylene Plastic	Zinc-Plated Steel	600V AC 600V DC	220°	UL Listed, CSA Certified	100	000000	00000
18-6	Two 14-ga. Wires	Four 12-ga. Wires	Red	Stranded	Polypropylene Plastic	Zinc-Plated Steel	600V AC 600V DC	220°	UL Listed, CSA Certified	100	000000	00000

Space-Saver Twist-On Wire Splicing Connectors

Suitable for use in tight spaces, these connectors have a narrow profile that takes up less space than standard wire splicing connectors. Use them to make quick, secure wire connections without crimping.

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

For Wire Gauge	Min. Wire Combination	Max. Wire Combination	Color	For Wire Type	Insulation Material	Terminal Material	Max. Voltage	Max. Temperature, °F	Specifications Met	Pkg. Qty.		Pkg.
22-10	Three 20-ga. Wires	Three 12-ga. Wires	Yellow	Solid, Stranded	Nylon Plastic	Zinc-Plated Steel	600V AC 600V DC	220°	UL Listed, CSA Certified	100	0000000	000000
22-8	Two 18-ga. Wires	Five 12-ga. Wires	Red	Solid, Stranded	Nylon Plastic	Zinc-Plated Steel	600V AC 600V DC	220°	UL Listed, CSA Certified	100	0000000	00000
14-6	Three 12-ga. Wires	Two 6-ga. Wires	Blue	Solid, Stranded	Polypropylene Plastic	Copper-Plated Copper	600V AC 600V DC	220°	UL Listed, CSA Certified	50	0000000	00000

Ultra-High Temperature Twist-On Wire Splicing Connectors

Made of porcelain, these connectors can withstand temperatures up to 1200° F. Use them to make quick, secure wire connections without crimping.

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

For Wire Gauge	Min. Wire Combination	Max. Wire Combination	Color	For Wire Type	Insulation Material	Terminal Material	Max. Voltage	Max. Temperature, °F	Specifications Met	Pkg. Qty.		Pkg.
18-14	Two 18-ga. Wires	Two 16-ga. Wires with One 18-ga. Wire	White	Stranded	Porcelain	Porcelain	300V DC 300V AC	1200°	UL Listed, CSA Certified	10	000000	000000
18-14	Two 18-ga. Wires	Two 16-ga. Wires with Two 18-ga. Wires	White	Stranded	Porcelain	Porcelain	300V DC 300V AC	1200°	UL Listed, CSA Certified	10	000000	00000
18-14	Two 18-ga. Wires	Four 16-ga. Wires	White	Stranded	Porcelain	Porcelain	300V DC 300V AC	1200°	UL Listed, CSA Certified	10	000000	00000

High Temperature Twist-On Wire Splicing Connectors

Shown With Set Screw

Rated to 300° F, these connectors are an excellent choice for use in high-temperature applications such as HID lighting and electric heat. Use them to make quick, secure wire connections without crimping.

Connectors with a set screw have an inner barrel with a set screw that firmly holds wires to provide a secure grip in high-vibration applications.

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

For Wire Gauge	Min. Wire Combination	Max. Wire Combination	For Wire Type	Color	Insulation Material	Terminal Material	Max. Voltage	Max. Temperature, °F	Specifications Met	Features	Pkg. Qty.		Pkg.
22-16	Two 22-ga. Wires	Two 16-ga. Wires	Solid, Stranded	Black	Thermoplastic Rubber Blend	Zinc-Plated Steel	300V AC 300V DC	300°	UL Listed, CSA Certified	__	100	0000000	000000
22-14	Two 22-ga. Wires	Three 16-ga. Wires	Solid, Stranded	Black	Thermoplastic Rubber Blend	Zinc-Plated Steel	300V AC 300V DC	300°	UL Listed, CSA Certified	__	100	0000000	00000
22-14	One 18-ga. Wire with One 20-ga. Wire	Two 14-ga. Wires	Solid, Stranded	Black	Thermoplastic Rubber Blend	Zinc-Plated Steel	300V AC 300V DC	300°	UL Listed, CSA Certified	__	100	000000	00000
22-12	Two 20-ga. Wires	Three 14-ga. Wires	Solid, Stranded	Black	Thermoplastic Rubber Blend	Zinc-Plated Steel	600V AC 600V DC	300°	UL Listed, CSA Certified	__	100	000000	00000
22-10	One 20-ga. Wire with One 22-ga. Wire	Two 14-ga. Wires with One 16-ga. Wire	Solid, Stranded	Black	Polybutylene/Polycarbonate Plastic Blend	Brass	300V AC 300V DC	300°	UL Listed, CSA Certified	Set Screw	10	0000000	00000
22-10	One 14-ga. Wire with One 20-ga. Wire	Three 14-ga. Wires with Two 18-ga. Wires	Solid, Stranded	Black	Polybutylene/Polycarbonate Plastic Blend	Brass	600V AC 600V DC	300°	UL Listed, CSA Certified	Set Screw	10	0000000	00000
20-10	One 16-ga. Wire with Three 18-ga. Wires	Two 10-ga. Wires with One 12-ga. Wire	Solid, Stranded	Black	Polybutylene/Polycarbonate Plastic Blend	Brass	600V AC 600V DC	300°	UL Listed, CSA Certified	Set Screw	10	0000000	00000

Watertight Twist-On Wire Splicing Connectors

Filled with silicone, these connectors seal out moisture and prevent corrosion. There’s no crimping since you twist to connect wire by hand, so these connectors are good for jobs where you don’t want to carry around a lot of tools.

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

For Wire Gauge	Min. Wire Combination	Max. Wire Combination	For Wire Type	Color	Insulation Material	Terminal Material	Max. Voltage	Max. Temperature, °F	Specifications Met	Features	Pkg. Qty.		Pkg.
22-12	Two 20-ga. Wires with One 22-ga. Wire	Two 14-ga. Wires with One 18-ga. Wire	Solid, Stranded	Blue, Orange	Nylon Plastic	Steel	600V AC 600V DC	220°	UL Listed	Silicone Filled	6	0000000	00000
22-8	Three 16-ga. Wires with One 22-ga. Wire	Three 10-ga. Wires with One 18-ga. Wire	Solid, Stranded	Blue, Red	Nylon Plastic	Steel	600V AC 600V DC	220°	UL Listed	Silicone Filled	5	0000000	0000
14-6	One 8-ga. Wire with One 14-ga. Wire	Two 6-ga. Wires with One 10-ga. Wire	Solid, Stranded	Blue	Nylon Plastic	Steel	600V AC 600V DC	220°	UL Listed	Silicone Filled	3	0000000	0000

Underground Twist-On Wire Splicing Connectors

Make quick, watertight connections for underground applications without any crimping. These connectors are filled with silicone, so they seal out moisture and prevent corrosion. Because you twist to connect wire by hand, they're ideal for jobs where you don’t want to carry around a lot of tools.

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

For Wire Gauge	Min. Wire Combination	Max. Wire Combination	For Wire Type	Color	Insulation Material	Terminal Material	Max. Underground Voltage	Max. Voltage	Max. Temp., °F	Specifications Met	Pkg. Qty.		Pkg.
22-12	Two 20-ga. Wires with One 22-ga. Wire	Two 14-ga. Wires with One 18-ga. Wire	Solid, Stranded	Gray	Polypropylene Plastic	Zinc-Plated Steel	30V AC 30V DC	600V AC	220°	UL Listed, CSA Certified	20	00000000	000000
22-8	Three 16-ga. Wires with One 22-ga. Wire	One 8-ga. Wire with One 12-ga. Wire	Solid, Stranded	Light Blue	Polypropylene Plastic	Zinc-Plated Steel	30V AC 30V DC	600V AC	220°	UL Listed, CSA Certified	2	00000000	0000
20-12	Three 20-ga. Wires	Three 12-ga. Wires	Solid, Stranded	Dark Blue	Polypropylene Plastic	Zinc-Plated Steel	30V AC 30V DC	600V AC	220°	UL Listed	20	00000000	00000
18-10	Four 18-ga. Wires	Three 10-ga. Wires	Solid, Stranded	Yellow	Polypropylene Plastic	Zinc-Plated Steel	30V AC 30V DC	600V AC	220°	UL Listed, CSA Certified	10	00000000	00000
14-10	Two 14-ga. Wires	Two 10-ga. Wires with Two 14-ga. Wires	Solid, Stranded	Red	Polypropylene Plastic	Zinc-Plated Steel	30V AC 30V DC	600V AC	220°	UL Listed, CSA Certified	10	00000000	00000
14-6	Four 14-ga. Wires	One 6-ga. Wire with One 8-ga. Wire	Solid, Stranded	Dark Blue	Polypropylene Plastic	Zinc-Plated Steel	30V AC 30V DC	600V AC	220°	UL Listed, CSA Certified	2	00000000	0000

Easy-Grip Twist-On Wire Splicing Connectors

Grip the wings on these connectors to increase leverage when tightening. Use them to make quick, secure wire connections without crimping.

Grounding connectors have a hole in the top that allows a single ground wire through while multiple wires remain connected inside.

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

For Wire Gauge	Min. Wire Combination	Max. Wire Combination	For Wire Material	For Wire Type	Color	Insulation Material	Terminal Material	Max. Voltage	Max. Temperature, °F	Specifications Met	Features	Pkg. Qty.		Pkg.
22-8	Three 22-ga. Wires	Three 10-ga. Wires	Copper	Solid, Stranded	Beige	Polypropylene Plastic	Zinc-Plated Steel	600V AC 600V DC	220°	UL Listed, CSA Certified	__	100	0000000	000000
18-10	Two 18-ga. Wires	Three 12-ga. Wires	Aluminum, Copper	Solid, Stranded	Purple	Polypropylene Plastic	Zinc-Plated Steel	600V AC 600V DC	220°	UL Listed, CSA Certified	__	2	0000000	00000
18-10	Two 18-ga. Wires	Three 12-ga. Wires	Copper	Solid, Stranded	Yellow	Polypropylene Plastic	Zinc-Plated Steel	600V AC 600V DC	220°	UL Listed, CSA Certified	__	100	0000000	00000
18-8	Two 18-ga. Wires	Four 10-ga. Wires	Copper	Solid, Stranded	Red	Polypropylene Plastic	Zinc-Plated Steel	600V AC 600V DC	220°	UL Listed, CSA Certified	__	100	0000000	00000
18-6	Three 14-ga. Wires	Two 8-ga. Wires with Two 12-ga. Wires	Copper	Solid, Stranded	Gray	Polypropylene Plastic	Zinc-Plated Steel	600V AC 600V DC	220°	UL Listed, CSA Certified	__	50	00000000	00000
14-10	Three 14-ga. Wires	Five 12-ga. Wires	Copper	Solid, Stranded	Green	Polypropylene Plastic	Tin-Plated Steel	Not Rated	220°	UL Listed	Grounding	100	00000000	00000
14-6	Three 12-ga. Wires	One 6-ga. Wire with Two 8-ga. Wires	Copper	Solid, Stranded	Blue	Polypropylene Plastic	Zinc-Plated Steel	600V AC 600V DC	220°	UL Listed, CSA Certified	__	25	0000000	00000

Wide-Range Easy-Grip Twist-On Wire Splicing Connectors

Large enough to be used with a wide range of wire sizes, these connectors can still fit into cramped outlet boxes. The rigid plastic top protects the connection and the flexible bottom skirt allows them to conform to tight spaces. These connectors make quick, secure wire connections without crimping. Grip the wings to increase leverage when tightening.

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

For Wire Gauge	Min. Wire Combination	Max. Wire Combination	Color	For Wire Type	Insulation Material	Terminal Material	Max. Voltage	Max. Temperature, °F	Specifications Met	Pkg. Qty.		Pkg.
22-12	Two 22-ga. Wires	Two 12-ga. Wires	Blue and Orange	Solid, Stranded	Polypropylene Plastic/Rubber Blend	Tin-Plated Steel	600V AC	220°	UL Listed, CSA Certified, CE Marked	25	0000000	00000
18-8	Two 18-ga. Wires	Two 8-ga. Wires	Red and Yellow	Solid, Stranded	Polypropylene Plastic/Rubber Blend	Tin-Plated Steel	600V AC	220°	UL Listed, CSA Certified, CE Marked	25	0000000	0000
14-6	Four 14-ga. Wires	Two 6-ga. Wires	Blue and Gray	Solid, Stranded	Polypropylene Plastic/Rubber Blend	Tin-Plated Steel	600V AC	220°	UL Listed, CSA Certified, CE Marked	10	0000000	0000

Underground Easy-Grip Twist-On Wire Splicing Connectors

Suitable for use underground, these connectors consist of a twist-on wire connector and an abrasion- and moisture-resistant insulator tube. The tube is filled with grease that acts as a sealant. Use these connectors to make quick, secure wire connections without crimping.

For Wire Gauge	Min. Wire Combination	Max. Wire Combination	For Wire Type	Color	Insulation Material	Terminal Material	Max. Voltage	Max. Temperature, °F	Specifications Met	Pkg. Qty.		Pkg.
18-10	Two 18-ga. Wires	Three 10-ga. Wires	Solid, Stranded	Red, Yellow	Polypropylene Plastic/Rubber Blend	Tin-Plated Steel	600V AC	120°	UL Listed	2	0000000	000000

Padded Easy-Grip Twist-On Wire Splicing Connectors

Soft molding over the wings provides a comfortable grip. Use these connectors to make quick, secure wire connections without crimping.

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

For Wire Gauge	Min. Wire Combination	Max. Wire Combination	For Wire Type	Color	Insulation Material	Terminal Material	Max. Voltage	Max. Temperature, °F	Specifications Met	Pkg. Qty.		Pkg.
22-8	Two 18-ga. Wires	Four 10-ga. Wires	Solid, Stranded	Beige and Red	Polypropylene Plastic	Zinc-Plated Steel	600V AC 600V DC	220°	UL Listed, CSA Certified	50	000000	000000
22-8	Two 18-ga. Wires	Four 10-ga. Wires	Solid, Stranded	Beige and Red	Polypropylene Plastic	Zinc-Plated Steel	600V AC 600V DC	220°	UL Listed, CSA Certified	250	000000	00000
22-8	Two 18-ga. Wires	Four 10-ga. Wires	Solid, Stranded	Red and Yellow	Polypropylene Plastic	Zinc-Plated Steel	1,000V AC	220°	UL Listed, CSA Certified	50	000000	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.
26-20	0.75"	Red	Stranded	Nylon Plastic	Tin-Plated Brass	600V AC 600V DC	245°	UL Listed	8	0000000	000000
24-18	1.1"	Red	Stranded	Nylon Plastic	Tin-Plated Brass	600V AC 600V DC	245°	UL Listed	9	000000	00000
16-14	1.1"	Blue	Stranded	Nylon Plastic	Tin-Plated Brass	600V AC 600V DC	245°	UL Listed	9	0000000	00000
12-10	1.5"	Yellow	Stranded	Nylon Plastic	Tin-Plated Brass	600V AC 600V DC	245°	UL Listed	7	0000000	00000
8-6	1.7"	Green	Stranded	Nylon Plastic	Tin-Plated Brass	600V AC 600V DC	245°	UL Listed	6	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	1.2"	Red	Stranded	Nylon Plastic	Tin-Plated Brass	600V AC	245°	Sealed Threads	4	0000000	000000
16-14	1.2"	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	1.5"	Green	Stranded	Nylon Plastic	Tin-Plated Brass	600V AC	245°	Sealed Threads	4	0000000	00000

Twist-On Insulation-Piercing Wire Taps

T-Tap

Convenient for jobs where you don't have crimpers on hand, these wire taps twist together to connect a tap wire to a main wire. The cap locks the wire into place, making them good for high-vibration applications. As you twist the cap onto the main wire, it pierces the insulation, so you don’t need to strip the wire. However, you’ll need to strip the tap wire.

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

For Wire		For Tap Wire
Gauge	Type	Gauge	Type	Color	Insulation Material	Terminal Material	Max. Voltage	Max. Temperature, °F	Pkg. Qty.		Pkg.
Twist-On Tap with T-Tap Wire Connection
26-24	Stranded	24-18	Stranded	Red	Nylon Plastic	Tin-Plated Brass	600V AC 600V DC	245°	6	0000000	000000
22-20	Stranded	24-18	Stranded	Pink	Nylon Plastic	Tin-Plated Brass	600V AC 600V DC	245°	6	0000000	00000
18-12	Stranded	18-12	Stranded	Black	Nylon Plastic	Tin-Plated Brass	600V AC 600V DC	245°	6	0000000	00000
16-14	Stranded	24-18	Stranded	Blue	Nylon Plastic	Tin-Plated Brass	600V AC 600V DC	245°	6	0000000	00000
12-10	Stranded	18-12	Stranded	Yellow	Nylon Plastic	Tin-Plated Brass	600V AC 600V DC	245°	6	0000000	00000

Screw-Down Wire Taps

Wire Tap with Cover (Sold Separately)

Wire Tap

T-Tap

Cover

Tighten screws to connect a tap wire to a main wire. For easy installation, you can lay the main wire in these taps by sliding off the screw plate.

Covers (sold separately) are plastic, so they fully insulate wire taps when connected. They snap shut for quick installation.

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

Wire Taps
For Wire Gauge									Covers
Stranded	Solid	For Wire Material	Terminal Material	Max. Voltage	Max. Temperature, °F	Specifications Met		Each		Each
Screw-Clamp Terminals Tap with T-Tap Wire Connection
12-2	12-10	Aluminum, Copper	Tin-Plated Aluminum	600V AC	190°	UL Listed, CSA Certified	0000000	000000	0000000	00000
2-1/0	12-10	Aluminum, Copper	Tin-Plated Aluminum	600V AC	190°	UL Listed, CSA Certified	0000000	00000	0000000	0000
1/0-250 MCM	12-10	Aluminum, Copper	Tin-Plated Aluminum	600V AC	190°	UL Listed, CSA Certified	0000000	00000	0000000	00000

Wire Splice and Tap Assortments

No crimping or wire stripping needed—this assortment includes twist-on wire connectors and insulation-piercing wire taps.

Number of Pieces	Includes	For Wire Type	Max. Voltage	Max. Temp., °F		Each
100	75 twist-on wire connectors for wire sizes 22-8 AWG (orange, yellow, and red) 25 insulation-piercing wire taps for wire sizes 16-10 AWG for the main connection and 18-10 AWG for the tap connection Plastic Case	Solid, Stranded	300V DC 300V AC	220°	0000000	000000

Twist-On Wire Splicing Connector Assortments

Assortment

Straight Connector

Winged Connector

A good choice for jobs where you don’t have crimping tools on hand, these connectors twist on to install wire quickly. Some connectors are easy grip, so they have wings that increase your leverage when tightening.

Fully Insulated—Polyester Plastic, Polypropylene Plastic
Number of Pieces	Includes	Wire Splicing Connector Style	Terminal Material	Max. Temperature, °F	Max. Voltage	Specifications Met		Each
620	Easy-Grip Twist-On Splicing Connectors (22-6 AWG)—Fully Insulated Twist-On Splicing Connectors (22-8 AWG)—Fully Insulated Compartmented Plastic Case	Straight, Winged	Zinc-Plated Steel	220°	300V AC 300V DC 600V AC 600V DC	UL Listed, CSA Certified, UL 94 V-2	0000000	000000

Twist-On No-Crimp Butt Splice Assortments

Convenient for jobs when you don't have a crimping tool on hand, these butt splices have end caps that you twist instead of traditional crimping. The end caps lock the wire in place, making them good for high-vibration applications.

Fully Insulated—Nylon Plastic
Number of Pieces	Includes	Terminal Material	Maximum Voltage	Maximum Temperature, °F		Each
45	Butt Splices (24-10 AWG)—Fully Insulated	Tin-Plated Brass	600V AC 600V DC	245°	0000000	000000
100	Butt Splices (24-10 AWG)—Fully Insulated Plastic Compartmented Case	Tin-Plated Brass	600V AC 600V DC	245°	0000000	000000

Twist-On Insulation-Piercing Wire Tap Assortments

T-Tap

Twist the threaded end cap onto a main wire and a tap wire to connect them without crimping. Since you twist to connect, these wire taps are convenient for jobs where you don’t have many tools on hand. The cap locks the wire into place, making them good for high-vibration applications. As you twist the cap onto the main wire, it pierces the insulation, so you don’t need to strip the wire. However, you need to strip the tap wire.

Fully Insulated—Nylon Plastic
Number of Pieces	Includes	Wire Connection Style	For Wire Type	Terminal Material	Max. Temp., °F	Max. Voltage		Each
89	Insulation-Piercing Wire Taps (26-12 AWG)—Fully Insulated Plastic Case	T-Tap	Stranded	Tin-Plated Brass	245°	600V AC 600V DC	0000000	000000