Welding Plugs | McMaster-Carr

	NEMA Style NEMA Style


5-50	6-50	7-50

10-50	14-50	15-50

	Shape Shape


90° Elbow	Straight

	Type Type

Plug

Socket

	Current Current

	Connection Type Connection Type


Straight Blade	Welding

	Voltage Voltage

125V AC

250V AC

277V AC

	Grounding Grounding


Grounded	Non-Grounded

	Number of Blades Number of Blades

	Gender Gender

Male

Female

	Color Color

	Black
	Gray
	Yellow

	For Minimum Cable OD For Minimum Cable OD

	For Maximum Cable OD For Maximum Cable OD

	For Wire Gauge For Wire Gauge

4
3
2
1
1/0
2/0
3/0
4/0

	Specifications Met Specifications Met

CSA

Fed. Spec.

UL 94

	Housing Material Housing Material

Plastic

Rubber

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

DFARS Specialty Metals
COTS-Exempt

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

RoHS Compliant with
Exemptions

RoHS Compliant

	OD OD

	Width Width

2.8"

3.4"

	Length Length

4.9"

5.9"

	Mated Housing Diameter Mated Housing Diameter

1.3"

1.4"

	Mated Housing Length Mated Housing Length

28 Products

About NEMA Plugs, Sockets, and Receptacles

Premium Straight-Blade Plugs, Sockets, and Receptacles

Built to handle tough, repetitive-use applications, these are more durable than standard straight-blade connectors.

Note: The current rating of your plug should not exceed that of your socket or receptacle.

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

Three-Blade Plugs

NEMA 10-50 Male

Non-Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Environmental Rating	Specifications Met	Color		Each
10-50	125V AC/250V AC	50A	2.9"	Screw Terminals	0.63"-1.22"	IP20	UL Listed, CSA Certified, UL 94 HB	Black	0000000	0000000

Three-Blade 90° Elbow Plugs

NEMA 6-50 Male

NEMA 10-50 Male

Grounded
NEMA Style	Voltage	Current	OD	Wd.	Wire Connection Type	For Cable OD	Specifications Met	Color		Each
5-50	125V AC	50A	__	2.8"	Screw Terminals	0.63"-1.19"	UL Listed, CSA Certified, UL 498	Black	0000000	0000000
6-50	250V AC	50A	2.7"	__	Screw Terminals	0.63"-1.19"	UL Listed, CSA Certified, UL 498	Black	0000000	000000
7-50	277V AC	50A	__	2.8"	Screw Terminals	0.63"-1.19"	UL Listed, CSA Certified	Black	0000000	000000
Non-Grounded
10-50	125V AC/250V AC	50A	2.7"	__	Screw Terminals	0.63"-1.19"	UL Listed, CSA Certified, UL 498	Black	0000000	000000

Four-Blade Plugs

NEMA 14-50 Male

NEMA 15-50 Male

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Environmental Rating	Specifications Met	Color		Each
14-50	125V AC/250V AC	50A	2.9"	Screw Terminals	0.63"-1.31"	IP20	UL Listed, CSA Certified, UL 94 HB	Black	0000000	0000000
15-50	250V AC	50A	2.9"	Screw Terminals	0.63"-1.31"	IP20	UL Listed, CSA Certified, UL 94 HB	Black	0000000	000000

Four-Blade 90° Elbow Plugs

NEMA 14-50 Male

NEMA 15-50 Male

Grounded
NEMA Style	Voltage	Current	OD	Wd.	Wire Connection Type	For Cable OD	Specifications Met	Color		Each
14-50	125V AC/250V AC	50A	3.4"	__	Screw Terminals	0.63"-1.31"	UL Listed, CSA Certified, UL 498	Black	0000000	0000000
15-50	250V AC	50A	__	3.4"	Screw Terminals	0.63"-1.31"	UL Listed, CSA Certified	Black	0000000	000000

Straight-Blade Plugs, Sockets, and Receptacles

90° elbow plugs with a rotating face can be plugged in at any angle.

Note: The current rating of your plug should not exceed that of your socket or receptacle.

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

Three-Blade Plugs

NEMA 6-50 Male

NEMA 10-50 Male

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Color		Each
6-50	250V AC	50A	3.1"	Screw Terminals	0.43"-1.31"	Gray	0000000	000000
Non-Grounded
10-50	125V AC/250V AC	50A	2.6"	Screw Terminals	0.57"-1.26"	Yellow	0000000	00000

Three-Blade 90° Elbow Plugs

NEMA 6-50 Male

NEMA 10-50 Male

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Features	Color		Each
6-50	250V AC	50A	3.1"	Screw Terminals	0.56"-1.31"	Rotating Face	Gray	0000000	000000
Non-Grounded
10-50	125V AC/250V AC	50A	2.8"	Screw Terminals	0.56"-1.1"	__	Black	0000000	00000

Four-Blade Plugs

NEMA 14-50 Male

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Color		Each
14-50	125V AC/250V AC	50A	3.1"	Screw Terminals	0.43"-1.31"	Gray	0000000	000000

Four-Blade 90° Elbow Plugs

NEMA 14-50 Male

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Features	Color		Each
14-50	125V AC/250V AC	50A	3.3"	Screw Terminals	0.63"-1.38"	Rotating Face	Black	0000000	000000

Welding Cable Connectors

Deliver power to welding cable. Plugs lock into sockets with a cam action that pulls the two pieces together tightly. The housing resists oil.

Use lug adapters (sold separately) to connect welding plugs to the stud of a power supply.

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

Plugs

Current	Wire Connection Type	For Wire Gauge	For Cable OD	Housing Connection Type	OD	Lg.	Color	Temp. Range, °F		Each
250A	Screw Terminals	4-1/0	0.2"-0.5"	Push In	1.3"	5.9"	Black	-50° to 350°	0000000	000000
350A	Screw Terminals	1/0-2/0	0.32"-0.56"	Push In	1.4"	5.9"	Black	-50° to 350°	0000000	00000
500A	Screw Terminals	3/0-4/0	0.41"-0.63"	Push In	1.4"	5.9"	Black	-50° to 350°	0000000	00000

Sockets

Current	Wire Connection Type	For Wire Gauge	For Cable OD	Housing Connection Type	OD	Lg.	Color	Temp. Range, °F		Each
250A	Screw Terminals	4-1/0	0.2"-0.5"	Push In	1.3"	4.9"	Black	-50° to 350°	0000000	000000
350A	Screw Terminals	1/0-2/0	0.32"-0.56"	Push In	1.4"	4.9"	Black	-50° to 350°	0000000	00000
500A	Screw Terminals	3/0-4/0	0.41"-0.63"	Push In	1.4"	4.9"	Black	-50° to 350°	0000000	00000

Lug Adapters

Straight
Max. Current	Sleeve Material	Color	OD	For Stud Size	Max. Temp., °F		Each
250A	Bronze	Black	1.1"	1/2"	475°	000000	000000
500A	Bronze	Black	1.2"	1/2"	475°	000000	00000
45° Elbow
250A	Bronze	Black	1.1"	1/2"	475°	000000	00000
500A	Bronze	Black	1.2"	1/2"	475°	000000	00000

Welding Cable Connector Sets

Each set includes one plug and one socket. Plugs lock into sockets with a cam action that pulls the two pieces together tightly. The housing resists oil.

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

					Mated Housing
Current	Wire Connection Type	For Wire Gauge	For Cable OD	Housing Connection Type	Dia.	Lg.	Color	Temp. Range, °F		Each
250A	Screw Terminals	4-1/0	0.2"-0.5"	Push In	1.3"	9.7"	Black	-50° to 350°	0000000	000000
350A	Screw Terminals	1/0-2/0	0.32"-0.56"	Push In	1.4"	9.8"	Black	-50° to 350°	0000000	00000
500A	Screw Terminals	3/0-4/0	0.41"-0.63"	Push In	1.4"	9.8"	Black	-50° to 350°	0000000	00000