6-20 Extension Cords | McMaster-Carr

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30 Products

About Industry Designation for Cable Insulation

About NEMA Straight-Blade Plugs, Connectors, and Receptacles

About NEMA Plugs, Sockets, and Receptacles

About Extension Cords

Abrasion-Resistant Extension Cords for Harsh Environments

Run these cords through high-traffic areas in dirty and greasy environments. They have a thick insulation that resists water, oil, and chemicals, and protects against abrasion.

SOOW cords have both an outer and inner insulation that resists oil, making them more durable than SEOW cords, which only have an outer insulation. SOOW cords also have impact-resistant connectors.

NEMA 6-20 Plug

NEMA 6-20 Socket

				Cord
Wire Gauge	Current, A	Voltage	Power-Indicating Light	OD	Insulation Material	Industry Designation	Specifications Met	Color		Each
NEMA 6-20 Plug × NEMA 6-20 Socket
25 ft.
14	18	250V AC	Without Power-Indicating Light	0.5"	Rubber	SOOW	UL Listed	Yellow	0000000	0000000

Light Duty Extension Cords

90° Elbow Plug × Socket

NEMA 6-20 Plug

NEMA 6-20 Socket

Designed for indoor applications, these cords are often used to power appliances. The industry designation is SPT, so they have a flat cord shape.

Cords with a 90° elbow plug fit flush against a wall outlet for use behind machinery or in areas where space is tight.

					Cord
Lg., ft.	Wire Gauge	Current, A	Voltage	Power-Indicating Light	Wd.	Insulation Material	Industry Designation	Specifications Met	Color		Each
90° Elbow NEMA 6-20 Plug × NEMA 6-20 Socket
9	12	20	250V AC	Without Power-Indicating Light	1.25"	PVC Plastic	SPT-3	UL Listed, C-UL Listed	Gray	0000000	000000

GFCI Extension Cords

Keep personnel safe from electric shock with these cords. The industry desgination is SJTW, so the insulation resists water.

Cords with manual GFCI reset prevent unexpected start-up.

Plug × Socket with Inline GFCI

NEMA 6-20 Plug

NEMA 6-20 Socket

NEMA 6-20 Plug × NEMA 6-20 Socket
Lg., ft.	No. of Outlets	Wire Gauge	Current, A	Voltage	GFCI Location	Reset Type	Power-Indicating Light	Cord Insulation Material	Industry Designation	Specifications Met	Color		Each
6	1	12	20	250V AC	Inline	Manual	Without Power-Indicating Light	PVC Plastic	SJTW	UL Listed, CSA Certified	Yellow	0000000	0000000

Extension Cord Adapters

Plug × Socket

NEMA L14-30 Plug

NEMA 6-20 Socket

Change the connection style between an outlet and your equipment.

STW and SJTW adapters have a water-resistant outer insulation.

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

					Cord
Lg.	Wire Gauge	Current, A	Voltage	Power-Indicating Light	OD	Insulation Material	Industry Designation	Color		Each
NEMA L14-30 Plug × NEMA 6-20 Socket
1 1/2 ft.	10	30	125V AC/250V AC	Without Power-Indicating Light	0.69"	PVC Plastic	STW	Yellow	0000000	000000

Electronic Equipment Power Cords

NEMA Plug × IEC Socket

IEC C19 Socket

NEMA 6-20 Plug

Use these cords with computers, lab equipment, and office machines that have IEC connections.

Use SJT cords in dry or damp environments.

				Cord
Wire Gauge	Current, A	Voltage	Lg., ft.	OD	Insulation Material	Industry Designation	Temp. Range, °F	Specifications Met	Color		Each
NEMA 6-20 Plug × IEC C19 Socket
12	20	250V AC	8	0.45"	PVC Plastic	SJT	-40° to 140°	UL Listed, C-UL Listed, IEC 60320	Black	00000000	000000

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 6-20 Male

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Environmental Rating	Specifications Met	Color		Each
6-20	250V AC	20A	1.5"	Screw Terminals	0.23"-0.72"	IP20	UL Listed, CSA Certified, UL 94 HB, UL 498	Black	0000000	000000

Three-Blade 90° Elbow Plugs

NEMA 6-20 Male

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Environmental Rating	Specifications Met	Color		Each
6-20	250V AC	20A	1.5"	Screw Terminals	0.33"-0.66"	IP20	UL Listed, CSA Certified, UL 94 HB, UL 498	Black	0000000	000000

Three-Slot Sockets

NEMA 6-20 Female

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Environmental Rating	Specifications Met	Color		Each
6-20	250V AC	20A	1.5"	Screw Terminals	0.23"-0.72"	IP20	UL Listed, CSA Certified, UL 94 HB, UL 498	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 6-20 Male

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Color		Each
6-20	250V AC	20A	1.5"	Screw Terminals	0.34"-0.64"	Black	0000000	000000

Three-Blade 90° Elbow Plugs

NEMA 6-20 Male

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Features	Color		Each
6-20	250V AC	20A	2.1"	Screw Terminals	0.3"-0.66"	Rotating Face	Black	0000000	000000

Three-Slot Sockets

NEMA 6-20 Female

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Color		Each
6-20	250V AC	20A	1.5"	Screw Terminals	0.34"-0.64"	Black	0000000	000000

Hinged Straight-Blade Plugs and Sockets

Access the wire connection by opening the hinged housing. The housing is impact-resistant plastic.

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

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

Three-Blade Plugs

Hinged Housing Shown Open

NEMA 6-20 Male

Grounded
NEMA Style	Voltage	Current	Wire Connection Type	For Cable OD	Color		Each
6-20	250V AC	20A	Screw Terminals	0.23"-0.72"	Yellow	0000000	000000

Three-Slot Sockets

Hinged Housing Shown Open

NEMA 6-20 Female

Grounded
NEMA Style	Voltage	Current	Wire Connection Type	For Cable OD	Color		Each
6-20	250V AC	20A	Screw Terminals	0.23"-0.72"	Yellow	0000000	000000

Ground-Monitoring Straight-Blade Plugs and Sockets

Check the status of your ground connection—a green light signals that connectors have power and are safely grounded. A red light indicates power only. The lights are visible from any angle for quick identification.

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

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

Three-Blade Plugs

NEMA 6-20 Male

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Environmental Rating	Specifications Met	Color		Each
6-20	250V AC	20A	1.4"	Screw Terminals	0.23"-0.72"	IP20	UL Listed, C-UL Listed, Fed. Spec. W-C-596	Black	0000000	000000

Three-Slot Sockets

NEMA 6-20 Female

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Environmental Rating	Color		Each
6-20	250V AC	20A	1.4"	Screw Terminals	0.23"-0.72"	IP20	Black	0000000	000000

Sure-Grip Straight-Blade Plugs, Sockets, and Receptacles

Also known as hospital-grade connectors, these have an extra-tight fit when mated to remain secure in high-vibration environments. The housing is impact-resistant plastic.

Plugs and sockets are clear so you can view wire connections. 90° elbow plugs have a rotating face to plug 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 6-20 Male

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Features	Color		Each
6-20	250V AC	20A	1.5"	Screw Terminals	0.23"-0.72"	Green Dot, Clear Face	Black	0000000	000000

Three-Blade 90° Elbow Plugs

NEMA 6-20 Male

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Features	Specifications Met	Color		Each
6-20	250V AC	20A	1.5"	Screw Terminals	0.3"-0.63"	Green Dot, Rotating Face	UL Listed, CSA Certified, Fed. Spec. W-C-596, UL 498	Clear	0000000	000000

Three-Slot Sockets

NEMA 6-20 Female

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Features	Specifications Met	Color		Each
6-20	250V AC	20A	1.5"	Screw Terminals	0.23"-0.72"	Green Dot, Clear Face	UL Listed, C-UL Listed, CSA Certified, Fed. Spec. W-C-596, UL 498	Black	0000000	000000

Impact-Resistant Straight-Blade Plugs and Sockets

A rubber housing protects these connectors from damage caused by drops and impact. They are not intended for use in wet or damp environments.

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

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

Three-Blade Plugs

NEMA 6-20 Male

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Color		Each
6-20	250V AC	20A	1.5"	Screw Terminals	0.34"-0.64"	Yellow	00000000	000000

Three-Slot Sockets

NEMA 6-20 Female

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Color		Each
6-20	250V AC	20A	1.5"	Screw Terminals	0.34"-0.64"	Yellow	00000000	000000

Washdown Straight-Blade Connectors and Cords

All connectors have a multiple-ring seal and rubber housing to keep out liquid. They resist heat, oil, and chemicals. When mated, connectors meet NEMA 6P, NEMA 12, and either IP67 or IP69K.

Connectors that meet IP69K resist high-pressure washdowns.

Plugs mate with female receptacles and female sockets with an attached cover.

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 6-20 Male

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Color		Each
6-20	250V AC	20A	1.9"	Screw Terminals	0.25"-0.44", 0.5"-0.63"	Black	0000000	000000
6-20	250V AC	20A	2.5"	Screw Terminals	0.25"-0.44", 0.5"-0.63"	Yellow	0000000	00000

Yellow Cap for Plugs	000000000	Each	000000
Black Cap for Plugs	000000000	Each	00000

Three-Slot Sockets

NEMA 6-20 Female

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Color		Each
6-20	250V AC	20A	1.9"	Screw Terminals	0.25"-0.44", 0.5"-0.63"	Yellow	0000000	000000

Three-Slot Sockets with Attached Cover

NEMA 6-20 Female

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Color		Each
6-20	250V AC	20A	1.9"	Screw Terminals	0.25"-0.44", 0.5"-0.63"	Yellow	0000000	000000

Replacement Yellow Cap for Sockets

000000000

Each

000000

Harsh Environment Straight-Blade Plugs, Sockets, and Receptacles

Rated NEMA 6P, 13, IP66, and IP69K when mated, connectors withstand oil/coolant spraying; temporary submersion; high-pressure, high-temperature washdowns; and are corrosion resistant so they can be used in marine environments.

Plugs have a multiple-ring seal to keep out liquid when mated. They have a locking ring that screws together with sockets and receptacles so connections remain secure in high-vibration applications such as oil drilling and mining operations.

Sockets and receptacles have an attached cover that creates a watertight seal when not in use.

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 6-20 Male

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Features	Environmental Rating	Color		Each
6-20	250V AC	20A	2.4"	Screw Terminals	0.38"-0.67"	Multiple-Ring Seal, Aluminum Locking Ring	NEMA 6P, NEMA 13, IP66, IP67, IP68, IP69K	Black	0000000	000000

Three-Slot Sockets

NEMA 6-20 Female

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Environmental Rating	Color		Each
6-20	250V AC	20A	2.4"	Screw Terminals	0.38"-0.67"	NEMA 6P, NEMA 13, IP66, IP67, IP68, IP69K	Black	0000000	0000000

Corrosion-Resistant Straight-Blade Plugs, Sockets, and Receptacles

Stainless steel hardware and nickel-plated blades or slots protect connections from damage in corrosive environments. The housing is impact-resistant plastic.

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 6-20 Male

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Environmental Rating	Color		Each
6-20	250V AC	20A	1.5"	Screw Terminals	0.23"-0.72"	IP20	Yellow	00000000	000000