Electrical Box Clamps | McMaster-Carr

	For Knockout Trade Size For Knockout Trade Size

	Cord Holding Type Cord Holding Type


Screw-Down Clamp	Bushing

Locking Tab

	For Cable Shape For Cable Shape

Flat

Round

	Knockout Connection Type Knockout Connection Type


Threaded	Snap In

	Material Material

Zinc

Plastic

	Pipe Size Pipe Size

	For Conduit Trade Size For Conduit Trade Size

	Maximum Hole Diameter Maximum Hole Diameter

	Specifications Met Specifications Met

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

RoHS Compliant

RoHS Compliant with
Exemptions

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

DFARS Specialty Metals
COTS-Exempt

	Thread Size Thread Size

	Thread Type Thread Type

Metric

	For Minimum Cord OD For Minimum Cord OD

	For Cord OD Range For Cord OD Range

	Color Color

	Black
	Gray

	Environment Environment

Corrosive

Damp

Dusty

High-
Pressure
Washdown

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

REACH Compliant

	Environmental Rating Environmental Rating

	For Maximum Cord OD For Maximum Cord OD

	For Maximum Cable Diameter For Maximum Cable Diameter

27 Products

Screw-Down Cord Grips for Building Cable

Tighten the screws to secure building cable for dry locations, also known as Romex type NM-B cable, to enclosures and outlet boxes.

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

	For Trade Size						Each
Max. Hole Dia.	Conduit	Knockout	Material	Features	Specifications Met		1-19	20-Up
0.66"	3/8	1/2	Zinc	Zinc Locknut	UL Listed	0000000	00000	00000
0.86"	3/4	3/4	Zinc	Zinc Locknut	UL Listed	0000000	0000	0000
1.08"	1	1	Zinc	Zinc Locknut	UL Listed	0000000	0000	0000
1.41"	1 1/4	1 1/4	Zinc	Zinc Locknut	UL Listed	0000000	0000	0000
1.65"	1 1/2	1 1/2	Zinc	Zinc Locknut	UL Listed	0000000	0000	0000
2.09"	2	2	Zinc	Zinc Locknut	UL Listed	0000000	0000	0000

Locking Snap-In Cord Grips for Building Cable

An insert clamps the cable in place and provides more strain relief than standard snap-in cord grips for building cable. Use to connect building cable for dry locations, also known as Romex type NM-B cable, to enclosures and outlet boxes by pushing these grips into a knockout.

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

For Trade Size		For Max. Cable							Each
Conduit	Knockout	Dia.	Wd.	Thick.	Material	Cord Holding Type	Specifications Met		1-19	20-Up
1/2	1/2	__	0.53"	0.3"	Gray PVC Plastic	Locking Tab	UL Listed, C-UL Listed, CSA Certified	0000000	00000	00000
1/2	1/2	0.66"	__	__	Gray PVC Plastic	Locking Tab	UL Listed, C-UL Listed, CSA Certified	0000000	000	000
3/4	3/4	0.83"	__	__	Gray PVC Plastic	Locking Tab	UL Listed, C-UL Listed, CSA Certified	0000000	0000	0000
1	1	1.13"	__	__	Gray PVC Plastic	Locking Tab	UL Listed, C-UL Listed, CSA Certified	0000000	0000	0000
1 1/4	1 1/4	1.44"	__	__	Gray PVC Plastic	Locking Tab	UL Listed, C-UL Listed, CSA Certified	0000000	0000	0000

Screw-Down Sure-Grip Plastic Submersible Cord Grips

Tighten the screw-down clamp on these grips for superior pull-out resistance while relieving tension at connection points. Grips are rated IP68 for protection from prolonged submersion and IP69K for protection against high-pressure, high-temperature jets of water. A rubber bushing and O-ring create a tight seal to prevent liquid from entering the connection.

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

PG Threads
For Cord OD	For Knockout Trade Size	Material	Temp. Range, °F	Features	Environmental Rating	Specifications Met		Each
0.16"-0.31"	PG-9	Black Nylon Plastic	0° to 155°	Rubber O-Ring, Nylon Plastic Locknut	IP68, IP69K, NEMA 4X, NEMA 6	UL 94 V-0, CE Marked, DNV-GL Type Approved	00000000	000000
0.24"-0.39"	PG-11	Black Nylon Plastic	0° to 155°	Rubber O-Ring, Nylon Plastic Locknut	IP68, IP69K, NEMA 4X, NEMA 6	UL 94 V-0, CE Marked, DNV-GL Type Approved	00000000	00000
0.24"-0.47"	PG-13.5	Black Nylon Plastic	0° to 155°	Rubber O-Ring, Nylon Plastic Locknut	IP68, IP69K, NEMA 4X, NEMA 6	UL 94 V-0, CE Marked, DNV-GL Type Approved	00000000	00000
0.39"-0.55"	PG-16	Black Nylon Plastic	0° to 155°	Rubber O-Ring, Nylon Plastic Locknut	IP68, IP69K, NEMA 4X, NEMA 6	UL 94 V-0, CE Marked, DNV-GL Type Approved	00000000	00000
0.51"-0.71"	PG-21	Black Nylon Plastic	0° to 155°	Rubber O-Ring, Nylon Plastic Locknut	IP68, IP69K, NEMA 4X, NEMA 6	UL 94 V-0, CE Marked, DNV-GL Type Approved	00000000	00000
0.71"-0.98"	PG-29	Black Nylon Plastic	0° to 155°	Rubber O-Ring, Nylon Plastic Locknut	IP68, IP69K, NEMA 4X, NEMA 6	UL 94 V-0, CE Marked, DNV-GL Type Approved	00000000	00000
0.87"-1.26"	PG-36	Black Nylon Plastic	0° to 155°	Rubber O-Ring, Nylon Plastic Locknut	IP68, IP69K, NEMA 4X, NEMA 6	UL 94 V-0, CE Marked, DNV-GL Type Approved	00000000	00000
1.26"-1.5"	PG-42	Black Nylon Plastic	0° to 155°	Rubber O-Ring, Nylon Plastic Locknut	IP68, IP69K, NEMA 4X, NEMA 6	UL 94 V-0, CE Marked, DNV-GL Type Approved	00000000	00000
1.45"-1.73"	PG-48	Black Nylon Plastic	0° to 155°	Rubber O-Ring, Nylon Plastic Locknut	IP68, IP69K, NEMA 4X, NEMA 6	UL 94 V-0, CE Marked, DNV-GL Type Approved	00000000	000000
Metric Threads
0.16"-0.31"	M16	Black Nylon Plastic	0° to 155°	Rubber O-Ring, Nylon Plastic Locknut	IP68, IP69K, NEMA 4X, NEMA 6	UL 94 V-0, CE Marked, DNV-GL Type Approved	0000000	00000
0.24"-0.47"	M20	Black Nylon Plastic	0° to 155°	Rubber O-Ring, Nylon Plastic Locknut	IP68, IP69K, NEMA 4X, NEMA 6	UL 94 V-0, CE Marked, DNV-GL Type Approved	0000000	00000
0.51"-0.71"	M25	Black Nylon Plastic	0° to 155°	Rubber O-Ring, Nylon Plastic Locknut	IP68, IP69K, NEMA 4X, NEMA 6	UL 94 V-0, CE Marked, DNV-GL Type Approved	0000000	00000
0.71"-0.98"	M32	Black Nylon Plastic	0° to 155°	Rubber O-Ring, Nylon Plastic Locknut	IP68, IP69K, NEMA 4X, NEMA 6	UL 94 V-0, CE Marked, DNV-GL Type Approved	0000000	00000
0.87"-1.26"	M40	Black Nylon Plastic	0° to 155°	Rubber O-Ring, Nylon Plastic Locknut	IP68, IP69K, NEMA 4X, NEMA 6	UL 94 V-0, CE Marked, DNV-GL Type Approved	0000000	00000
1.26"-1.5"	M50	Black Nylon Plastic	0° to 155°	Rubber O-Ring, Nylon Plastic Locknut	IP68, IP69K, NEMA 4X, NEMA 6	UL 94 V-0, CE Marked, DNV-GL Type Approved	00000000	00000
1.45"-1.73"	M63	Black Nylon Plastic	0° to 155°	Rubber O-Ring, Nylon Plastic Locknut	IP68, IP69K, NEMA 4X, NEMA 6	UL 94 V-0, CE Marked, DNV-GL Type Approved	00000000	000000