Electrical Box Nipples | McMaster-Carr

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27 Products

About Conduit

Connectors for Medium-Wall (IMC) and Thick-Wall (Rigid) Steel Conduit

Join pieces of medium-wall (IMC) and thick-wall (rigid) conduit.

Fully threaded male and male with threaded ends are also known as nipple extensions. They extend the length of conduit or connect two outlet boxes or enclosures.

Offset elbow connectors join knockouts on outlet boxes or enclosures that do not align.

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

Straight Connectors—Threaded Conduit or Electrical Box Connection

Fully Threaded

With Threaded Ends

Conduit or Electrical Box Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	Lg.	Material	Specifications Met		Each
Fully Threaded
1/2	1/2	NPT	Male	1 1/8"	Galvanized Steel	UL Listed, C-UL Listed, CSA Certified	0000000	00000
3/4	3/4	NPT	Male	1 3/8"	Galvanized Steel	UL Listed, C-UL Listed, CSA Certified	0000000	0000
1	1	NPT	Male	1 1/2"	Galvanized Steel	UL Listed, C-UL Listed, CSA Certified	0000000	0000
Threaded Ends
1/2	1/2	NPT	Male	3"	Galvanized Steel	UL Listed, C-UL Listed, CSA Certified	0000000	0000
1/2	1/2	NPT	Male	6"	Galvanized Steel	UL Listed, C-UL Listed, CSA Certified	0000000	0000
3/4	3/4	NPT	Male	3"	Galvanized Steel	UL Listed, C-UL Listed, CSA Certified	0000000	0000
3/4	3/4	NPT	Male	6"	Galvanized Steel	UL Listed, C-UL Listed, CSA Certified	0000000	0000
1	1	NPT	Male	3"	Galvanized Steel	UL Listed, C-UL Listed, CSA Certified	0000000	0000
1	1	NPT	Male	6"	Galvanized Steel	UL Listed, C-UL Listed, CSA Certified	0000000	0000

Offset Elbow Connectors—Threaded Conduit or Electrical Box Connection

Conduit or Electrical Box Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	Offset Lg.	Material	Specifications Met		Each
1/2	1/2	NPSM	Male	3/4"	Zinc	UL Listed, CSA Certified	0000000	00000
3/4	3/4	NPSM	Male	3/4"	Zinc	UL Listed, CSA Certified	0000000	0000
1	1	NPSM	Male	3/4"	Zinc	UL Listed, CSA Certified	0000000	0000
1 1/4	1 1/4	NPSM	Male	3/4"	Zinc	UL Listed, CSA Certified	0000000	0000
1 1/2	1 1/2	NPSM	Male	3/4"	Zinc	UL Listed, CSA Certified	0000000	0000
2	2	NPSM	Male	3/4"	Zinc	UL Listed, CSA Certified	0000000	00000

Adapters for Medium-Wall (IMC) and Thick-Wall (Rigid) Steel Conduit

Attach medium-wall (IMC) and thick-wall (rigid) steel conduit to a knockout in an outlet box or enclosure.

NPSM male × flanged end male straight adapters are also known as conduit nipples, chase nipples, and box adapters. The flange installs through a knockout from inside an outlet box or enclosure. Use with a locknut (not included) to create a short raceway between boxes or enclosures.

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

Straight Adapters—Threaded Conduit Connection × Flanged End Electrical Box Connection

Conduit Connection				Electrical Box Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	For Knockout Trade Size	Gender	Lg.	Material	Specifications Met		Each
1/2	1/2	NPSM	Male	1/2	Male	5/8"	Zinc	UL Listed, C-UL Listed, CSA Certified	0000000	00000
3/4	3/4	NPSM	Male	3/4	Male	3/4"	Zinc	UL Listed, C-UL Listed, CSA Certified	0000000	0000
1	1	NPSM	Male	1	Male	13/16"	Zinc	UL Listed, C-UL Listed, CSA Certified	0000000	0000
1 1/4	1 1/4	NPSM	Male	1 1/4	Male	7/8"	Zinc	UL Listed, C-UL Listed, CSA Certified	0000000	0000
1 1/2	1 1/2	NPSM	Male	1 1/2	Male	15/16"	Zinc	UL Listed, C-UL Listed, CSA Certified	0000000	0000
2	2	NPSM	Male	2	Male	1"	Zinc	UL Listed, C-UL Listed, CSA Certified	0000000	0000

Adapters for Choose-a-Color Flexible Plastic Conduit

Snap-In × Snap-In

Snap-In × Threaded

Tabs on one end snap into grooves in conduit; the other end attaches to a knockout in an outlet box or enclosure.

Adapters with a threaded end require a locknut (not included) to install in unthreaded holes.

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

Conduit Connection		Electrical Box Connection
Conduit Trade Size	Gender	Pipe Size	Thread Type	For Knockout Trade Size	Gender	Material	Color	Temperature Range, °F	Specifications Met		Each
Snap-In Conduit Connection × Snap-In Electrical Box Connection
1/2	Female	__	__	1/2	Male	PVC	Blue	0° to 140°	UL Listed, CSA Certified	0000000	00000
3/4	Female	__	__	3/4	Male	PVC	Blue	0° to 140°	UL Listed, CSA Certified	0000000	0000
1	Female	__	__	1	Male	PVC	Blue	0° to 140°	UL Listed, CSA Certified	0000000	0000
Snap-In Conduit Connection × Threaded Electrical Box Connection
1/2	Female	1/2	NPT	__	Male	PVC	Blue	0° to 140°	UL Listed, CSA Certified	0000000	0000
3/4	Female	3/4	NPT	__	Male	PVC	Blue	0° to 140°	UL Listed, CSA Certified	0000000	0000
1	Female	1	NPT	__	Male	PVC	Blue	0° to 140°	UL Listed, CSA Certified	0000000	00000