Conduit Hubs | McMaster-Carr

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18 Products

About Conduit

Attach rigid aluminum conduit to a knockout in an outlet box or enclosure with these adapters, also known as hubs. Made of nonmagnetic aluminum, they withstand damp and corrosive environments.

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

Conduit Connection				Electrical Box Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender		Each
1/2	1/2	NPT	Female	1/2	NPSM	Male	0000000	000000
3/4	3/4	NPT	Female	3/4	NPSM	Male	0000000	00000
1	1	NPT	Female	1	NPSM	Male	0000000	00000
1 1/4	1 1/4	NPT	Female	1 1/4	NPSM	Male	0000000	00000
1 1/2	1 1/2	NPT	Female	1 1/2	NPSM	Male	0000000	00000
2	2	NPT	Female	2	NPSM	Male	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. NPT female × NPSM male straight adapters are also known as hubs. They have an insulated throat to protect wire and cable from abrasion when being pulled. Use in wet or dry locations.

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

Straight Adapters—Threaded Conduit Connection × Threaded Electrical Box Connection

Conduit Connection				Electrical Box Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Material	Includes	Specifications Met		Each
1/2	1/2	NPT	Female	1/2	NPSM	Male	Zinc	Locknut	UL Listed, C-UL Listed, CSA Certified	0000000	00000
3/4	3/4	NPT	Female	3/4	NPSM	Male	Zinc	Locknut	UL Listed, C-UL Listed, CSA Certified	0000000	00000
1	1	NPT	Female	1	NPSM	Male	Zinc	Locknut	UL Listed, C-UL Listed, CSA Certified	0000000	00000
1 1/4	1 1/4	NPT	Female	1 1/4	NPSM	Male	Zinc	Locknut	UL Listed, C-UL Listed, CSA Certified	0000000	00000
1 1/2	1 1/2	NPT	Female	1 1/2	NPSM	Male	Zinc	Locknut	UL Listed, C-UL Listed, CSA Certified	0000000	00000
2	2	NPT	Female	2	NPSM	Male	Zinc	Locknut	UL Listed, C-UL Listed, CSA Certified	0000000	00000

Adapters for Rigid Stainless Steel Conduit

Threaded Conduit Connection

Also known as hubs, these adapters attach rigid stainless steel conduit to a knockout in an outlet box or enclosure. They are corrosion resistant, so you can use them in food-processing and chemical plants.

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

Conduit Connection				Electrical Box Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Material	Gasket Material	Specifications Met		Each
Threaded Conduit Connection
1/2	1/2	NPT	Female	1/2	NPSM	Male	316 Stainless Steel	Fluoroelastomer Rubber	UL Listed, C-UL Listed	0000000	0000000
3/4	3/4	NPT	Female	3/4	NPSM	Male	316 Stainless Steel	Fluoroelastomer Rubber	UL Listed, C-UL Listed	0000000	000000
1	1	NPT	Female	1	NPSM	Male	316 Stainless Steel	Fluoroelastomer Rubber	UL Listed, C-UL Listed	0000000	000000
1 1/4	1 1/4	NPT	Female	1 1/4	NPSM	Male	316 Stainless Steel	Fluoroelastomer Rubber	UL Listed, C-UL Listed	0000000	000000
1 1/2	1 1/2	NPT	Female	1 1/2	NPSM	Male	316 Stainless Steel	Fluoroelastomer Rubber	UL Listed, C-UL Listed	0000000	000000
2	2	NPT	Female	2	NPSM	Male	316 Stainless Steel	Fluoroelastomer Rubber	UL Listed, C-UL Listed	0000000	000000

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About Conduit

Adapters for Rigid Aluminum Conduit

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

Adapters for Rigid Stainless Steel Conduit