Iron Duct | McMaster-Carr

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Conduit Trade Size

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For Rigid Conduit Trade Size

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For EMT Conduit Trade Size

For Conduit Material

115 Products

Selecting Clamps Using Pipe, Conduit, or Tubing Trade Size

About Conduit

Adapters for Flexible Metal Conduit

Attach flexible metal conduit to a knockout in an outlet box or enclosure. The screw-clamp end tightens around conduit with a screw. Iron adapters are stronger and more durable than zinc adapters.

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

Straight Adapters—Iron

Conduit Connection		Electrical Box Connection
Conduit Trade Size	Gender	Pipe Size	Thread Type	Gender	Specifications Met		Each
Screw-Clamp Conduit Connection × Threaded Electrical Box Connection
3/8	Female	1/2	NPSM	Male	UL Listed	0000000	00000
1/2	Female	1/2	NPSM	Male	UL Listed	0000000	0000
3/4	Female	3/4	NPSM	Male	UL Listed	0000000	0000
1	Female	1	NPT	Male	UL Listed	0000000	0000
1 1/4	Female	1 1/4	NPT	Male	UL Listed	0000000	0000
1 1/2	Female	1 1/2	NPT	Male	UL Listed	0000000	00000
2	Female	2	NPT	Male	UL Listed	0000000	00000

90° Elbow Adapters—Iron

Conduit Connection		Electrical Box Connection
Conduit Trade Size	Gender	Pipe Size	Thread Type	Gender	Specifications Met		Each
Screw-Clamp Conduit Connection × Threaded Electrical Box Connection
3/8	Female	1/2	NPSM	Male	UL Listed	0000000	00000
1/2	Female	1/2	NPSM	Male	UL Listed	0000000	0000
3/4	Female	3/4	NPSM	Male	UL Listed	0000000	0000
1	Female	1	NPSM	Male	UL Listed	0000000	00000
1 1/4	Female	1 1/4	NPSM	Male	UL Listed	0000000	00000
1 1/2	Female	1 1/2	NPSM	Male	UL Listed	0000000	00000
2	Female	2	NPSM	Male	UL Listed	0000000	00000

Fittings for Liquid-Tight Flexible Metal Conduit

When used to connect liquid-tight flexible metal conduit to a knockout in an outlet box or enclosure, these fittings seal out liquids. Attach the twist-in end to conduit with a few quick turns.

Adapters with grounding lug ground conduit outside an outlet box or enclosure. Run a ground wire through the lug.These fittings seal out liquids when connecting liquid-tight flexible metal conduit to a knockout in an outlet box or enclosure.

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

Straight Adapters

Adapter with
Grounding
Lug and Locknut

Conduit Connection			Electrical Box Connection
Conduit Trade Size	Conduit Connection Type	Gender	Pipe Size	Thread Type	Gender	Specifications Met		Each
Adapters with Grounding Lug and Locknut—Iron
1 1/4	Twist-In	Female	1 1/4	NPT	Male	UL Listed, CSA Certified	0000000	000000
1 1/2	Twist-In	Female	1 1/2	NPT	Male	UL Listed, CSA Certified	0000000	00000
2	Twist-In	Female	2	NPT	Male	UL Listed, CSA Certified	0000000	000000

45° Elbow Adapters

Adapter with Locknut

Adapter with Grounding Lug and Locknut

Conduit Connection			Electrical Box Connection
Conduit Trade Size	Conduit Connection Type	Gender	Pipe Size	Thread Type	Gender	Specifications Met		Each
Adapters with Locknut—Zinc-Plated Iron
3/8	Twist-In	Female	1/2	NPT	Male	UL Listed, CSA Certified	0000000	000000
1/2	Twist-In	Female	1/2	NPT	Male	UL Listed, CSA Certified	0000000	00000
3/4	Twist-In	Female	3/4	NPT	Male	UL Listed, CSA Certified	0000000	00000
1	Twist-In	Female	1	NPT	Male	UL Listed, CSA Certified	0000000	00000
1 1/4	Twist-In	Female	1 1/4	NPT	Male	UL Listed, CSA Certified	0000000	00000
1 1/2	Twist-In	Female	1 1/2	NPT	Male	UL Listed, CSA Certified	0000000	00000
2	Twist-In	Female	2	NPT	Male	UL Listed, CSA Certified	0000000	00000
Adapters with Locknut—Iron
3/8	Twist-In	Female	1/2	NPT	Male	UL Listed, C-UL Listed	0000000	0000
1/2	Twist-In	Female	1/2	NPT	Male	UL Listed, C-UL Listed	0000000	0000
3/4	Twist-In	Female	3/4	NPT	Male	UL Listed, C-UL Listed	0000000	00000
1	Twist-In	Female	1	NPT	Male	UL Listed, C-UL Listed	0000000	00000
1 1/4	Twist-In	Female	1 1/4	NPT	Male	UL Listed, C-UL Listed	0000000	00000
1 1/2	Twist-In	Female	1 1/2	NPT	Male	UL Listed, C-UL Listed	0000000	00000
2	Twist-In	Female	2	NPT	Male	UL Listed, C-UL Listed	0000000	00000
Adapters with Grounding Lug and Locknut—Iron
3/8	Twist-In	Female	1/2	NPT	Male	UL Listed, CSA Certified	0000000	00000
1/2	Twist-In	Female	1/2	NPT	Male	UL Listed, CSA Certified	0000000	00000
3/4	Twist-In	Female	3/4	NPT	Male	UL Listed, CSA Certified	0000000	00000
1	Twist-In	Female	1	NPT	Male	UL Listed, CSA Certified	0000000	00000
1 1/4	Twist-In	Female	1 1/4	NPT	Male	UL Listed, CSA Certified	0000000	00000
1 1/2	Twist-In	Female	1 1/2	NPT	Male	UL Listed, CSA Certified	0000000	000000
2	Twist-In	Female	2	NPT	Male	UL Listed, CSA Certified	0000000	000000

90° Elbow Adapters

Adapter with Locknut

Adapter with Grounding Lug and Locknut

Conduit Connection			Electrical Box Connection
Conduit Trade Size	Conduit Connection Type	Gender	Pipe Size	Thread Type	Gender	Specifications Met		Each
Adapters with Locknut—Zinc-Plated Iron
3/8	Twist-In	Female	1/2	NPT	Male	UL Listed, CSA Certified	0000000	000000
1/2	Twist-In	Female	1/2	NPT	Male	UL Listed, CSA Certified	0000000	00000
3/4	Twist-In	Female	3/4	NPT	Male	UL Listed, CSA Certified	0000000	00000
1	Twist-In	Female	1	NPT	Male	UL Listed, CSA Certified	0000000	00000
1 1/4	Twist-In	Female	1 1/4	NPT	Male	UL Listed, CSA Certified	0000000	00000
1 1/2	Twist-In	Female	1 1/2	NPT	Male	UL Listed, CSA Certified	0000000	00000
2	Twist-In	Female	2	NPT	Male	UL Listed, CSA Certified	0000000	00000
Adapters with Grounding Lug and Locknut—Iron
3/8	Twist-In	Female	1/2	NPT	Male	UL Listed, CSA Certified	0000000	00000
1/2	Twist-In	Female	1/2	NPT	Male	UL Listed, CSA Certified	0000000	00000
3/4	Twist-In	Female	3/4	NPT	Male	UL Listed, CSA Certified	0000000	00000
1	Twist-In	Female	1	NPT	Male	UL Listed, CSA Certified	0000000	00000
1 1/4	Twist-In	Female	1 1/4	NPT	Male	UL Listed, CSA Certified	0000000	00000
1 1/2	Twist-In	Female	1 1/2	NPT	Male	UL Listed, CSA Certified	0000000	00000
2	Twist-In	Female	2	NPT	Male	UL Listed, CSA Certified	0000000	000000

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

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

NPT female straight connectors with glide insert have three pieces. The two outer pieces turn independently so you don't need to rotate the conduit.

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

Straight Connectors—Threaded Conduit Connection

Connector with Glide Insert

Conduit Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	Material	Features	Specifications Met		Each
Connector with Glide Insert
1/2	1/2	NPT	Female	Zinc-Plated Iron	Glide Insert	UL Listed	0000000	00000
3/4	3/4	NPT	Female	Zinc-Plated Iron	Glide Insert	UL Listed	0000000	0000
1	1	NPT	Female	Zinc-Plated Iron	Glide Insert	UL Listed	0000000	00000
1 1/4	1 1/4	NPT	Female	Zinc-Plated Iron	Glide Insert	UL Listed	0000000	00000
1 1/2	1 1/2	NPT	Female	Zinc-Plated Iron	Glide Insert	UL Listed	0000000	00000
2	2	NPT	Female	Zinc-Plated Iron	Glide Insert	UL Listed	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 female × NPSM male 90° elbow adapters are for tight spaces where conduit can't be bent.

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

90° Elbow 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	Specifications Met		Each
1/2	1/2	NPSM	Female	1/2	NPSM	Male	Iron	UL Listed	0000000	00000
3/4	3/4	NPSM	Female	3/4	NPSM	Male	Iron	UL Listed	0000000	0000
1	1	NPSM	Female	1	NPSM	Male	Iron	UL Listed, CSA Certified	0000000	00000
1 1/4	1 1/4	NPSM	Female	1 1/4	NPSM	Male	Iron	UL Listed, CSA Certified	0000000	00000
1 1/2	1 1/2	NPSM	Female	1 1/2	NPSM	Male	Iron	UL Listed, CSA Certified	0000000	000000
2	2	NPSM	Female	2	NPSM	Male	Iron	UL Listed, CSA Certified	0000000	000000

Access Ports for Metal Conduit

Also known as conduit bodies, these ports provide access to wire and cable inside conduit for pulling, splicing, and maintenance. They are also used to change the direction of a run. Connect to thick-wall (rigid) metal conduit. Aluminum and zinc-plated iron ports can connect to medium-wall (IMC) conduit.

All are corrosion resistant. 316 stainless steel ports offer the best corrosion resistance.

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

Straight (C)

Zinc-Plated Iron
Conduit Trade Size	Pipe Size	Thread Type	Gender	Features	Specifications Met		Each
1/2	1/2	NPT	Female	Removable Cover with Rubber Gasket	UL Listed, CSA Certified	0000000	000000
3/4	3/4	NPT	Female	Removable Cover with Rubber Gasket	UL Listed, CSA Certified	0000000	00000
1	1	NPT	Female	Removable Cover with Rubber Gasket	UL Listed, CSA Certified	0000000	00000
1 1/4	1 1/4	NPT	Female	Removable Cover with Rubber Gasket	UL Listed, CSA Certified	0000000	00000
1 1/2	1 1/2	NPT	Female	Removable Cover with Rubber Gasket	UL Listed, CSA Certified	0000000	00000
2	2	NPT	Female	Removable Cover with Rubber Gasket	UL Listed, CSA Certified	0000000	000000

Tee (T)

Zinc-Plated Iron
Conduit Trade Size	Pipe Size	Thread Type	Gender	Features	Specifications Met		Each
1/2	1/2	NPT	Female	Removable Cover with Rubber Gasket	UL Listed, CSA Certified	0000000	000000
3/4	3/4	NPT	Female	Removable Cover with Rubber Gasket	UL Listed, CSA Certified	0000000	00000
1	1	NPT	Female	Removable Cover with Rubber Gasket	UL Listed, CSA Certified	0000000	00000
1 1/2	1 1/2	NPT	Female	Removable Cover with Rubber Gasket	UL Listed, CSA Certified	0000000	00000
2	2	NPT	Female	Removable Cover with Rubber Gasket	UL Listed, CSA Certified	0000000	000000

90° Elbow (LB)

Zinc-Plated Iron
Conduit Trade Size	Pipe Size	Thread Type	Gender	Features	Specifications Met		Each
1/2	1/2	NPT	Female	Removable Cover with Rubber Gasket	UL Listed, CSA Certified	0000000	000000
3/4	3/4	NPT	Female	Removable Cover with Rubber Gasket	UL Listed, CSA Certified	0000000	00000
1	1	NPT	Female	Removable Cover with Rubber Gasket	UL Listed, CSA Certified	0000000	00000
1 1/4	1 1/4	NPT	Female	Removable Cover with Rubber Gasket	UL Listed, CSA Certified	0000000	00000
1 1/2	1 1/2	NPT	Female	Removable Cover with Rubber Gasket	UL Listed, CSA Certified	0000000	00000
2	2	NPT	Female	Removable Cover with Rubber Gasket	UL Listed, CSA Certified	0000000	000000

Snug-Hold Threaded-Rod-Mount Clamping Hangers

Load material between the two halves of the ring and adjust the side bolts for a tighter fit than standard threaded-rod-mount clamping hangers and loop hangers. All have a threaded hole on top for mounting with threaded rod.

Zinc-plated iron hangers have mild corrosion resistance.

Epoxy coated iron hangers are corrosion resistant and can be used with copper tubing.

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

ID
Inch	Metric, mm	For Pipe Size	For Thread Size	Cap., lbs.	Lg.	Wd.	Ht.	Mounting Hole Dia.	Specifications Met		Each
Iron
11/16"	17	3/8	3/8"-16	180	1 13/16"	9/16"	1 3/16"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	00000
7/8"	22	1/2	3/8"-16	180	2 1/16"	9/16"	1 3/8"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	0000
1 1/16"	27	3/4	3/8"-16	180	2 1/4"	9/16"	1 9/16"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	0000
1 5/16"	33	1	3/8"-16	180	2 11/16"	9/16"	1 15/16"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	0000
1 11/16"	43	1 1/4	3/8"-16	180	3"	9/16"	2 5/16"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	00000
1 7/8"	48	1 1/2	3/8"-16	180	3 5/16"	9/16"	2 9/16"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	00000
2 3/8"	60	2	3/8"-16	180	3 13/16"	9/16"	3"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	00000
2 7/8"	73	2 1/2	1/2"-13	300	4 3/4"	11/16"	3 5/8"	1/2"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	00000
3 1/2"	89	3	1/2"-13	300	5 9/16"	13/16"	4 5/16"	1/2"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	00000
4 1/2"	114	4	1/2"-13	300	6 11/16"	1 3/16"	5 1/2"	1/2"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	00000
Zinc-Plated Iron
11/16"	17	3/8	3/8"-16	180	1 13/16"	9/16"	1 3/16"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	0000
7/8"	22	1/2	3/8"-16	180	2 1/16"	9/16"	1 3/8"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	0000
1 1/16"	27	3/4	3/8"-16	180	2 1/4"	9/16"	1 9/16"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	0000
1 5/16"	33	1	3/8"-16	180	2 11/16"	9/16"	1 15/16"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	0000
1 11/16"	43	1 1/4	3/8"-16	180	3"	9/16"	2 5/16"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	00000
1 7/8"	48	1 1/2	3/8"-16	180	3 5/16"	9/16"	2 9/16"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	00000
2 3/8"	60	2	3/8"-16	180	3 13/16"	9/16"	3"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	00000
2 7/8"	73	2 1/2	1/2"-13	300	4 3/4"	11/16"	3 5/8"	1/2"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	00000
3 1/2"	89	3	1/2"-13	300	5 9/16"	13/16"	4 5/16"	1/2"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	00000
4 1/2"	114	4	1/2"-13	300	6 11/16"	1 3/16"	5 1/2"	1/2"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	00000
Epoxy Coated Iron
1/2"	12	__	3/8"-16	180	1 11/16"	9/16"	1"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	00000
5/8"	15	__	3/8"-16	180	1 3/4"	9/16"	1 1/4"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	00000
7/8"	22	__	3/8"-16	180	1 15/16"	9/16"	1 1/2"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	00000
1 1/8"	28	__	3/8"-16	180	2 1/4"	9/16"	1 13/16"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	00000
1 3/8"	34	__	3/8"-16	180	2 5/8"	9/16"	2"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	00000
1 5/8"	41	__	3/8"-16	180	2 15/16"	9/16"	2 1/4"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	00000
2 1/8"	53	__	3/8"-16	180	3 7/16"	9/16"	2 3/4"	3/8"	Fed. Spec. WW-H-171E, Type 25; MSS-SP-58-2009, Type 12	0000000	00000

Conduit Benders

Follow the easy-to-read markings to bend conduit to the angle you need.

Handles are labeled with a bending guide.

Cast Iron

Bending Heads
For Conduit Trade Size										Steel Handles
EMT	IMC	Rigid	Bend Radius	Angle Increments	Handle Socket Dia.	Lg.	Ht.		Each		Each
1/2	__	__	4 1/4"	10°, 22.5°, 30°, 45°, 60°, 90°	3/4"	7 3/4"	4 3/4"	000000	000000	0000000	000000
3/4	1/2	1/2	5 1/8"	10°, 22.5°, 30°, 45°, 60°, 90°	3/4"	9 1/2"	6"	000000	00000	0000000	00000
1	3/4	3/4	6 1/2"	10°, 22.5°, 30°, 45°, 60°, 90°	1"	12"	7 1/2"	000000	000000	0000000	00000
1 1/4	1	1	9 5/8"	10°, 22.5°, 30°, 45°, 60°, 90°	1 1/4"	17"	9 3/8"	000000	000000	0000000	00000