Set Screw Connectors | McMaster-Carr

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Conduit Trade Size

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Conduit Connection

Conduit Type

Pipe Size

Connects To

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Not Compliant

Export Control Classification Number (ECCN)

2B999

EAR99

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REACH

For Conduit Material

Conduit Body Designation

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Component

Height

Offset Length

Number of Cable Routing Holes

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112 Products

About Conduit

Adapters for Thin-Wall (EMT) Steel Conduit

Use these adapters to attach thin-wall (EMT) steel conduit to a knockout in an outlet box or enclosure. The screw-clamp end tightens around conduit with a screw.

Adapters with grommet protect wire and cable from abrasion when being pulled.

Straight Adapters—Zinc

Screw-Clamp

Conduit Connection		Electrical Box Connection
Conduit Trade Size	Gender	Pipe Size	Thread Type	Gender	Includes	Specifications Met		Each
Screw-Clamp Conduit Connection × Threaded Electrical Box Connection
1/2	Female	1/2	NPSM	Male	Grommet, Locknut	UL Listed, CSA Certified	0000000	00000
1/2	Female	1/2	NPSM	Male	Locknut	UL Listed, CSA Certified	0000000	000
3/4	Female	3/4	NPSM	Male	Grommet, Locknut	UL Listed, CSA Certified	0000000	0000
3/4	Female	3/4	NPSM	Male	Locknut	UL Listed, CSA Certified	0000000	0000
1	Female	1	NPSM	Male	Grommet, Locknut	UL Listed, CSA Certified	0000000	0000
1	Female	1	NPSM	Male	Locknut	UL Listed, CSA Certified	0000000	0000
1 1/4	Female	1 1/4	NPSM	Male	Grommet, Locknut	UL Listed, CSA Certified	0000000	0000
1 1/4	Female	1 1/4	NPSM	Male	Locknut	UL Listed, CSA Certified	0000000	0000
1 1/2	Female	1 1/2	NPSM	Male	Grommet, Locknut	UL Listed, CSA Certified	0000000	0000
1 1/2	Female	1 1/2	NPSM	Male	Locknut	UL Listed, CSA Certified	0000000	0000
2	Female	2	NPSM	Male	Grommet, Locknut	UL Listed, CSA Certified	0000000	0000
2	Female	2	NPSM	Male	Locknut	UL Listed, CSA Certified	0000000	0000
2 1/2	Female	2 1/2	NPSM	Male	Grommet, Locknut	UL Listed, CSA Certified	00000000	00000
2 1/2	Female	2 1/2	NPSM	Male	Locknut	UL Listed, CSA Certified	00000000	00000
3	Female	3	NPSM	Male	Grommet, Locknut	UL Listed, CSA Certified	00000000	00000
3	Female	3	NPSM	Male	Locknut	UL Listed, CSA Certified	00000000	00000
4	Female	4	NPSM	Male	Grommet, Locknut	UL Listed, CSA Certified	00000000	00000
4	Female	4	NPSM	Male	Locknut	UL Listed, CSA Certified	00000000	00000

Straight Adapters—Steel

Screw-Clamp

Conduit Connection		Electrical Box Connection
Conduit Trade Size	Gender	Pipe Size	Thread Type	Gender	Includes	Specifications Met		Each
Screw-Clamp Conduit Connection × Threaded Electrical Box Connection
1/2	Female	1/2	NPSM	Male	Grommet, Locknut	UL Listed, C-UL Listed	0000000	00000
1/2	Female	1/2	NPSM	Male	Locknut	UL Listed, C-UL Listed	0000000	000
3/4	Female	3/4	NPSM	Male	Grommet, Locknut	UL Listed, C-UL Listed	0000000	0000
3/4	Female	3/4	NPSM	Male	Locknut	UL Listed, C-UL Listed	0000000	000
1	Female	1	NPSM	Male	Grommet, Locknut	UL Listed, C-UL Listed	0000000	0000
1	Female	1	NPSM	Male	Locknut	UL Listed, C-UL Listed	0000000	0000
1 1/4	Female	1 1/4	NPSM	Male	Grommet, Locknut	UL Listed, C-UL Listed	0000000	0000
1 1/4	Female	1 1/4	NPSM	Male	Locknut	UL Listed, C-UL Listed	0000000	0000
1 1/2	Female	1 1/2	NPSM	Male	Grommet, Locknut	UL Listed, C-UL Listed	0000000	0000
1 1/2	Female	1 1/2	NPSM	Male	Locknut	UL Listed, C-UL Listed	0000000	0000
2	Female	2	NPSM	Male	Grommet, Locknut	UL Listed, C-UL Listed	0000000	0000
2	Female	2	NPSM	Male	Locknut	UL Listed, C-UL Listed	0000000	00000
2 1/2	Female	2 1/2	NPSM	Male	Grommet, Locknut	UL Listed, CSA Certified	00000000	00000
2 1/2	Female	2 1/2	NPSM	Male	Locknut	UL Listed, CSA Certified	00000000	00000
3	Female	3	NPSM	Male	Grommet, Locknut	UL Listed, CSA Certified	00000000	00000
3	Female	3	NPSM	Male	Locknut	UL Listed, CSA Certified	00000000	00000
4	Female	4	NPSM	Male	Grommet, Locknut	UL Listed, CSA Certified	00000000	00000
4	Female	4	NPSM	Male	Locknut	UL Listed, CSA Certified	00000000	00000

Offset Elbow Adapters—Zinc

Conduit Connection		Electrical Box Connection
Conduit Trade Size	Gender	Pipe Size	Thread Type	Gender	Offset Lg.	Includes	Specifications Met		Each
Screw-Clamp Conduit Connection × Threaded Electrical Box Connection
1/2	Female	1/2	NPSM	Male	3/8"	Locknut	UL Listed, CSA Certified	0000000	00000
3/4	Female	3/4	NPSM	Male	3/4"	Locknut	UL Listed, CSA Certified	0000000	0000
1	Female	1	NPSM	Male	1"	Locknut	UL Listed	0000000	00000

Connectors for Thin-Wall (EMT) Steel Conduit

Join pieces of thin-wall (EMT) steel conduit. Screw-clamp ends tighten around conduit with screws.

Straight Connectors—Zinc

Screw-Clamp

Conduit Connection
Conduit Trade Size	Gender	Specifications Met		Each
Screw-Clamp Conduit Connection
1/2	Female	UL Listed, CSA Certified	0000000	00000
3/4	Female	UL Listed, CSA Certified	0000000	0000
1	Female	UL Listed, CSA Certified	0000000	0000
1 1/4	Female	UL Listed, CSA Certified	0000000	0000
1 1/2	Female	UL Listed, CSA Certified	0000000	0000
2	Female	UL Listed, CSA Certified	0000000	0000
2 1/2	Female	UL Listed, CSA Certified	00000000	00000
3	Female	UL Listed, CSA Certified	00000000	00000
4	Female	UL Listed, CSA Certified	00000000	00000

Straight Connectors—Steel

Screw-Clamp

Conduit Connection
Conduit Trade Size	Gender	Specifications Met		Each
Screw-Clamp Conduit Connection
1/2	Female	UL Listed, C-UL Listed	0000000	00000
3/4	Female	UL Listed, C-UL Listed	0000000	000
1	Female	UL Listed, C-UL Listed	0000000	0000
1 1/4	Female	UL Listed, C-UL Listed	0000000	0000
1 1/2	Female	UL Listed, C-UL Listed	0000000	0000
2	Female	UL Listed, C-UL Listed	0000000	0000
2 1/2	Female	UL Listed, CSA Certified	00000000	00000
3	Female	UL Listed, CSA Certified	00000000	00000
4	Female	UL Listed, CSA Certified	00000000	00000

Reducers for Thin-Wall (EMT) Steel Conduit

Connect different sizes of thin-wall (EMT) steel conduit. These reducers have screw-clamp ends that tighten around conduit with screws.

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

Conduit Connection
Conduit Trade Size - 1	Conduit Trade Size - 2 and - 3	Conduit Connection Type	Gender	Material	Specifications Met		Each
3/4	1/2	Screw-Clamp	Female	Zinc	UL Listed, C-UL Listed	0000000	000000
1	3/4	Screw-Clamp	Female	Zinc	UL Listed, C-UL Listed	0000000	00000

Adapters for Thin-Wall (EMT) Stainless Steel Conduit

Screw-Clamp
Conduit × Threaded
Electrical Box Adapter

Attach thin-wall (EMT) stainless steel conduit to a knockout in an outlet box or enclosure. All of these adapters are corrosion resistant, so you can use them in food-processing and chemical plants.

The screw-clamp end tightens around conduit with a screw.

Conduit Connection		Electrical Box Connection
Conduit Trade Size	Gender	Pipe Size	Thread Type	Gender	Material		Each
Screw-Clamp Conduit Connection × Threaded Electrical Box Connection
1/2	Female	1/2	NPT	Male	316 Stainless Steel	0000000	000000
3/4	Female	3/4	NPT	Male	316 Stainless Steel	0000000	00000
1	Female	1	NPT	Male	316 Stainless Steel	0000000	00000
2	Female	2	NPT	Male	316 Stainless Steel	0000000	000000

Connectors for Thin-Wall (EMT) Stainless Steel Conduit

Join pieces of thin-wall (EMT) stainless steel conduit. All of these connectors are corrosion resistant, so you can use them in food-processing and chemical plants.

Screw-clamp ends tighten around conduit with screws.

Straight Connectors

Screw-Clamp Straight Connector

Conduit Connection
Conduit Trade Size	Gender	Material		Each
Screw-Clamp Conduit Connection
1/2	Female	316 Stainless Steel	0000000	000000
3/4	Female	316 Stainless Steel	0000000	00000
1	Female	316 Stainless Steel	0000000	00000

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. Ports with a set screw also connect to thin-wall (EMT) steel conduit without a compression connector.

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

90° elbow ports with two removable covers are UL listed raintight for thick-wall (rigid) steel conduit.

Ports that can be configured as a straight, tee, or 90° elbow come with multiple cover plates for openings not in use. They are UL listed raintight for thick-wall (rigid) conduit and concrete-tight for thin-wall (EMT) conduit.

Straight (C)

Aluminum
Conduit Trade Size	Pipe Size	Thread Type	Gender	Features	Includes	Specifications Met		Each
1/2	1/2	NPSM	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	00000
3/4	3/4	NPSM	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	0000
1	1	NPSM	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	00000
1 1/4	1 1/4	NPSM	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	00000
1 1/2	1 1/2	NPSM	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	00000
2	2	NPSM	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	00000

Tee (T)

Aluminum
Conduit Trade Size	Pipe Size	Thread Type	Gender	Features	Includes	Specifications Met		Each
1/2	1/2	NPSM	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	00000
3/4	3/4	NPSM	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	0000
1	1	NPSM	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	00000
1 1/4	1 1/4	NPSM	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	00000
1 1/2	1 1/2	NPSM	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	00000
2	2	NPSM	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	00000

90° Elbow (LB)

Aluminum
Conduit Trade Size	Pipe Size	Thread Type	Gender	Features	Includes	Specifications Met		Each
1/2	1/2	NPSM	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	00000
3/4	3/4	NPSM	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	0000
1	1	NPSM	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	00000
1 1/4	1 1/4	NPSM	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	00000
1 1/2	1 1/2	NPSM	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	00000
2	2	NPSM	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	00000

90° Elbow (LL, LR)

Aluminum
Conduit Trade Size	Pipe Size	Thread Type	Gender	Features	Includes	Specifications Met		Each
1/2	1/2	NPT	Female	Two Removable Covers with Rubber Gasket	Set Screw	UL Listed, C-UL Listed	0000000	000000
3/4	3/4	NPT	Female	Two Removable Covers with Rubber Gasket	Set Screw	UL Listed, C-UL Listed	0000000	00000
1	1	NPT	Female	Two Removable Covers with Rubber Gasket	Set Screw	UL Listed, C-UL Listed	0000000	00000
1 1/4	1 1/4	NPT	Female	Two Removable Covers with Rubber Gasket	Set Screw	UL Listed, C-UL Listed	0000000	00000
1 1/2	1 1/2	NPT	Female	Two Removable Covers with Rubber Gasket	Set Screw	UL Listed, C-UL Listed	0000000	00000
2	2	NPT	Female	Two Removable Covers with Rubber Gasket	Set Screw	UL Listed, C-UL Listed	0000000	000000

Straight, Tee, or 90° Elbow (C, T, LB, LL, LR)

Aluminum
Conduit Trade Size	Pipe Size	Thread Type	Gender	Features	Includes	Specifications Met		Each
1/2	1/2	NPT	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	000000
3/4	3/4	NPT	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	00000
1	1	NPT	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	00000
1 1/4	1 1/4	NPT	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	00000
1 1/2	1 1/2	NPT	Female	Removable Cover with Rubber Gasket	Set Screw	UL Listed, CSA Certified	0000000	00000
2	2	NPT	Female	Removable Cover with Rubber Gasket	Set Screw	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.

Screw-clamp ends tighten around conduit with screws.

Straight Connectors—Screw-Clamp Conduit Connection

Conduit Connection
Conduit Trade Size	Gender	Material	Specifications Met		Each
Connector
1/2	Female	Zinc-Plated Steel	UL Listed	0000000	000000
3/4	Female	Zinc-Plated Steel	UL Listed	0000000	00000
1	Female	Zinc-Plated Steel	UL Listed	0000000	00000
1 1/4	Female	Zinc-Plated Steel	UL Listed	00000000	00000
1 1/2	Female	Zinc-Plated Steel	UL Listed	00000000	00000
2	Female	Zinc-Plated Steel	UL Listed	00000000	00000

Service Entrance Weatherheads

Create a connection point to route overhead service wire and cable from utility poles to electrical meters, bringing power to buildings. Protected by a rounded hood and plastic insulators in unused routing holes, these weatherheads meet NEMA 3R for protection from falling rain, sleet, snow, and dirt, as well as light splashing. Made of aluminum, they resist corrosion in outdoor conditions and are lightweight for easy installation. All meet UL safety standards for conduit, tubing, and cable fittings.

Conduit Connection
Conduit Trade Size	Conduit Connection Type	Gender	For Maximum Cable OD (Number of)	Length	Width	Height	Insulation Material	Includes	Environmental Rating	Specifications Met		Each
For EMT, IMC, RMC Conduit
Aluminum
1/2	Screw Clamp	Female	19/64" (4)	2 11/16 "	2 1/4"	2 3/4"	Plastic	Set Screws	NEMA 3R	UL Listed, UL 514B	0000000	000000
3/4	Screw Clamp	Female	3/8" (2), 13/32" (3)	3 1/16 "	2 7/16"	2 3/4"	Plastic	Set Screws	NEMA 3R	UL Listed, UL 514B	0000000	00000
1	Screw Clamp	Female	1/2" (3), 7/16" (2)	3 3/8 "	2 3/4"	3 1/16"	Plastic	Set Screws	NEMA 3R	UL Listed, UL 514B	0000000	00000
1 1/4	Screw Clamp	Female	5/8" (3), 7/16" (2)	4 3/16 "	3 1/16"	3 1/2"	Plastic	Set Screws	NEMA 3R	UL Listed, UL 514B	0000000	00000
1 1/2	Screw Clamp	Female	3/4" (3), 19/32" (2), 7/16" (1)	5 1/16 "	3 3/4"	4 3/8"	Plastic	Set Screws	NEMA 3R	UL Listed, UL 514B	0000000	00000
2	Screw Clamp	Female	1" (3), 3/4" (2), 17/32" (1)	6 11/16 "	4 1/4"	5 7/8"	Plastic	Set Screws	NEMA 3R	UL Listed, UL 514B	0000000	00000
2 1/2	Screw Clamp	Female	1 5/16" (3), 7/8" (3), 1" (1)	9 1/4 "	6 5/16"	7"	Plastic	Set Screws	NEMA 3R	UL Listed, UL 514B	0000000	000000
3	Screw Clamp	Female	1 5/16" (3), 7/8" (3), 1" (1)	10 15/16 "	7 3/4"	7 1/4"	Plastic	Set Screws	NEMA 3R	UL Listed, UL 514B	0000000	000000
4	Screw Clamp	Female	1 3/4" (3), 1 1/8" (4)	12 3/4 "	7 3/4"	8 5/8"	Plastic	Set Screws	NEMA 3R	UL Listed, UL 514B	0000000	000000

Service Entrance Weatherhead Kits

Create a weatherproof entry point into a building for service cables and telephone lines—these kits have all the supplies you need. They meet NEMA 3R for protection from falling rain, sleet, snow, and dirt. They also handle light splashing from the side. The weatherhead has a rounded hood and plastic insulators in its routing holes to protect your wiring from water. Made of aluminum, it resists corrosion. It’s also lightweight, so it’s easy to install. To keep your roof watertight, the roof flashing directs water away from the point your conduit enters.

The included weatherhead, wire holders, and conduit supports meet UL safety standards for conduit, tubing, and cable fittings.

Conduit Connection				Weatherhead
Conduit Trade Size	Conduit Connection Type	Gender	For Max. Cable OD (Number of)	Lg.	Wd.	Ht.	Insulation Material	Component (Specifications Met)	Includes	Environmental Rating		Each
For EMT, IMC, RMC Conduit
Aluminium
2	Screw Clamp	Female	1" (3), 3/4" (2), 17/32" (1)	6 3/4"	4 5/8"	6"	Plastic	Weatherhead (UL Listed)—E148715 Wire Holders (UL Listed)—E58921 Roof Flashing Conduit Supports (UL Listed)—E58921	Set Screws	NEMA 3R	0000000	000000