M16 Conduit | McMaster-Carr

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For Conduit Flexibility

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High-Pressure Washdown

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

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Less than 250° F

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16 Products

About Conduit

Compare rigid and flexible conduit materials and identify the trade size for compatible fittings.

Conduit and Cord Grip Thread Adapters

Connect mismatched conduit and cord grip threads while sealing out moisture. These adapters have a rubber O-ring that prevents water damage inside your electrical box or enclosure. They convert metric, NPT, and PG threads.

Nickel-Plated Brass—The plating enhances the corrosion resistance of brass, adding a durable protective finish.

Nylon—Lightweight and chemical resistant, these fittings won't corrode.

	Conduit Connection			Knockout Connection
	Pipe Size	Thread Size	Gender	Thread Size	Gender	Temp., ° F		Each
NPT × Metric







				Nickel-Plated Brass

				1/2	—	Female	M16	Male	-40 to 210	7537K1	000000




						Nylon

						1/2	—	Female	M16	Male	0 to 175	7805K55	0000


						Metric × PG







										Nickel-Plated Brass

										—	M16	Female	PG-9	Male	-40 to 210	7805K18	0000




												Nylon

												—	M16	Female	PG-9	Male	0 to 175	7805K36	00000


												PG × Metric







																Nickel-Plated Brass

																—	PG-9	Female	M16	Male	-40 to 210	7805K11	0000

Flexible Plastic (MPT) Conduit and Fittings

Bend, twist, and wrap machine wiring through tight spaces. Corrugated like ENT, this conduit is more resilient against repeated flexing. Pair it with compatible fittings to seal out liquid and protect wiring indoors and outdoors. Conduit and fittings are made of nylon to resist moisture and chemicals.

Straight Electrical Box Connectors

Snap-In ×

Threaded

Attach conduit to a knockout in an electrical box.

	Straights										Locknuts
	Conduit Connection		Knockout Connection
	Conduit Trade Size	Gender	Thread Type	Gender	Color	Temp., ° F	Enclosure Rating	Specs. Met		Each		Each
Snap-In Conduit Connection × Threaded Knockout Connection







				Nylon

				5/16	Female	Metric (M16)	Male	Black	-40 to 245	IP68, IP69K	UL Recognized Component, UL 94 V-0	6963T93	00000	7877N128	00000


				3/8	Female	Metric (M16)	Male	Black	-40 to 245	IP68, IP69K	UL Recognized Component, UL 94 V-0	6963T94	0000	7877N128	0000

90° Elbow Electrical Box Connectors

Snap-In ×

Threaded

Change the direction of your run to connect to a knockout in an electrical box.

	Elbows											Locknuts
	Conduit Connection		Knockout Connection
	Conduit Trade Size	Gender	Thread Type	Gender	Lg.	Color	Temp., ° F	Enclosure Rating	Specs. Met		Each		Each
Snap-In Conduit Connection × Threaded Knockout Connection







				Nylon

				3/8	Female	Metric (M16)	Male	1 5/8"	Black	-40 to 245	IP68, IP69K	UL Recognized Component, UL 94 V-0	6963T48	000000	7877N128	00000

EMI-Shielding Flexible Plastic (MPT) Conduit and Fittings

A braided copper cover defends against electromagnetic interference (EMI) that can distort or disrupt signals. Install shielded MPT in areas where motors, generators, and other equipment that emit EMI are running. It has a corrugated nylon core that flexes to make tight bends and is typically used indoors. Pair conduit with nickel-plated brass connectors for a fully shielded run.

Straight Electrical Box Connectors

Compression

× Threaded

Attach conduit to a knockout in an electrical box.

	Straights								Locknuts
	Conduit Connection		Knockout Connection
	Conduit Trade Size	Gender	Thread Type	Gender	Temp., ° F	Enclosure Rating		Each		Each
Compression Conduit Connection × Threaded Knockout Connection







				Nickel-Plated Brass

				3/8	Female	Metric (M16)	Male	-40 to 245	IP66	9147T12	000000	9147T18	00000

Conduit Locknuts

Secure threaded conduit fittings to knockouts. These locknuts keep fittings from shifting, so connections stay stable and wiring is protected inside electrical boxes or enclosures.

For Metal and Plastic Fittings

304 Stainless Steel—The choice for wet and outdoor environments.

Nickel-Plated Brass—The plating enhances the corrosion resistance of brass, adding a durable protective finish.

	Each
Metric Thread







	304 Stainless Steel

	M16	—	7513K134	000000




			Nickel-Plated Brass

			M16	EN 60204	9147T18	0000

For Plastic Fittings

Nylon—Lightweight and chemical resistant, these fittings won't corrode.


Metric Thread







	Nylon

	M16	7877N128	00000


	M16	7877N129	0000

Clamping U-Bolts

With Plastic Mounting

Plate

Also known as muffler clamps, these U-bolts have a rounded mounting plate that fully surrounds pipe, conduit, and tubing for a secure fit. Stronger than routing clamps and hangers, U-bolts support heavy pipe, tube, and conduit from ceilings, walls, and poles.

Zinc-Plated Steel—Zinc-plated steel U-bolts have good corrosion resistance in most environments.

4 Nuts Included—U-bolts with four nuts allow you to secure the U-bolt from the top and the bottom.

	ID				Thread				Mounting Plate
	Inch	Metric, mm	For Pipe Size	Ht.	Lg.	Pitch, mm	Wt. Cap.	Ctr.-to-Ctr.	Material	Color	Lg.	Wd.	Thk.	No. of Nuts Included	Temp. Range, ° F	Pkg. Qty.		Pkg.
Zinc-Plated Steel







				M16 Threads

				4.75"	121	4	6 1/8"	3 3/16"	2	Not Rated	5 3/8"	Plastic	Black	7 1/2"	1 9/16"	13/16"	4	-20 to 190	1	3066T38	000000


				5.8125"	148	5	6 15/16"	3 3/16"	2	Not Rated	6 7/16"	Plastic	Black	8 11/16"	1 9/16"	13/16"	4	-20 to 190	1	3066T59	00000
				6.9375"	176	6	7 15/16"	3 3/16"	2	Not Rated	7 9/16"	Plastic	Black	10"	1 15/16"	1"	4	-20 to 190	1	3066T41	00000