M20 Conduit | McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size	Show

M20

	Thread Size Thread Size	Hide

	Thread Type Thread Type

NPT

Metric

	Material Material

	Finish Finish

Nickel Plated

Zinc Plated

	Type Type


Adapter	Locknut

	Shape Shape


Straight	90° Elbow

45° Elbow

	Connection Type Connection Type


Conduit	Electrical Box

Cord Grip

	Conduit Trade Size Conduit Trade Size

3/8

1/2

	Gender Gender

Male

Female

	Environmental Rating Environmental Rating

IP66

IP68

IP69K

	Pipe Size Pipe Size

1/2

	Conduit Connection Type Conduit Connection Type


Threaded	Compression

Snap In

	Color Color

	Gray
	Black

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	Knockout Connection Type Knockout Connection Type

Threaded

	Minimum Temperature Minimum Temperature

-49° to 0° F

	Maximum Temperature Maximum Temperature

Less than 250° F

	Flexibility Flexibility

	Flexible

	Environment Environment

Damp

Dusty

High-Pressure Washdown

Submersible

Washdown

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Specifications Met Specifications Met

22 Products

About Conduit

Selecting U-Bolts Using Pipe, Conduit, or Tubing Trade Size

Adapters for Flexible Plastic Conduit

Tabs on one end snap into grooves in conduit; the other end attaches to a knockout in an outlet box or enclosure. These adapters help seal out air and liquid when used with flexible plastic conduit. All meet IP68 for prolonged submersion and IP69K for high-pressure, high-temperature washdowns. They withstand vibration, are flame retardant, and resist oil, solvents, and UV light.

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

Straight Adapters

Conduit Connection			Electrical Box Connection
Conduit Trade Size	Conduit Connection Type	Gender	Thread Size	Thread Type	Gender	Material	Color	Temperature Range, °F	Environmental Rating	Specifications Met		Each
Metric
1/2	Snap-In	Female	M20	Metric	Male	Nylon	Black	-40° to 245°	IP68, IP69K	UL 94 V-0, UL Recognized Component	0000000	00000

Long 90° Elbow Adapters

Conduit Connection			Electrical Box Connection
Conduit Trade Size	Conduit Connection Type	Gender	Thread Size	Thread Type	Gender	Material	Color	Temperature Range, °F	Environmental Rating	Specifications Met		Each
Metric
3/8	Snap-In	Female	M20	Metric	Male	Nylon	Black	-40° to 245°	IP68, IP69K	UL Recognized Component, UL 94 V-0	0000000	000000
1/2	Snap-In	Female	M20	Metric	Male	Nylon	Black	-40° to 245°	IP68, IP69K	UL Recognized Component, UL 94 V-0	0000000	00000

Standard 90° Elbow Adapters

Conduit Connection			Electrical Box Connection
Conduit Trade Size	Conduit Connection Type	Gender	Thread Size	Thread Type	Gender	Material	Color	Temperature Range, °F	Environmental Rating	Specifications Met		Each
Metric
1/2	Snap-In	Female	M20	Metric	Male	Nylon	Black	-40° to 245°	IP68, IP69K	UL Recognized Component, UL 94 V-0	0000000	000000

Standard 45° Elbow Adapters

Conduit Connection			Electrical Box Connection
Conduit Trade Size	Conduit Connection Type	Gender	Thread Size	Thread Type	Gender	Material	Color	Temperature Range, °F	Environmental Rating	Specifications Met		Each
Metric
3/8	Snap-In	Female	M20	Metric	Male	Nylon	Black	-40° to 245°	IP68, IP69K	UL Recognized Component, UL 94 V-0	0000000	000000
1/2	Snap-In	Female	M20	Metric	Male	Nylon	Black	-40° to 245°	IP68, IP69K	UL Recognized Component, UL 94 V-0	0000000	00000

Fittings for Shielded Flexible Plastic Conduit

Made of brass, these adapters provide electromagnetic interference (EMI) protection when connecting shielded flexible plastic conduit to a knockout in an outlet box or enclosure. Twist the compression end over the conduit; tighten the compression ring to secure.

A brass locknut is required (not included) when installing in an unthreaded knockout.

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

Straight Adapters
Conduit Connection			Electrical Box Connection								Locknuts
Conduit Trade Size	Conduit Connection Type	Gender	Thread Size	Thread Type	Gender	Material	Temp. Range, °F	Environmental Rating		Each		Each
1/2	Compression	Female	M20	Metric	Male	Brass	-40° to 245° F°	IP66	0000000	000000	0000000	00000

Locknuts for Metal Conduit Fittings

304 Stainless Steel

Brass

Secure threaded metal conduit fittings to a knockout in an outlet box or enclosure.

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

304 Stainless Steel
Thread Size	Specifications Met		Each
Metric Threads
M20	__	00000000	000000
Brass
Metric Threads
M20	DIN EN 60204	0000000	0000

Locknuts for Plastic Conduit Fittings

Nylon

Secure threaded plastic conduit fittings to a knockout in an outlet box or enclosure.

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

	Black		Gray
Thread Size		Each		Each
Nylon
Metric Threads
M20	0000000	00000	00000000	00000

Conduit and Cord Grip Thread Adapters

NPT × Metric

Metric × PG

PG × Metric

Adapt metric, NPT, and PG conduit and cord grip threads to match knockout threads. A rubber O-ring seals out moisture.

Nylon adapters are lightweight and chemical resistant.

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

Conduit and Cord Grip Connection				Electrical Box Connection			Nickel-Plated Brass		Nylon Plastic
Thread Size	Pipe Size	Thread Type	Gender	Thread Size	Thread Type	Gender		Each		Each
NPT × Metric
__	1/2	NPT	Female	M20	Metric	Male	000000	000000	0000000	000000
Metric × PG
M20	__	Metric	Female	PG-11	PG	Male	0000000	0000	000000	00
M20	__	Metric	Female	PG-13.5	PG	Male	0000000	0000	000000	00
M20	__	Metric	Female	PG-16	PG	Male	000000	00	0000000	00000
PG × Metric
PG-11	__	PG	Female	M20	Metric	Male	0000000	0000	000000	00
PG-13.5	__	PG	Female	M20	Metric	Male	0000000	0000	000000	00
PG-16	__	PG	Female	M20	Metric	Male	0000000	0000	000000	00

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 U-bolts have good corrosion resistance in most environments.

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

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

ID				Thread			Mounting Plate
Inch	Metric, mm	For Pipe Size	Ht.	Lg.	Pitch, mm	Ctr.-to-Ctr.	Material	Color	Lg.	Wd.	Thick.	No. of Nuts Included	Temp. Range, °F		Each
Zinc-Plated Steel
M20 Thread Size
8 3/4"	222	8	11 7/16"	4 15/16"	2.5	9 3/4"	Plastic	Green	12 3/8"	2"	31/32"	4	-20° to 190° F	00000000	000000
10 7/8"	276	10	13 9/16"	4 15/16"	2.5	11 7/8"	Plastic	Green	14 9/16"	2"	31/32"	4	-20° to 190° F	00000000	00000
12 15/16"	329	12	15 11/16"	4 15/16"	2.5	13 7/8"	Plastic	Green	16 9/16"	2 3/8"	1 3/16"	4	-20° to 190° F	00000000	00000