M20 Nipples | McMaster-Carr

Clear All

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size	Show

M20

	Thread Size Thread Size	Hide

	Thread Type Thread Type

BSPP

Metric

UN/UNF (JIC)

	Thread Pitch Thread Pitch

1.5 mm

	Pipe Size Pipe Size

3/8

1/2

3/4

	Type Type

	Adapter

	Shape Shape

	Straight

	Material Material

	Gender Gender

Male

Female

	For Use With For Use With

	Connection Style Connection Style

Threaded

Barbed

Flared

	Dash Size Dash Size

	Length Length

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

DFARS Specialty Metals
COTS-Exempt

	Gasket Material Gasket Material

Rubber

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

RoHS Compliant

RoHS Compliant with
Exemptions

	Maximum Pressure Maximum Pressure

	Connection Type Connection Type


Pipe	Hose

Tube

	Specifications Met Specifications Met

DIN

ISO

SAE

	Fabrication Fabrication

Machined

	Washer Material Washer Material

316 Stainless Steel

Steel

	Hex Width Hex Width

27mm

32mm

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

REACH Compliant

Forward

How can we improve?

20 Products

How to Identify and Measure Fittings

Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.

Extreme-Pressure Stainless Steel Threaded Pipe Fittings

With the strength to handle extreme pressures, these fittings can be used to connect equipment in hydraulic fluid lines. 316 stainless steel fittings have excellent corrosion resistance. BSPP and metric male threads have either a gasket or a gasket and washer to prevent leaks.

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

Straight Adapters, Male

Front

BSPP and Metric
Male Threads with
Gasket and Washer

For Use With: See table
Specifications Met: See table

						316 Stainless Steel
Pipe Size (A)	Dash Size (A)	Thread Size (B)	Max. Pressure	For Use With	Specifications Met		Each
BSPP Male × Metric Male
3/8	06	M20 × 1.5 mm	5,000 psi @ 72° F	Hydraulic Fluid, Oil, Water	DIN 7631, ISO 1179, ISO 8434-6, ISO 9974	00000000	000000
1/2	08	M20 × 1.5 mm	4,500 psi @ 72° F	Hydraulic Fluid, Oil, Water	DIN 7631, ISO 1179, ISO 8434-6, ISO 9974	00000000	00000
3/4	12	M20 × 1.5 mm	3,600 psi @ 72° F	Hydraulic Fluid, Oil, Water	DIN 7631, ISO 1179, ISO 8434-6, ISO 9974	00000000	00000

Replacement Washers

Temperature Range: -22° to 230° F

			316 Stainless Steel
For Pipe Size	For Thread Size	Gasket Material	Thickness		Each
For BSPP Male
3/8	__	Buna-N Rubber	2mm	00000000	00000
1/2	__	Buna-N Rubber	2.5mm	00000000	0000
3/4	__	Buna-N Rubber	2.5mm	00000000	0000
For Metric Male
__	M20	Buna-N Rubber	1.5mm	00000000	00000

Compact Extreme-Pressure Steel Threaded Pipe Fittings

These fittings are strong enough to handle extreme pressures, yet small enough to fit into cramped spaces. They are galvanized steel, which has fair corrosion resistance. BSPP and metric male threads have either a gasket, or a gasket and washer, to prevent leaks.

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

Straight Adapters, Male

BSPP, Metric, and UN/UNF
(SAE Straight) Male
Threads with Gasket and Washer

For Use With: See table
Specifications Met: See table

BSPP Male × Metric Male
Pipe Size (A)	Dash Size (A)	Thread Size (B)	Max. Pressure	For Use With	Specifications Met		Each
1/2	08	M20 × 1.5 mm	4,500 psi @ 72° F	Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Oil, Water	DIN 7631, ISO 1179, ISO 6149, ISO 8434-6, ISO 9974	00000000	000000

Replacement Washers

Temperature Range: -20° to 230° F

For BSPP Male
For Pipe Size	For Thread Size	Gasket Material	Thickness		Each
1/2	__	Buna-N Rubber	2.5mm	00000000	00000
For Metric Male
__	M20	Buna-N Rubber	1.5mm	00000000	0000

Metal Barbed Hose Fittings for Air and Water

Slide the barbed end into rubber hose and secure with the appropriate clamp or crimp-on hose ferrule.

Brass fittings are softer than other metal fittings, so they’re easier to thread together. Plain brass fittings have good corrosion resistance.Aluminum fittings are lighter in weight than other metal fittings. They have good corrosion resistance.

Fittings with a threaded end are also known as hose nipples.

Metric, UN/UNF (SAE Straight), and BSPP male threads with gasket protect against leaks.

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

Straight Adapters, Hose × Metric Male Threaded Pipe

NPT/NPTF, Metric, BSPP, and
UN/UNF (SAE Straight)
Male Threads with Gasket

Maximum Pressure: See table
Maximum Vacuum: 27 in. of Hg @ 72° F
Temperature Range: See table
Attachment Type: See table
Specifications Met: See table

Brass
For Hose ID	Thread Size	Gasket Material	Max. Pressure	Temperature Range, °F	Attachment Type	Pkg. Qty.		Pkg.
3/4"	M20 × 1.5 mm	Buna-N Rubber	300 psi @ 72° F	-30° to 200°	Worm-Drive Clamp, Band-and-Buckle Clamp, Crimp-On Hose Ferrule	1	00000000	000000
19mm	M20 × 1.5 mm	Buna-N Rubber	250 psi @ 72° F	-30° to 200°	Worm-Drive Clamp, Band-and-Buckle Clamp, Crimp-On Hose Ferrule	1	00000000	00000
Aluminum
3/4"	M20 × 1.5 mm	Buna-N Rubber	125 psi @ 72° F	-30° to 200°	Worm-Drive Clamp, Band-and-Buckle Clamp, Crimp-On Hose Ferrule	1	00000000	00000
19mm	M20 × 1.5 mm	Buna-N Rubber	125 psi @ 72° F	-30° to 200°	Worm-Drive Clamp, Band-and-Buckle Clamp, Crimp-On Hose Ferrule	1	00000000	00000

37° Flared Fittings for Steel Tubing

Tubing: Use with seamless steel
Specifications Met: SAE J514

Also known as JIC (Joint Industrial Council) fittings, these provide a tight metal-to-metal seal on tubing that is flared to 37°. They require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately. Fittings are zinc-plated steel for fair corrosion resistance.

To prevent leaks, UN/UNF (SAE Straight) male threads have a gasket. Metric and BSPP male threads have either a gasket or a gasket and washer.

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

Straight Adapters, Male Tube × Male Threaded Pipe

For Use With: See Table
Temperature Range: See Table

Metric Threads
For Tube OD	Thread Size	Thread Pitch, mm	For Use With	Material	Gasket Material	Max. Pressure	Temp. Range, °F		Each
5/8"	M20	1.5	Air, Fuel Oil, Hydraulic Fluid, Mineral Oil	Zinc-Plated Steel	Buna-N Rubber	2,300 psi @ 72° F	-30° to 200°	00000000	000000

Nuts

For Use With: Air, Fuel Oil, Hydraulic Fluid, Mineral Oil
Temperature Range: -60° to 400° F

For Tube OD	Nut Material	Max. Pressure		Each
5/8"	Zinc-Plated Steel	3,000 psi @ 72° F	000000000	00000

Sleeves

For Use With: Air, Fuel Oil, Hydraulic Fluid, Mineral Oil
Temperature Range: -60° to 400° F

Use these sleeves with a nut and fitting to provide a tight metal-to-metal seal on steel tubing that is flared to 37°. Sleeves are zinc-plated steel for fair corrosion resistance. They are also known as ferrules.

Inch × metric sleeve adapters convert the fitting from inch to metric.

For Tube OD
Inch	Metric, mm	Sleeve Material	Max. Pressure		Each
Inch Sleeves
5/8"	__	Zinc-Plated Steel	3,000 psi @ 72° F	000000000	00000
Inch × Metric Sleeve Adapters
5/8"	14	Zinc-Plated Steel	3,000 psi @ 72° F	000000000	0000
5/8"	16	Zinc-Plated Steel	3,000 psi @ 72° F	000000000	0000

Grease Fitting Adapters

When the size or thread type of a fitting doesn't match an existing opening, use these adapters to make the connection.

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

Straight

Connection
Male	Female	Material		Each
Metric M22 × 1.5 mm	Metric M20 ×1.5mm	Steel	00000000	000000