M12 Nipples | McMaster-Carr

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61 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
1/4	04	M12 × 1.5 mm	5,000 psi @ 72° F	Hydraulic Fluid, Oil, Water	DIN 7631, ISO 1179, ISO 8434-6, ISO 9974	00000000	000000

Replacement Washers

Temperature Range: -22° to 230° F

			316 Stainless Steel
For Pipe Size	For Thread Size	Gasket Material	Thickness		Each
For BSPP Male
1/4	__	Buna-N Rubber	2.03mm	00000000	00000
For Metric Male
__	M12	Buna-N Rubber	1.5mm	00000000	0000

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 and zinc-plated steel, which have better corrosion resistance than plain steel fittings. 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

NPT Male × Metric Male
Pipe Size (A)	Dash Size (A)	Thread Size (B)	Max. Pressure	Material	For Use With	Specifications Met		Each
1/8	02	M12 × 1.5 mm	5,000 psi @ 72° F	Galvanized Steel	Air, Hydraulic Fluid, Oil, Water	ASME B1.20.3, DIN 2353, ISO 8434-1	00000000	000000
BSPP Male × Metric Male
1/4	04	M12 × 1.5 mm	6,000 psi @ 72° F	Galvanized Steel	Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Oil, Water	DIN 7631, ISO 1179, ISO 6149, ISO 8434-6, ISO 9974	00000000	00000
3/8	06	M12 × 1.5 mm	5,500 psi @ 72° F	Galvanized Steel	Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Oil, Water	DIN 7631, ISO 1179, ISO 6149, ISO 8434-6, ISO 9974	00000000	00000

Replacement Washers

Temperature Range: -20° to 230° F

For BSPP Male
For Pipe Size	For Thread Size	Gasket Material	Thickness		Each
1/4	__	Buna-N Rubber	2.03mm	00000000	00000
3/8	__	Buna-N Rubber	2mm	00000000	000
For Metric Male
__	M12	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. Nickel-plated brass fittings resist corrosion better than plain brass fittings.

Aluminum fittings are lighter in weight than other metal fittings. They have good corrosion resistance.

Stainless steel fittings have very good corrosion resistance. 303 stainless steel fittings won’t rust when exposed to water, making them good for areas that require frequent cleanings. 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	Specifications Met	Pkg. Qty.		Pkg.
1/4"	M12 × 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
3/8"	M12 × 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	00000
1/2"	M12 × 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	00000
3/4"	M12 × 1.5 mm	__	250 psi @ 72° F	-40° to 160°	Worm-Drive Clamp, Crimp-On Hose Ferrule	SAE J476	1	0000000	00000
6mm	M12 × 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	00000
8mm	M12 × 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	00000
9mm	M12 × 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	00000
10mm	M12 × 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	00000
12mm	M12 × 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
13mm	M12 × 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
19mm	M12 × 1.5 mm	__	250 psi @ 72° F	-40° to 160°	Worm-Drive Clamp, Crimp-On Hose Ferrule	SAE J476	1	0000000	00000
Nickel-Plated Brass
1/4"	M12 × 1.5 mm	Buna-N Rubber	125 psi @ 72° F	-20° to 200°	Worm-Drive Clamp, Band-and-Buckle Clamp, Crimp-On Hose Ferrule	__	1	00000000	00000
12mm	M12 × 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	0000000	00000
13mm	M12 × 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
Aluminum
1/4"	M12 × 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
3/8"	M12 × 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
1/2"	M12 × 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
3/4"	M12 × 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
10mm	M12 × 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
12mm	M12 × 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
303 Stainless Steel
1/4"	M12 × 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
3/8"	M12 × 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
1/2"	M12 × 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

Metal Barbed Hose Fittings for Chemicals and Petroleum

Made of stainless steel, these fittings stand up to a wide variety of chemicals, as well as fuels, gasoline, and oils. To connect, slide the barbed end into plastic or rubber hose and secure with a clamp.

Adapters are also known as hose nipples; they adapt a barbed end to a threaded end.

Metric and UN/UNF (SAE Straight) male threads have a gasket to protect against leaks.

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

Straight Adapters, Hose × Metric Male Threaded Pipe

For Use With: See table
Maximum Pressure: See table
Temperature Range: -40° to 300° F
Attachment Type: Use Band-and-Buckle Clamps

	Thread
For Hose ID	Size	Pitch, mm	Gasket Material	Max. Pressure	For Use With		Each
316 Stainless Steel
3/8"	M12	1.5	Fluoroelastomer Rubber	125 psi @ 72° F	Acetone, Diesel Fuel, Ethanol, Fuel Oil, Gasoline, Mineral Oil, Mineral Spirits, Vegetable Oil	000000000	000000
8mm	M12	1.5	Fluoroelastomer Rubber	125 psi @ 72° F	Acetone, Diesel Fuel, Ethanol, Fuel Oil, Gasoline, Mineral Oil, Mineral Spirits, Vegetable Oil	000000000	00000

Push-On Barbed Hose Fittings for Hydraulic Fluid

These fittings have sharp barbs to grip rubber push-on hose with no clamps or ferrules required. The more you pull on the fittings, the tighter the hose will grip. Use them in low-pressure hydraulic applications up to 350 psi. Also known as hose nipples, they adapt a barbed end to a threaded end, so you can connect to pumps, cylinders, and other equipment in your hydraulic system. Fittings are zinc-plated steel, which has excellent strength and durability. Fittings have fair corrosion resistance.

Note: To ensure proper connection, the barbed end has to be pushed in all the way, with the hose end concealed by the ring.

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

Straight Adapters, Hose × Metric Male Threaded Pipe

Maximum Pressure: 350 psi @ 72° F
Maximum Vacuum: 28 in. of Hg @ 72° F
Temperature Range: -40° to 255° F
For Hose Manufacturer Series: Parker 801

Fittings
		Thread		Ring Stop					10-ft. Hose
For Hose ID	Dash Size	Size	Pitch, mm	Material	Color	Manufacturer Series		Each		Each
Zinc-Plated Steel
1/4"	04	M12	1.5	Plastic	Yellow	Parker 82	00000000	000000	0000000	000000

37° Flared Fittings for Steel Tubing

BSPP and Metric
Male Threads with
Gasket and Washer

For Use With: Air, Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil
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

BSPP and Metric
Male Threads with
Gasket and Washer

Temperature Range: See table

Metric Threads
For Tube OD	Thread Size	Thread Pitch, mm	Material	Gasket Material	Washer Material	Max. Pressure	Temp. Range, °F		Each
1/4"	M12	1.5	Zinc-Plated Steel	Buna-N Rubber	__	3,600 psi @ 72° F	-30° to 200°	00000000	000000
1/4"	M12	1.5	Zinc-Plated Steel	Buna-N Rubber	Zinc-Plated Steel	4,500 psi @ 72° F	-20° to 212°	00000000	00000

Sleeves

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
1/4"	__	Zinc-Plated Steel	4,500 psi @ 72° F	000000000	00000
Inch × Metric Sleeve Adapters
1/4"	6	Zinc-Plated Steel	4,500 psi @ 72° F	000000000	0000

Nuts

Temperature Range: -60° to 400° F

For Tube OD	Nut Material	Max. Pressure		Each
1/4"	Zinc-Plated Steel	4,500 psi @ 72° F	000000000	00000

Plastic Barbed Tube Fittings for Air and Water

Fittings have barbs that grip onto tubing.

Nylon fittings have excellent impact and abrasion resistance.

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

Straight Adapters, Tube × Male Threaded Pipe

Temperature Range: See table
Tubing: Semi-Clear: Use with firm or soft (Durometer 45A-80A) polyurethane rubber or PVC plastic
Opaque: Use with firm or soft (Durometer 40A-80A) polyurethane rubber or PVC plastic

Metric Threads
For Tube ID	Thread Size	Material	Color	Clarity	Max. Pressure	Temp. Range, °F	Pkg. Qty.		Pkg.
5mm	M12 × 1.5 mm	Nylon Plastic	Gray	Opaque	145 psi @ 72° F	-40° to 190°	10	00000000	000000
8mm	M12 × 1.5 mm	Nylon Plastic	Gray	Opaque	145 psi @ 72° F	-40° to 190°	10	00000000	00000
10mm	M12 × 1.5 mm	Nylon Plastic	Gray	Opaque	145 psi @ 72° F	-40° to 190°	10	00000000	00000

Grease Fittings

Thread these fittings into motors, bearings, engine blocks, and other machinery to create a lubrication point. They’re also known as hydraulic grease fittings.

Zinc-plated steel fittings have mild corrosion resistance. 303 stainless steel fittings are more corrosion resistant than brass fittings and have good chemical resistance.

Fittings with a check valve prevent grease from leaking when pressure causes backward flow. The valve stays closed when not in use to keep out dirt and other contaminants.

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

Straight with Male Threads

Straight with
Male
Threads

										Pkg.
Material	Overall Ht.	Thread Lg.	Shank Lg.	Hex Size	Max. Pressure, psi	Check Valve Type	Specifications Met	Pkg. Qty.		1-9	10-Up
M12 × 1 mm Metric Threads
Zinc-Plated Steel	18mm	6.5mm	6.5mm	14mm	10,000	Ball	DIN 71412	10	0000000	000000	000000
M12 × 1.25 mm Metric Threads
Zinc-Plated Steel	17.5mm	6.5mm	6.5mm	14mm	1,450	Ball	DIN 71412	10	00000000	00000	00000
M12 × 1.5 mm Metric Threads
Zinc-Plated Steel	18mm	6.5mm	6.5mm	14mm	10,000	Ball	DIN 71412	5	0000000	00000	00000
303 Stainless Steel	17.5mm	6.5mm	6.5mm	14mm	1,450	Ball	DIN 71412	1	0000000	0000	0000
M12 × 1.75 mm Metric Threads
Zinc-Plated Steel	17.5mm	6.5mm	6.5mm	14mm	1,450	Ball	DIN 71412	5	00000000	0000	0000

90° Elbow with Male Threads

										Pkg.
Material	Overall Ht.	Thread Lg.	Shank Lg.	Hex Size	Max. Pressure, psi	Check Valve Type	Specifications Met	Pkg. Qty.		1-9	10-Up
M12 × 1 mm Metric Threads
Zinc-Plated Steel	22mm	6.5mm	6.5mm	14mm	10,000	Ball	DIN 71412	5	0000000	000000	00000
M12 × 1.5 mm Metric Threads
Zinc-Plated Steel	22mm	6.5mm	6.5mm	14mm	10,000	Ball	DIN 71412	5	0000000	00000	00000
M12 × 1.75 mm Metric Threads
Zinc-Plated Steel	22mm	6.5mm	6.5mm	14mm	1,450	Ball	DIN 71412	5	00000000	00000	00000

45° Elbow with Male Threads

										Pkg.
Material	Overall Ht.	Thread Lg.	Shank Lg.	Hex Size	Max. Pressure, psi	Check Valve Type	Specifications Met	Pkg. Qty.		1-9	10-Up
M12 × 1 mm Metric Threads
Zinc-Plated Steel	22.5mm	6.5mm	6.5mm	14mm	1,450	Ball	DIN 71412	5	00000000	000000	000000
M12 × 1.5 mm Metric Threads
Zinc-Plated Steel	23mm	6.5mm	6.5mm	14mm	10,000	Ball	DIN 71412	5	0000000	00000	0000
M12 × 1.75 mm Metric Threads
Zinc-Plated Steel	22.5mm	6.5mm	6.5mm	14mm	1,450	Ball	DIN 71412	5	00000000	00000	00000

Button-Head Grease Fittings

Often used on earth movers, mining equipment, and other heavy machinery, these fittings have a T-shaped top that holds the dispensing tip in place so it won’t pop off when adding grease. They're best for machinery requiring high volumes of grease because they let more grease pass through than standard grease fittings, thanks to a larger opening. An integral check valve prevents grease from leaking when pressure causes backward flow. The valve stays closed when not in use to keep out dirt and other contaminants.

Zinc-plated steel fittings have mild corrosion resistance. 303 stainless steel fittings are more corrosion resistant than zinc-plated steel fittings and have good chemical resistance.

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

Straight with Male Threads

										Each
Material	Overall Ht.	Thread Lg.	Shank Lg.	Hex Size	Head Dia.	Max. Pressure, psi	Check Valve Type	Specifications Met		1-9	10-Up
M12 × 1 mm Metric Threads
Zinc-Plated Steel	17mm	6mm	6mm	17mm	16mm	1,450	Ball	DIN 3404	0000000	00000	00000
M12 × 1.5 mm Metric Threads
Zinc-Plated Steel	17mm	6mm	6mm	17mm	16mm	10,000	Ball	DIN 3404	0000000	0000	0000
303 Stainless Steel	17mm	6mm	6mm	17mm	16mm	10,000	Ball	DIN 3404	0000000	00000	00000
M12 × 1.75 mm Metric Threads
Zinc-Plated Steel	17mm	6mm	6mm	17mm	16mm	1,450	Ball	DIN 3404	0000000	0000	0000

Flush-Style Grease Fittings

The nipple doesn't stick out, so these fittings fit in tight spaces and won't be damaged if something knocks into them. An integral check valve prevents grease from leaking when pressure causes backward flow. The valve stays closed when not in use to keep out dirt and other contaminants.

Zinc-plated steel fittings have mild corrosion resistance. Install Style C with a hex wrench.

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

											Pkg.
Style	Material	Overall Ht.	Thread Lg.	Shank Lg.	Hex Size	Max. Pressure, psi	Check Valve Type	Specifications Met	Pkg. Qty.		1-9	10-Up
Straight with Male Threads
M12 × 1.5 mm Metric Threads
C	Zinc-Plated Steel	14mm	9.5mm	9.5mm	14mm	1,450	Ball	DIN 3405	5	00000000	000000	00000

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

Adapter

Connection
Male	Female	Material		Each
Adapters
Metric M12 × 1 mm	NPT 1/8	Steel	00000000	000000