Tees for Nitrogen | McMaster-Carr

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316-316L Stainless Steel

Polypropylene

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92 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.

Precision Extreme-Pressure Stainless Steel Threaded Pipe Fittings

Made to tighter tolerances than other stainless steel pipe fittings, these are also known as instrumentation fittings. The male threads are rolled for extra strength in extreme-pressure applications. Fittings are commonly used to connect equipment in gas and hydraulic fluid lines. They are 316 stainless steel for excellent corrosion resistance. Inline tees are also known as branch tees. Right-angle tees are also known as run tees.

Tee Connectors, Female

For Use With: Hydraulic Fluid, Liquid Nitrogen, Natural Gas, Steam, Water
Specifications Met: ASME B1.20.1, ASME B31.1, ASME B31.3

				316 Stainless Steel
Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure		Each
NPT Female
1/16	__	7,000 psi @ 72° F	7,000 psi @ 300° F	000000000	000000
1/8	02	5,500 psi @ 72° F	5,500 psi @ 300° F	00000000	00000
1/4	04	5,600 psi @ 72° F	5,600 psi @ 300° F	000000000	00000
3/8	06	5,000 psi @ 72° F	5,000 psi @ 300° F	00000000	00000
1/2	08	4,500 psi @ 72° F	4,500 psi @ 300° F	000000000	000000
3/4	12	4,600 psi @ 72° F	4,600 psi @ 300° F	000000000	00000
1	16	5,300 psi @ 72° F	5,300 psi @ 300° F	00000000	000000

Tee Connectors, Male

For Use With: Hydraulic Fluid, Liquid Nitrogen, Natural Gas, Steam, Water
Specifications Met: ASME B1.20.1, ASME B31.1, ASME B31.3

				316 Stainless Steel
Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure		Each
NPT Male
1/8	02	9,700 psi @ 72° F	9,700 psi @ 300° F	000000000	000000
1/4	04	8,000 psi @ 72° F	8,000 psi @ 300° F	000000000	00000
3/8	06	7,600 psi @ 72° F	7,600 psi @ 300° F	000000000	00000
1/2	08	6,200 psi @ 72° F	6,200 psi @ 300° F	000000000	00000
3/4	12	6,400 psi @ 72° F	6,400 psi @ 300° F	000000000	000000
1	16	4,600 psi @ 72° F	4,600 psi @ 300° F	000000000	000000

Inline Tee Adapters

For Use With: Hydraulic Fluid, Liquid Nitrogen, Natural Gas, Steam, Water
Specifications Met: ASME B1.20.1, ASME B31.1, ASME B31.3

				316 Stainless Steel
Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure		Each
NPT Female × NPT Male
1/8	02	5,500 psi @ 72° F	5,500 psi @ 300° F	000000000	000000
1/4	04	5,600 psi @ 72° F	5,600 psi @ 300° F	000000000	00000
3/8	06	5,000 psi @ 72° F	5,000 psi @ 300° F	000000000	00000
1/2	08	4,500 psi @ 72° F	4,500 psi @ 300° F	000000000	000000
3/4	12	3,500 psi @ 72° F	3,500 psi @ 300° F	000000000	000000
1	16	3,900 psi @ 72° F	3,900 psi @ 300° F	000000000	000000

Right-Angle Tee Adapters

For Use With: Hydraulic Fluid, Liquid Nitrogen, Natural Gas, Steam, Water
Specifications Met: ASME B1.20.1, ASME B31.1, ASME B31.3

				316 Stainless Steel
Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure		Each
NPT Female × NPT Male
1/16	__	7,000 psi @ 72° F	7,000 psi @ 300° F	000000000	000000
1/8	02	5,500 psi @ 72° F	5,500 psi @ 300° F	00000000	00000
1/4	04	5,600 psi @ 72° F	5,600 psi @ 300° F	000000000	00000
3/8	06	5,000 psi @ 72° F	5,000 psi @ 300° F	00000000	00000
1/2	08	4,500 psi @ 72° F	4,500 psi @ 300° F	000000000	000000
3/4	12	3,500 psi @ 72° F	3,500 psi @ 300° F	000000000	000000
1	16	3,900 psi @ 72° F	3,900 psi @ 300° F	000000000	000000

Precision Extreme-Pressure Brass Threaded Pipe Fittings

Also known as instrumentation fittings, these have the most precise threads and the tightest tolerances of all the brass pipe fittings we offer. Fittings are brass for good corrosion resistance.

Inline tees are also known as branch tees. Right-angle tees are also known as run tees.

Tee Connectors, Female

For Use With: Air, Argon, Natural Gas, Nitrogen Gas, Oil, Oxygen, Steam, Water
Specifications Met: ASME B1.20.1, ASME B31.1, ASME B31.3

NPT Female
Pipe Size	Max. Pressure	Max. Steam Pressure		Each
1/8	2,900 psi @ 72° F	1,500 psi @ 300° F	0000000	000000
1/4	3,000 psi @ 72° F	1,500 psi @ 300° F	0000000	00000
3/8	2,700 psi @ 72° F	1,500 psi @ 300° F	0000000	00000
1/2	2,500 psi @ 72° F	1,500 psi @ 300° F	0000000	00000
3/4	2,000 psi @ 72° F	1,500 psi @ 300° F	0000000	000000

Tee Connectors, Male

For Use With: Air, Argon, Natural Gas, Nitrogen Gas, Oil, Oxygen, Steam, Water
Specifications Met: ASME B1.20.1, ASME B31.1, ASME B31.3

NPT Male
Pipe Size	Max. Pressure	Max. Steam Pressure		Each
1/8	5,000 psi @ 72° F	1,500 psi @ 300° F	00000000	000000
1/4	4,100 psi @ 72° F	1,500 psi @ 300° F	00000000	00000
3/8	4,000 psi @ 72° F	1,500 psi @ 300° F	00000000	00000
1/2	3,100 psi @ 72° F	1,500 psi @ 300° F	00000000	00000
3/4	3,400 psi @ 72° F	1,500 psi @ 300° F	00000000	000000

Inline Tee Adapters

For Use With: Air, Argon, Natural Gas, Nitrogen Gas, Oil, Oxygen, Steam, Water
Specifications Met: ASME B1.20.1, ASME B31.1, ASME B31.3

NPT Female × NPT Male
Pipe Size	Max. Pressure	Max. Steam Pressure		Each
1/8	2,900 psi @ 72° F	1,500 psi @ 300° F	0000000	000000
1/4	3,000 psi @ 72° F	1,500 psi @ 300° F	0000000	00000
1/2	2,500 psi @ 72° F	1,500 psi @ 300° F	0000000	00000

Right-Angle Tee Adapters

For Use With: Air, Argon, Natural Gas, Nitrogen Gas, Oil, Oxygen, Steam, Water
Specifications Met: ASME B1.20.1, ASME B31.1, ASME B31.3

NPT Female × NPT Male
Pipe Size	Max. Pressure	Max. Steam Pressure		Each
1/8	2,900 psi @ 72° F	1,500 psi @ 300° F	0000000	000000
1/4	3,000 psi @ 72° F	1,500 psi @ 300° F	0000000	00000
3/8	2,700 psi @ 72° F	1,500 psi @ 300° F	0000000	00000
1/2	2,500 psi @ 72° F	1,500 psi @ 300° F	0000000	00000
3/4	2,000 psi @ 72° F	1,500 psi @ 300° F	0000000	000000

Aluminum Quick-Connect Pipe Fittings for Compressed Air

Twist these fittings onto aluminum pipe for quick, sealed connections—no threading, soldering, or welding necessary. Use them to build a compressed air system in half the time it would take to build a copper or steel system. Also known as Unipipe fittings, they’re part of a quick-connect system that’s compatible with pipe from Unipipe, Transair, and Infinity.

Finger tighten the collar on the end of these fittings, then use a wrench for the final quarter turn. The inside of these fittings has a compression ring and O-ring to seal against the pipe. They’re easy to take apart as needed to modify your setup.

Choose fittings with a blue or gray collar for easy identification. Fittings with a blue collar are often used for compressed air systems. Fittings with a gray collar are often used for vacuum systems.

Tee Connectors, Female Quick Connect

For Use With: Air, Coolant, Nitrogen, Oil
Temperature Range: 0° to 210° F
Specifications Met: ASME B31.1, ASME B31.3, ASME B31.9
Pipe Nipples and Pipe: Use Quick-Disconnect Aluminum

Blue Collar
For Pipe OD	Socket Dp., mm	Material	Color	Max. Pressure		Each
3/4" (20 mm)	35	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	000000
1" (25 mm)	37	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
1 1/2" (40 mm)	57	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
Gray Collar
3/4" (20 mm)	35	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
1" (25 mm)	37	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
1 1/2" (40 mm)	57	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000

Inline Tee Reducing Adapters, Female Quick Connect × Female Threaded

For Use With: Air, Coolant, Nitrogen, Oil
Temperature Range: 0° to 210° F
Specifications Met: ASME B31.1, ASME B31.3, ASME B31.9
Pipe Nipples and Pipe: Use Quick-Disconnect Aluminum

Threaded connections can be taken apart as needed for maintenance and repair.

(A)
For Pipe OD	Socket Dp., mm	Pipe Size (B)	Material	Color	Max. Pressure		Each
Blue Collar
NPT Threads
3/4" (20 mm)	35	1/2	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	000000
1" (25 mm)	37	3/4	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
1 1/2" (40 mm)	57	1 1/4	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
Gray Collar
NPT Threads
3/4" (20 mm)	35	1/2	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
1" (25 mm)	37	3/4	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
1 1/2" (40 mm)	57	1 1/4	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000

Saddle Tap Tees, Female Quick Connect × Clamp On

Tee

Hole Saw

For Use With: Air, Coolant, Nitrogen, Oil
Temperature Range: 0° to 210° F
Specifications Met: ASME B31.1, ASME B31.3, ASME B31.9
Pipe Nipples and Pipe: Use Quick-Disconnect Aluminum

Saddle tap tees bolt onto pipe to add connections without requiring you to disassemble your system. You can use them to connect your ceiling-mounted pipe to equipment below. To install, drill through the threaded outlet into your pipe with a hole saw (sold separately).

Tees
For Pipe OD								Hole Saws
(A)	(B)	Lg., mm	Material	Max. Pressure	Includes		Each		Each
3/4" (20 mm)	1" (25 mm)	33	Epoxy-Coated 6061 Aluminum	580 psi @ 72° F	Cap	0000000	000000	0000000	000000
3/4" (20 mm)	1 1/2" (40 mm)	38	Epoxy-Coated 6061 Aluminum	580 psi @ 72° F	Cap	0000000	00000	0000000	00000
1" (25 mm)	1 1/2" (40 mm)	38	Epoxy-Coated 6061 Aluminum	580 psi @ 72° F	Cap	0000000	00000	0000000	00000

Saddle Tap Tees, Female Threaded × Clamp On

Tee

Tee with Cap

Hole Saw

For Use With: Air, Coolant, Nitrogen, Oil
Temperature Range: 0° to 210° F
Specifications Met: ASME B31.1, ASME B31.3, ASME B31.9
Pipe Nipples and Pipe: Use Quick-Disconnect Aluminum

Threaded connections can be taken apart as needed for maintenance and repair.

Tees								Hole Saws
Pipe Size (A)	For Pipe OD (B)	Lg., mm	Material	Max. Pressure	Includes		Each		Each
NPT Threads
1/2	1" (25 mm)	33	Epoxy-Coated 6061 Aluminum	580 psi @ 72° F	__	0000000	000000	0000000	000000
1/2	1" (25 mm)	33	Epoxy-Coated 6061 Aluminum	580 psi @ 72° F	Cap	0000000	00000	0000000	00000
1/2	1 1/2" (40 mm)	33	Epoxy-Coated 6061 Aluminum	580 psi @ 72° F	Cap	0000000	00000	0000000	00000
1/2	1 1/2" (40 mm)	47	Epoxy-Coated 6061 Aluminum	580 psi @ 72° F	__	0000000	00000	0000000	00000
3/4	1 1/2" (40 mm)	38	Epoxy-Coated 6061 Aluminum	580 psi @ 72° F	Cap	0000000	00000	0000000	00000
3/4	1 1/2" (40 mm)	47	Epoxy-Coated 6061 Aluminum	580 psi @ 72° F	__	0000000	00000	0000000	00000

Wrenches

For Pipe OD	Drive Size, mm	Overall Lg., mm	Head Thick., mm	Material		Each
3/4" (20 mm)	20	172	5	Galvanized Steel	0000000	000000
1" (25 mm)	25	192	5	Galvanized Steel	0000000	00000
1 1/2" (40 mm)	40	245	5	Galvanized Steel	0000000	00000

Measuring Tools

Use measuring tools to mark your pipe’s proper insertion depth so you know if it’s inserted far enough into the fitting.

Max. Dp. Measured, mm	Lg., mm	Wd., mm	Material		Each
160	224	39	Plastic	0000000	000000

Push-to-Connect Fittings for Plastic Tubing—High-Purity

For Use With: Air, Nitrogen, Water
Temperature Range: 32° to 100° F
Tubing: Use with polypropylene plastic

Also known as instant fittings, these connect to tubing with a push, and an internal gripping ring and O-ring hold the tubing tight. To disconnect, push on the release ring and pull the tubing out of the fitting. Fittings are produced in a clean room and are double bagged to prevent dirt and moisture from contaminating the inside. They are polypropylene, which has excellent impact and abrasion resistance.

Inline Tee Adapters, Tube × Male Threaded Pipe

Inline tees are also known as branch tees.

BSPT Threads
For Tube OD	Pipe Size	Material	Color	Release Ring Color	Max. Pressure		Each
1/4"	1/8	Polypropylene Plastic	White	White	100 psi @ 72° F	0000000	000000
1/4"	1/4	Polypropylene Plastic	White	White	100 psi @ 72° F	0000000	00000
3/8"	1/4	Polypropylene Plastic	White	White	100 psi @ 72° F	0000000	00000
3/8"	3/8	Polypropylene Plastic	White	White	100 psi @ 72° F	0000000	00000

Tee Connectors, Tube

For Tube OD	Material	Color	Release Ring Color	Max. Pressure	Mount Type	Mount. Fasteners Included		Each
1/8"	Polypropylene Plastic	White	White	100 psi @ 72° F	Screw On	No	00000000	000000
1/4"	Polypropylene Plastic	White	White	100 psi @ 72° F	Screw On	No	00000000	00000
3/8"	Polypropylene Plastic	White	White	100 psi @ 72° F	Screw On	No	00000000	00000
1/2"	Polypropylene Plastic	White	White	100 psi @ 72° F	Screw On	No	00000000	00000
4mm	Polypropylene Plastic	White	Green	140 psi @ 72° F	Screw On	No	0000000	00000
6mm	Polypropylene Plastic	White	Green	140 psi @ 72° F	Screw On	No	0000000	00000
8mm	Polypropylene Plastic	White	Green	140 psi @ 72° F	Screw On	No	0000000	00000
10mm	Polypropylene Plastic	White	Green	140 psi @ 72° F	Screw On	No	00000000	00000
12mm	Polypropylene Plastic	White	Green	140 psi @ 72° F	Screw On	No	00000000	00000

Ultra-High-Polish Gasket Fittings for Stainless Steel Tubing

For Use With: Ammonia, Argon, Butane, Carbon Dioxide, Chloride, Fluoride, Fluorocarbon, Germane, Halide, Helium, Hydrogen, Krypton, Laser Gas, Natural Gas, Neon, Nitrogen, Oxygen, Silane, Sulfur Hexafluoride, Tungsten Hexafluoride, Xenon
Temperature Range: -420° to 1000° F
Tubing: Use with 316/316L stainless steel
Compatible With: Swagelok® VCR

Polished to at least a 15 Ra finish on the inside, these fittings have an ultra-smooth interior surface that helps prevent contamination. Also known as ultra-high-purity fittings, they’re packed in a Class 100 clean room, cleaned, and double bagged. They are commonly used in semiconductor applications. Fittings use a metal gasket (sold separately), which generates fewer particles than a rubber gasket and creates a strong seal in high-pressure and ultra-high-vacuum applications. Fittings are 316 stainless steel for excellent corrosion resistance.

To assemble, place a gasket between the gasket ends before gently rotating the female-threaded fitting onto the male-threaded fitting. Tighten until 1/8 of a turn past finger tight.

Tee Connectors, Male Threaded Gasket Fitting

For Tube OD	Material	Max. Pressure	Max. Vacuum	Interior Smoothness, Ra	Environmental Rating		Each
1/4"	316L Stainless Steel	5,100 psi @ 72° F	10 ^-11 torr @ 72° F	5	Fed. Std. Class 100	00000000	000000

Nuts

Male

Female

Male
For Tube OD	Nut Material	Max. Pressure	Max. Vacuum	Lg.		Each
1/4"	316L Stainless Steel	5,100 psi @ 72° F	10 ^-11 torr @ 72° F	17/32"	00000000	00000
1/4"	316L Stainless Steel	5,100 psi @ 72° F	10 ^-11 torr @ 72° F	23/32"	0000000	0000
Female
1/4"	316L Stainless Steel	5,100 psi @ 72° F	10 ^-11 torr @ 72° F	13/16"	0000000	0000

Gaskets

Gasket

Gasket with
Retaining
Tabs

Nickel gaskets are softer than stainless steel gaskets, so they won’t wear down sealing surfaces as much, and they’re easier to tighten. They’re reactive to carbon monoxide and ozone, so they shouldn’t be used with those chemicals.

Hard and heat resistant, stainless steel gaskets can be used in a wider range of applications than nickel gaskets such as carbon monoxide and ozone. However, they’re harder to tighten than nickel gaskets, and they’ll wear down sealing surfaces more quickly.

Silver-plated stainless steel gaskets are softer than unfinished stainless steel gaskets, so they won’t wear down sealing surfaces as much, and they’re easier to tighten. However, they oxidize when exposed to air, and silver particles might flake off during assembly.

Gaskets with retaining tabs stay in place during installation, so you don’t have to hold the gasket while fastening fittings together. This also means they’re less likely to scratch or nick your fittings by rotating during installation.

Nickel Gasket
For Tube OD	Max. Vacuum	Environmental Rating		Each
1/4"	10 ^-11 torr @ 72° F	Fed. Std. Class 100	00000000	00000
316L Stainless Steel Gasket
1/4"	10 ^-11 torr @ 72° F	Fed. Std. Class 100	0000000	0000
Silver-Plated 316L Stainless Steel Gasket
1/4"	10 ^-11 torr @ 72° F	Fed. Std. Class 100	00000000	0000
316L Stainless Steel Gasket with Retaining Tabs
1/4"	10 ^-11 torr @ 72° F	Fed. Std. Class 100	00000000	0000