VCR Gaskets | McMaster-Carr

	For Tube OD For Tube OD

	Connection Style Connection Style

	Type Type


Adapter	Nut

Cap	Plug

	Material Material

304 Stainless Steel

316 Stainless Steel

316L Stainless Steel

	Gender Gender

Female

Male

	For Tube Material For Tube Material

316/316L Stainless Steel

304/304L Stainless Steel

	Shape Shape

	Straight
	Cap/Plug

	For Use With For Use With

Argon

Helium

Nitrogen

	Connection Type Connection Type


Tube	Pipe

	Maximum Pressure Maximum Pressure

	Length Length

	Pipe Size Pipe Size

1/4

1/2

	Maximum Vacuum Maximum Vacuum

1 × 10^-9 torr @
72° F

10^-11 torr @
72° F

	Gasket Connection Type Gasket Connection Type

Threaded

Unthreaded

	Nut Material Nut Material

316L Stainless Steel

316/316L Stainless Steel

	Minimum Temperature Minimum Temperature

-420° F

0° F

	Maximum Temperature Maximum Temperature

300° F

1000° F

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

REACH Compliant

	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

	Interior Smoothness Interior Smoothness

	Wall Thickness Wall Thickness

0.035"

0.049"

	For Tube Wall Thickness For Tube Wall Thickness

86 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.

For Use With: Argon, Helium, Nitrogen
Temperature Range: -420° to 1000° F
Tubing: Use with 316/316L stainless steel
Compatible With: Swagelok® VCR

The 15 Ra finish on the interior of these fittings creates an ultra-smooth surface. Also known as ultra-high-purity fittings, they are packed in a Class 100 clean room to prevent contamination. 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 high-vacuum applications. Fittings are 316 stainless steel for excellent corrosion resistance.

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

Straight Adapters, Gasket Fitting × Male Threaded Pipe

NPT Threads
For Tube OD	Pipe Size	Material	Max. Pressure	Max. Vacuum		Each
1/4"	1/4	316L Stainless Steel	5,200 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	000000
1/2"	1/2	316L Stainless Steel	3,500 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000

Straight Adapters, Gasket Fitting × Female Threaded Pipe

NPT Threads
For Tube OD	Pipe Size	Material	Max. Pressure	Max. Vacuum		Each
1/4"	1/4	316L Stainless Steel	5,200 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	000000
1/2"	1/2	316L Stainless Steel	3,500 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000

Straight Adapters, Gasket Fitting × Yor-Lok Tube

For Tube
OD	Wall Thick.	Material	Max. Pressure	Max. Vacuum		Each
1/4"	0.035"	316L Stainless Steel	5,100 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	000000
1/2"	0.049"	316L Stainless Steel	3,500 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000

Straight Adapters, Gasket × Butt-Weld

For Tube OD	Wall Thick.	Lg.	Material	Max. Pressure	Max. Vacuum		Each
1/2"	0.049"	1 1/8"	316L Stainless Steel	3,500 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	000000

Caps

For Tube OD	Material	Max. Pressure	Max. Vacuum		Each
1/4"	316L Stainless Steel	5,100 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	000000
1/2"	316L Stainless Steel	3,500 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000

Plugs

For Tube OD	Material	Max. Pressure	Max. Vacuum		Each
1/4"	316L Stainless Steel	5,100 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	000000
1/2"	316L Stainless Steel	3,500 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000

Nuts

Male

Female

Use a female nut to connect a threaded adapter or a Yor-Lok adapter with a butt-weld adapter.

				Male		Female
For Tube OD	Nut Material	Max. Pressure	Max. Vacuum		Each		Each
1/4"	316L Stainless Steel	5,100 psi @ 72° F	10 ^-11 torr @ 72° F	000000	00	0000000	000000
1/2"	316L Stainless Steel	3,500 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	000000	0000000	00000

Gaskets

For Tube OD	Gasket Material	Max. Vacuum		Each
1/4"	316L Stainless Steel	10 ^-11 torr @ 72° F	0000000	00000
1/2"	316L Stainless Steel	10 ^-11 torr @ 72° F	0000000	0000

Nuts for Ultra-High-Polish Gasket Fittings for Stainless Steel Tubing

Male

Female

For Use With: Argon, Helium, Nitrogen
Temperature Range: -420° to 1000° F
Tubing: Use with 316/316L stainless steel
Compatible With: Swagelok® VCR

Nuts are 316 stainless steel for excellent corrosion resistance.

To connect two butt-weld adapters, use a male nut and a female nut. To connect a threaded adapter or a Yor-Lok adapter with a butt-weld adapter, use a female nut. Nuts and adapters are sold separately.

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

				Male		Female
For Tube OD	Nut Material	Max. Pressure	Max. Vacuum		Each		Each
1/4"	316L Stainless Steel	5,100 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000	0000000	000000
1/2"	316L Stainless Steel	3,500 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000	0000000	00000

Ultra-High-Polish Gasket Adapters for Stainless Steel Tubing

For Use With: Argon, Helium, Nitrogen
Temperature Range: -420° to 1000° F
Tubing: Use with 316/316L stainless steel
Compatible With: Swagelok® VCR

The 15 Ra finish on the interior of these adapters provides an ultra-smooth surface. Also known as ultra-high-purity fittings, they are packed in a Class 100 clean room to prevent contamination. They are commonly used in semiconductor applications. Adapters use a metal gasket (sold separately) which generates fewer particles than a rubber gasket and creates a strong seal in high-pressure and high-vacuum applications. Adapters are 316 stainless steel for excellent corrosion resistance.

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

Straight Adapters, Gasket × Butt-Weld Tube

For Tube OD	Wall Thick.	Lg.	Material	Max. Pressure	Max. Vacuum		Each
1/4"	0.035"	19/32"	316L Stainless Steel	5,100 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	000000
1/4"	0.035"	1 3/32"	316L Stainless Steel	5,100 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000

Plugs

For Tube OD	Material	Max. Pressure	Max. Vacuum		Each
1/4"	316L Stainless Steel	5,100 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	000000

Nuts

Male

Female

Use a male nut and a female nut to connect two butt-weld adapters.

				Male		Female
For Tube OD	Nut Material	Max. Pressure	Max. Vacuum		Each		Each
1/4"	316L Stainless Steel	5,100 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000	0000000	000000

Gaskets

For Tube OD	Gasket Material	Max. Vacuum		Each
1/4"	316L Stainless Steel	10 ^-11 torr @ 72° F	0000000	00000

Vibration-Resistant Ultra-High-Polish Gasket Fittings for Stainless Steel Tubing

For Use With: Argon, Helium, Nitrogen
Temperature Range: -420° to 1000° F
Tubing: Use with 316/316L stainless steel

Polished to a 7 Ra finish on the inside, these fittings have an ultra-smooth interior surface. Also known as ultra-high-purity fittings, they are packed in a Class 100 clean room to prevent contamination. They are commonly used in semiconductor applications. Fittings use a metal gasket, which generates fewer particles than a rubber gasket and creates a strong seal in high-pressure and high-vacuum applications. Two anti-torque rings further reduce particle generation by preventing the metal gasket from twisting and loosening. Fittings are 316 stainless steel for excellent corrosion resistance.

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

Gasket Fittings, Gasket × Butt-Weld Tube

Shown Assembled

For Tube OD	Wall Thickness	Lg.	Material	Max. Pressure	Max. Vacuum		Each
1/4"	0.035"	1 13/16"	316/316L Stainless Steel	4,000 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	000000
1/4"	0.035"	2 13/16"	316/316L Stainless Steel	4,000 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000
3/8"	0.035"	2 5/8"	316/316L Stainless Steel	2,700 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000
1/2"	0.049"	2 15/16"	316/316L Stainless Steel	2,800 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	000000

Adapters, Gasket × Butt-Weld Tube

For Tube OD	Wall Thick.	Lg.	Material	Max. Pressure	Max. Vacuum	Compatible With		Each
1/4"	0.035"	1 1/8"	316/316L Stainless Steel	4,000 psi @ 72° F	10 ^-11 torr @ 72° F	Swagelok® VCR	0000000	000000
1/4"	0.035"	1 3/4"	316/316L Stainless Steel	4,000 psi @ 72° F	10 ^-11 torr @ 72° F	Swagelok® VCR	0000000	00000
3/8"	0.035"	5/8"	316/316L Stainless Steel	2,700 psi @ 72° F	10 ^-11 torr @ 72° F	Swagelok® VCR	0000000	00000
3/8"	0.035"	1 5/16"	316/316L Stainless Steel	2,700 psi @ 72° F	10 ^-11 torr @ 72° F	Swagelok® VCR	0000000	00000
1/2"	0.049"	1 1/8"	316/316L Stainless Steel	2,800 psi @ 72° F	10 ^-11 torr @ 72° F	Swagelok® VCR	0000000	00000
1/2"	0.049"	1 13/16"	316/316L Stainless Steel	2,800 psi @ 72° F	10 ^-11 torr @ 72° F	Swagelok® VCR	0000000	00000

Caps

For Tube OD	Material	Max. Pressure	Max. Vacuum		Each
1/4", 3/8"	316/316L Stainless Steel	4,000 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	000000
1/2"	316/316L Stainless Steel	2,800 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000

Plugs

For Tube OD	Material	Max. Pressure	Max. Vacuum		Each
1/4", 3/8"	316/316L Stainless Steel	4,000 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	000000
1/2"	316/316L Stainless Steel	2,800 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000

Nuts

Male

Female

				Male		Female
For Tube OD	Nut Material	Max. Pressure	Max. Vacuum		Each		Each
1/4"	316/316L Stainless Steel	4,000 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000	0000000	00000
3/8"	316/316L Stainless Steel	2,700 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	0000	0000000	0000
1/2"	316/316L Stainless Steel	2,800 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000	0000000	00000

Gaskets

For Tube OD	Gasket Material	Max. Vacuum		Each
1/4", 3/8"	316/316L Stainless Steel	10 ^-11 torr @ 72° F	0000000	00000
1/2"	316/316L Stainless Steel	10 ^-11 torr @ 72° F	0000000	0000

Anti-Torque Rings

For Tube OD	Material	Max. Vacuum		Each
1/4"	316/316L Stainless Steel	10 ^-11 torr @ 72° F	0000000	000000
3/8"	316/316L Stainless Steel	10 ^-11 torr @ 72° F	0000000	00000
1/2"	316/316L Stainless Steel	10 ^-11 torr @ 72° F	0000000	00000

Quick-Clamp High-Vacuum Fittings for Stainless Steel Tubing

For Use With:
Fittings with Gasket End: Air, Argon, Helium, Nitrogen
All Other Fittings: Air
Temperature Range: 0° to 300° F
Tubing: Use with 304/304L or 316/316L stainless steel
Specifications Met: ISO 2861

Instead of a gasket, these fittings have a special ring that is designed for high-vacuum applications, such as vacuum coating and heat treating, leak testing, and analyzing gases. Also known as KF, QF, and NW fittings, they are the most common type of connection in high-vacuum systems. Connect with a clamp and another quick-clamp fitting for fast, easy access to your line. To use fittings in pressure applications, use a pressure-rated ring (sold separately).

304 stainless steel fittings have very good corrosion resistance.

Note: To complete a connection, you’ll need two quick-clamp fittings, a ring, and a clamp (all sold separately).

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

Straight Adapters, Tube × Male Gasket Tube

Fittings with gasket end connect with a stainless steel gasket (sold separately) instead of a rubber one, generating fewer particles to create a stronger high-vacuum seal. Their interior is ultra-smooth to attract fewer contaminants. These adapters are commonly used to add gases such as helium, argon, or nitrogen into high-vacuum systems. Also known as VCR fittings.

Quick-Clamp Tube Connection
For Tube OD	Flange OD	High-Vacuum Flange Size	High Vacuum Connection Type	For Tube OD (Gasket)	Max. Vacuum	Max. Pressure	Compatible With		Each
3/4"	1.18"	16	ISO-KF	1/4"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Swagelok® VCR	00000000	000000
3/4"	1.18"	16	ISO-KF	1/2"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Swagelok® VCR	00000000	000000
1"	1.57"	25	ISO-KF	1/4"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Swagelok® VCR	00000000	00000
1"	1.57"	25	ISO-KF	1/2"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Swagelok® VCR	00000000	000000
1 1/2"	2.16"	40	ISO-KF	1/4"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Swagelok® VCR	00000000	00000
1 1/2"	2.16"	40	ISO-KF	1/2"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Swagelok® VCR	00000000	000000

Gasket for 1/2" Tube OD (Gasket End)	0000000	Each	00000
Gasket for 1/4" Tube OD (Gasket End)	0000000	Each	0000

Straight Adapters, Tube × Female Gasket Tube

Quick-Clamp Tube Connection
For Tube OD	Flange OD	High-Vacuum Flange Size	High Vacuum Connection Type	For Tube OD (Gasket)	Max. Vacuum	Max. Pressure	Compatible With		Each
3/4"	1.18"	16	ISO-KF	1/4"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Swagelok® VCR	00000000	000000
3/4"	1.18"	16	ISO-KF	1/2"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Swagelok® VCR	00000000	000000
1"	1.57"	25	ISO-KF	1/4"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Swagelok® VCR	00000000	00000
1"	1.57"	25	ISO-KF	1/2"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Swagelok® VCR	00000000	000000
1 1/2"	2.16"	40	ISO-KF	1/4"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Swagelok® VCR	00000000	00000
1 1/2"	2.16"	40	ISO-KF	1/2"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Swagelok® VCR	00000000	000000

Gasket for 1/2" Tube OD (Gasket End)	0000000	Each	00000
Gasket for 1/4" Tube OD (Gasket End)	0000000	Each	0000

Clamps

Clamp with Wing Nut

Spring-Loaded Clamp

Clamps tighten by hand. Spring-loaded clamps are also known as toggle clamps.

with Wing Nut
For Tube OD	For Flange OD	For High-Vacuum Flange Size	High Vacuum Connection Type	Material	Max. Vacuum	Lanyard Length		Each
1/2", 3/4"	1.18"	10, 16	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	__	00000000	00000
1"	1.57"	25	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	__	0000000	00000
1 1/2"	2.16"	40	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	__	0000000	00000
Spring Loaded
1/2", 3/4"	1.18"	10, 16	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	__	0000000	00000
1"	1.57"	25	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	__	0000000	00000
1 1/2"	2.16"	40	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	__	0000000	00000
Spring Loaded with Lanyard
3/4"	1.18"	16	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	5 3/4"	00000000	00000
1"	1.57"	25	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	5 3/4"	00000000	00000
1 1/2"	2.16"	40	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	5 3/4"	00000000	00000

Rings

Ring

Ring with Stainless Steel Screen

Ring with Aluminum Outer Ring

Use these rings with quick-clamp high-vacuum fittings. They consist of a stainless steel inner ring covered by a fluoroelastomer O-ring.

Rings
For Tube OD	For Flange OD	For High-Vacuum Flange Size	High Vacuum Connection Type	Inner Ring Material	Max. Vacuum	Max. Pressure		Each
3/4"	1.18"	16	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	00000000	00000
1"	1.57"	25	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	0000000	00000
1 1/2"	2.16"	40	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	0000000	00000
Rings with Stainless Steel Screen
3/4"	1.18"	16	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	00000000	00000
1"	1.57"	25	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	00000000	00000
1 1/2"	2.16"	40	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	00000000	00000
Rings with Aluminum Outer Ring
3/4"	1.18"	16	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	00000000	00000
1"	1.57"	25	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	100 psi @ 72° F	0000000	00000
1 1/2"	2.16"	40	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	75 psi @ 72° F	0000000	00000

Hose

Rigid Hose

Flexible Hose

Hose absorbs moderate vibration

3 3/16" Lg.
For Tube OD	Flange OD	High-Vacuum Flange Size	High Vacuum Connection Type	Material	Max. Vacuum	Bend Radius	Flexibility		Each
3/4"	1.18"	16	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	__	Rigid	0000000	000000
4 3/16" Lg.
1"	1.57"	25	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	__	Rigid	0000000	00000
1 1/2"	2.16"	40	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	__	Rigid	0000000	000000
12" Lg.
3/4"	1.18"	16	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	1 5/8"	Flexible	00000000	000000
1"	1.57"	25	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	1 3/8"	Flexible	00000000	000000
1 1/2"	2.16"	40	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	2 1/2"	Flexible	00000000	000000
24" Lg.
3/4"	1.18"	16	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	1 5/8"	Flexible	00000000	000000
1"	1.57"	25	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	1 3/8"	Flexible	00000000	000000
1 1/2"	2.16"	40	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	2 1/2"	Flexible	00000000	000000
39" Lg.
3/4"	1.18"	16	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	1 5/8"	Flexible	00000000	000000
1"	1.57"	25	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	1 3/8"	Flexible	00000000	000000
1 1/2"	2.16"	40	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	2 1/2"	Flexible	00000000	000000