Vacuum Tube Rings | McMaster-Carr

	Connection Style Connection Style

Quick Clamp

Claw Clamp

Flanged

Compression

	Trade Number Trade Number

100

160

	For Tube OD For Tube OD

	Type Type


Clamp	Sleeve

	For Tube Material For Tube Material

Stainless Steel

Copper

	High Vacuum Connection Type High Vacuum Connection Type

ISO-KF

ISO-F

ISO-K

	For Use With For Use With

	For Flange OD For Flange OD

	Clamp Type Clamp Type

Spring

Wing Nut

	Maximum Vacuum Maximum Vacuum

1 × 10^-9 torr @
72° F

1 × 10^-7 torr @
72° F

29 in. of Hg @ 72° F

	Length Length

	Maximum Temperature Maximum Temperature

	Minimum Temperature Minimum Temperature

	Maximum Pressure Maximum Pressure

	Vacuum Rating Vacuum Rating

High

Standard

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

DFARS Specialty Metals
COTS-Exempt

	O-Ring Material O-Ring Material

Fluoroelastomer Rubber

Viton® Fluoroelastomer
Rubber

	Sterilize With Sterilize With

Steam (Autoclaving)

Not Recommended

	Sleeve Material Sleeve Material

Buna-N Rubber

Fluoroelastomer Rubber

	Dash Size Dash Size

	Sleeve Color Sleeve Color

	Black with Green Stripe
	Black with Red Stripe

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38 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.

Ring

Ring with Stainless Steel Screen

Ring with Aluminum Outer Ring

For Use With: Air
Temperature Range: 0° to 300° F
Tubing: Use with 304/304L or 316/316L stainless steel
Specifications Met: ISO 2861

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

Rings with screen have a stainless steel screen to filter out large particles.

Pressure-rated rings have an aluminum outer ring to withstand extra pressure.

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

Rings
For Tube OD	For Flange OD	Trade Number	High Vacuum Connection Type	Inner Ring Material	Max. Vacuum	Max. Pressure		Each
1/2"	1.18"	10	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	00000000	00000
3/4"	1.18"	16	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	00000000	0000
1"	1.57"	25	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	0000000	0000
1 1/2"	2.16"	40	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	0000000	00000
2"	2.95"	50	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
2"	2.95"	50	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	00000000	00000
Rings with Aluminum Outer Ring
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
2"	2.95"	50	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	50 psi @ 72° F	0000000	00000

Clamps for Quick-Clamp High-Vacuum Fittings for Stainless Steel Tubing

For Use With: Air
Temperature Range: 0° to 300° F
Tubing: Use with 304/304L or 316/316L stainless steel
Specifications Met: ISO 2861

Connect quick-clamp fittings in high-vacuum applications. Clamps tighten by hand. They are aluminum, which is lightweight with good corrosion resistance.

Spring-loaded clamps are also known as toggle clamps.

Clamps with lanyard let you secure clamp to equipment.

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

Clamps

Clamp with Wing Nut

Spring-Loaded Clamp

with Wing Nut
For Tube OD	For Flange OD	Trade Number	High Vacuum Connection Type	Material	Max. Vacuum	Lanyard Lg.		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
2"	2.95"	50	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
2"	2.95"	50	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
2"	2.95"	50	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 with screen have a stainless steel screen to filter out large particles.

Pressure-rated rings have an aluminum outer ring to withstand extra pressure.

Rings
For Tube OD	For Flange OD	Trade Number	High Vacuum Connection Type	Inner Ring Material	Max. Vacuum	Max. Pressure		Each
1/2"	1.18"	10	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	00000000	00000
3/4"	1.18"	16	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	00000000	0000
1"	1.57"	25	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	0000000	0000
1 1/2"	2.16"	40	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	0000000	00000
2"	2.95"	50	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
2"	2.95"	50	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	00000000	00000
Rings with Aluminum Outer Ring
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
2"	2.95"	50	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	50 psi @ 72° F	0000000	00000

Rings for Claw-Clamp and Bolt-Together
High-Vacuum Fittings for Stainless Steel Tubing

Ring

For Use With: Air
Max. Temperature: 400° F
Tubing: Use with 304/304L Stainless Steel or 316/316L Stainless Steel

Create airtight seals in high-vacuum systems by placing these rings between two claw-clamp (ISO-K) or bolt-together (ISO-F) fittings. They contain a Viton® fluoroelastomer O-ring—when you clamp or bolt your fittings together, the O-ring compresses to establish the seal.

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

Claw-Clamp Connection				Flanged Connection				Material
For Tube OD	For Flange OD	Trade Number	High Vacuum Connection Type	For Tube OD	For Flange OD	Trade Number	High Vacuum Connection Type	O-Ring	Inner Ring	Max. Vacuum		Each
2 1/2"	3.74"	63	ISO-K	2 1/2"	5.12"	63	ISO-F	Viton® Fluoroelastomer Rubber	304 Stainless Steel	1 × 10 ^-9 torr @ 72° F	0000000	000000
3"	4.33"	80	ISO-K	3"	5.71"	80	ISO-F	Viton® Fluoroelastomer Rubber	304 Stainless Steel	1 × 10 ^-9 torr @ 72° F	000000	00000
4"	5.12"	100	ISO-K	4"	6.5"	100	ISO-F	Viton® Fluoroelastomer Rubber	304 Stainless Steel	1 × 10 ^-9 torr @ 72° F	0000000	00000
6"	7.09"	160	ISO-K	6"	8.86"	160	ISO-F	Viton® Fluoroelastomer Rubber	304 Stainless Steel	1 × 10 ^-9 torr @ 72° F	0000000	00000

Sleeves for Vibration-Resistant Compression Fittings for Copper Tubing

For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Lubricants, Mineral Oil, Water
Temperature Range: -30° to 270° F, except fluoroelastomer rubber sleeves are -15° to 450° F
Tubing: Use with copper

Use these sleeves with vibration-resistant compression nuts and fittings. They are rubber instead of metal, so they cushion the tubing and absorb vibration while creating a tight seal. They are also known as ferrules.

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

Buna-N Rubber
For Tube OD	Sleeve Color	Max. Pressure		Each
3/16"	Black with Green Stripe	300 psi @ 72° F	00000000	00000
1/4"	Black with Green Stripe	300 psi @ 72° F	00000000	0000
5/16"	Black with Green Stripe	220 psi @ 72° F	00000000	0000
3/8"	Black with Green Stripe	170 psi @ 72° F	00000000	0000
1/2"	Black with Green Stripe	100 psi @ 72° F	00000000	0000
Fluoroelastomer Rubber
3/16"	Black with Red Stripe	300 psi @ 72° F	00000000	00000
1/4"	Black with Red Stripe	300 psi @ 72° F	00000000	0000
5/16"	Black with Red Stripe	220 psi @ 72° F	00000000	0000
3/8"	Black with Red Stripe	170 psi @ 72° F	00000000	0000
1/2"	Black with Red Stripe	100 psi @ 72° F	00000000	00000

How to Identify and Measure Fittings

Rings for Quick-Clamp High-Vacuum Fittings for Stainless Steel Tubing

Clamps for Quick-Clamp High-Vacuum Fittings for Stainless Steel Tubing

Rings for Claw-Clamp and Bolt-TogetherHigh-Vacuum Fittings for Stainless Steel Tubing

Sleeves for Vibration-Resistant Compression Fittings for Copper Tubing

Rings for Claw-Clamp and Bolt-Together
High-Vacuum Fittings for Stainless Steel Tubing