Vacuum Tube Clamps | McMaster-Carr

	Type Type


Clamp	Connector

Repair Clamp

	For Tube OD For Tube OD

	Connection Style Connection Style

Quick Clamp

Clamp On

Claw Clamp

	Material Material

Aluminum

Steel

Stainless Steel

	For High-Vacuum Flange Size For High-Vacuum Flange Size

100

160

	Clamp Type Clamp Type

	For Use With For Use With

	For Tube Material For Tube Material

Stainless Steel

Steel

Copper

	Connection Type Connection Type

	Tube
	Pipe

	Maximum Vacuum Maximum Vacuum

1 × 10^-9 torr @
72° F

1 × 10^-7 torr @
72° F

15 in. of Hg @ 72° F

	For Flange OD For Flange OD

	Number of Bolts Number of Bolts

	Gasket Material Gasket Material

	Length Length

	Minimum Temperature Minimum Temperature

	Maximum Temperature Maximum Temperature

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

DFARS Specialty Metals
COTS-Exempt

	Vacuum Rating Vacuum Rating

High

Standard

	Maximum Pressure Maximum Pressure

15 psi @ 72° F

150 psi @ 72° F

Not Rated

	For Pipe Size For Pipe Size

1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
3 1/2
4
5
6
8
10

	High Vacuum Connection Type High Vacuum Connection Type

ISO-KF

ISO-K

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

RoHS Compliant

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

REACH Compliant

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110 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: 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	For High-Vacuum Flange Size	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.

Rings
For Tube OD	For Flange OD	For High-Vacuum Flange Size	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
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
2"	2.95"	50	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	50 psi @ 72° F	0000000	00000

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

Connect claw-clamp high-vacuum fittings for an airtight seal. For a complete connection, you'll need four clamps and a ring (sold separately).

Double-claw clamps attach to the grooves on the fittings.

Single-claw clamps have a clamp on one end and an exposed bolt on the other. Thread the bolt-end directly into the body of pumps, valves, or other high-vacuum components.

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

Clamps

Double-Claw Clamp

Single-Claw Clamp

Double Claw
For Tube OD	For Flange OD	For High-Vacuum Flange Size	High Vacuum Connection Type	Material	Bolt Material	Max. Vacuum		Each
2 1/2", 3", 4"	3.74", 4.33", 5.12"	63, 80, 100	ISO-K	Aluminum	18-8 Stainless Steel	1 × 10 ^-9 torr @ 72° F	0000000	00000
6"	7.09"	160	ISO-K	Aluminum	18-8 Stainless Steel	1 × 10 ^-9 torr @ 72° F	0000000	0000
Single Claw
2 1/2", 3", 4"	3.74", 4.33", 5.12"	63, 80, 100	ISO-K	Aluminum	18-8 Stainless Steel	1 × 10 ^-9 torr @ 72° F	0000000	0000
6"	7.09"	160	ISO-K	Aluminum	18-8 Stainless Steel	1 × 10 ^-9 torr @ 72° F	0000000	0000

Rings

Ring

				Material
For Tube OD	For Flange OD	For High-Vacuum Flange Size	High Vacuum Connection Type	O-Ring	Inner Ring	Max. Vacuum	Max. Temp., °F		Each
2 1/2"	3.74"	63	ISO-K	Viton® Fluoroelastomer Rubber	304 Stainless Steel	1 × 10 ^-9 torr @ 72° F	400°	0000000	000000
3"	4.33"	80	ISO-K	Viton® Fluoroelastomer Rubber	304 Stainless Steel	1 × 10 ^-9 torr @ 72° F	400°	000000	00000
4"	5.12"	100	ISO-K	Viton® Fluoroelastomer Rubber	304 Stainless Steel	1 × 10 ^-9 torr @ 72° F	400°	0000000	00000
6"	7.09"	160	ISO-K	Viton® Fluoroelastomer Rubber	304 Stainless Steel	1 × 10 ^-9 torr @ 72° F	400°	0000000	00000

Clamps for Vacuum Fittings for Steel Tubing

Use these clamps to connect vacuum tube fittings. Insert two fittings into a clamp and tighten to form a secure seal.

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

Bolt Clamps

For Use With: Air, Glass, Plastic Pellets, Resins, Wood Chips
Temperature Range: Neoprene Rubber Gaskets: -50° to 180° F
Silicone Rubber Gaskets: -100° to 500° F
Tubing: Use with steel

Bolt clamps have a stainless steel strip that provides an escape route for electrostatic buildup when used in a fully-grounded system. They have fair corrosion resistance.

				Neoprene Rubber Gaskets		Silicone Rubber Gaskets
For Tube OD	Material	Max. Pressure	Max. Vacuum		Each		Each
1 1/2"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	000000	0000000	000000
1 3/4"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	00000	0000000	00000
2"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	00000	0000000	00000
2 1/8"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	00000	0000000	00000
2 1/4"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	00000	0000000	00000
2 1/2"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	00000	0000000	00000
3"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	00000	0000000	00000
6"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	00000	0000000	00000
8"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	00000	0000000	000000
10"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	00000	0000000	000000

T-Handle Clamps

For Use With: Air, Plastic Pellets
Tubing: Use with galvanized steel, steel

T-handle clamps allow you to quickly disassemble and reassemble your line without tools. They offer very good corrosion resistance.

For Tube OD	Material	Gasket Material	Max. Pressure	Max. Vacuum		Each
1 1/2"	304 Stainless Steel	Gum Rubber	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	000000
2"	304 Stainless Steel	Gum Rubber	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	00000
2 1/4"	304 Stainless Steel	Gum Rubber	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	00000
2 1/2"	304 Stainless Steel	Gum Rubber	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	00000
3"	304 Stainless Steel	Gum Rubber	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	00000
3 1/4"	304 Stainless Steel	Gum Rubber	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	00000
5"	304 Stainless Steel	Gum Rubber	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	00000
6"	304 Stainless Steel	Gum Rubber	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	00000
8"	304 Stainless Steel	Gum Rubber	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	000000

Repair Clamps for Steel Tubing

For Use With: Air, Water
Temperature Range: -50° to 180° F
Tubing: Use with steel

Repair pinholes, punctures, and cracks in low-pressure systems with these clamps. Because of the full-coverage gasket and strip that bridges the opening between bolts, they work like couplings, fixing even full-circle breaks. Their neoprene gaskets can be used with air and water. Clamps are 304 stainless steel for very good corrosion resistance.

Choose a clamp that’s long enough to cover your damaged area and at least 1” on both sides. To install, insert your tubing into the clamp and tighten the bolt to create a secure seal.

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

Neoprene Rubber Gaskets—Full Coverage
For Tube OD	Material	Max. Pressure		Each
4" Lg.
2"	304 Stainless Steel	15 psi @ 72° F	00000000	000000
3"	304 Stainless Steel	15 psi @ 72° F	00000000	00000
4"	304 Stainless Steel	15 psi @ 72° F	00000000	00000
6"	304 Stainless Steel	15 psi @ 72° F	00000000	00000
6" Lg.
2"	304 Stainless Steel	15 psi @ 72° F	00000000	00000
3"	304 Stainless Steel	15 psi @ 72° F	00000000	00000
4"	304 Stainless Steel	15 psi @ 72° F	00000000	00000
6"	304 Stainless Steel	15 psi @ 72° F	00000000	00000
8" Lg.
2"	304 Stainless Steel	15 psi @ 72° F	00000000	00000
3"	304 Stainless Steel	15 psi @ 72° F	00000000	00000
4"	304 Stainless Steel	15 psi @ 72° F	00000000	00000
6"	304 Stainless Steel	15 psi @ 72° F	00000000	000000
12" Lg.
2"	304 Stainless Steel	15 psi @ 72° F	00000000	00000
3"	304 Stainless Steel	15 psi @ 72° F	00000000	000000
4"	304 Stainless Steel	15 psi @ 72° F	00000000	000000
6"	304 Stainless Steel	15 psi @ 72° F	00000000	000000

Repair Clamps for Copper Tubing

For Use With: Air, Diesel Fuel, Drinking Water, Hydraulic Fluid, Natural Gas, Oil, Water
Temperature Range: -20° to 180° F
Tubing: Use with K, M, L copper
Specifications Met: NSF/ANSI 61

Repair leaks in copper tubing. These clamps have a full-coverage gasket for fixing pinholes, cracks, and nearly full-circle breaks. They can also be used to add support to corroded tubing. Their Buna-N gasket works with a variety of media, such as air, water, oil, and hydraulic fluid. And since they meet NSF/ANSI 61, these clamps are safe to use with drinking water systems. They’re made of 304 stainless steel for very good corrosion resistance.

Choose a clamp that’s long enough to cover your damaged area with at least 1” on both sides. Clamps slide over tubing, so there’s no need to disassemble your system.

Copper tube size is the accepted designation of the copper tubing industry, not the actual OD.

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

Buna-N Rubber Gaskets—Full Coverage
Lg.	For Copper Tube Size	For Tube OD	Material	Max. Pressure	Max. Vacuum		Each
3"	1	1 1/8"	304 Stainless Steel	150 psi @ 72° F	15 in. of Hg @ 72° F	00000000	000000
6"	1	1 1/8"	304 Stainless Steel	150 psi @ 72° F	15 in. of Hg @ 72° F	00000000	000000

Low-Pressure Clamp-On Connectors for Air

For Use With: Air
Temperature Range:
Neoprene Rubber Gasket: -50° to 180° F
Silicone Rubber Gasket: -100° to 500° F
For Pipe Material: Stainless Steel, Iron, Steel, Aluminum, Copper, PVC Plastic, CPVC Plastic

Tighten the bolts on these connectors to join two pieces of rigid pipe of the same or different materials. They are for use in low-pressure air and vacuum conveying systems, as well as in gravity-flow systems. Connectors have a stainless steel strip that provides an escape route for electrostatic buildup when used in a fully grounded system.

Connectors with sleeve have an inner lining that protects the gasket.

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

Neoprene Rubber Gasket
For Pipe OD	For Pipe Size	Lg.	No. of Bolts	Max. Pressure	Max. Vacuum	Material	Nut Material	Bolt Material		Each
Connectors
0.84"	1/2	2"	2	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	000000
1.05"	3/4	2"	2	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
1.315"	1	4"	2	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
Connectors with 304 Stainless Steel Sleeve
1.66"	1 1/4	6"	3	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
1.9"	1 1/2	6"	3	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
2 3/8"	2	6"	3	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
2 7/8"	2 1/2	6"	3	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
3 1/2"	3	6"	3	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
4"	3 1/2	8"	4	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
4 1/2"	4	6"	3	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
5"	__	6"	3	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
5.563"	5	8"	4	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
6 5/8"	6	8"	4	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
8 5/8"	8	10"	4	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
10 3/4"	10	10"	4	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
Silicone Rubber Gasket
Connectors
0.84"	1/2	2"	2	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
1.05"	3/4	2"	2	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
1.315"	1	4"	2	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
Connectors with 304 Stainless Steel Sleeve
1.66"	1 1/4	6"	3	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
1.9"	1 1/2	6"	3	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
2 3/8"	2	6"	3	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
2 7/8"	2 1/2	6"	3	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
3 1/2"	3	6"	3	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
4"	3 1/2	8"	4	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
4 1/2"	4	6"	3	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
5"	__	6"	3	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
5.563"	5	8"	4	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	00000
6 5/8"	6	8"	4	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	000000
8 5/8"	8	10"	4	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	000000
10 3/4"	10	10"	4	15 psi @ 72° F	15 in. of Hg @ 72° F	Galvanized Steel	Zinc-Plated Steel	Zinc-Plated Steel	0000000	000000

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How to Identify and Measure Fittings

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

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

Clamps for Vacuum Fittings for Steel Tubing

Repair Clamps for Steel Tubing

Repair Clamps for Copper Tubing

Low-Pressure Clamp-On Connectors for Air