Glass Tube Adapters | McMaster-Carr

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	Material Material

	For Tube Material For Tube Material

Glass

Stainless Steel

Steel

	System of Measurement System of Measurement

Inch

	For Tube OD For Tube OD

	Shape Shape


Straight	90° Elbow

Tee	Wye

45° Elbow

	Connection Style Connection Style

	Type Type


Adapter	Reducer

Connector	Clamp

Flange

	For Use With For Use With

	Connection Type Connection Type

	Tube
	Pipe

	Maximum Vacuum Maximum Vacuum

1 × 10^-8 torr @
72° F

15 in. of Hg @ 72° F

	Vacuum Rating Vacuum Rating

Standard

High

	Minimum Temperature Minimum Temperature

	Maximum Temperature Maximum Temperature

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

DFARS Specialty Metals
COTS-Exempt

	Pipe Size Pipe Size

1 1/2
2
2 1/2
3
3 1/2
4
5
6

	Wall Thickness Wall Thickness

	Clamp-On Connection Type Clamp-On Connection Type

	Compression

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

RoHS Compliant

	Length Length

	Gender Gender

Male

Female

	Maximum Pressure Maximum Pressure

	Finish Finish

Galvanized

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

REACH Compliant

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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.

Quick-Connect High-Vacuum Fittings for Stainless Steel Tubing

Twist these fittings onto high-vacuum tubing to quickly make sealed, high-vacuum connections without the need for clamping, welding, or tools. To connect, insert your tubing into the fitting and twist the collar on the end of the fitting; an O-ring on the inside of the fitting compresses to form the seal. Also known as quick-disconnects, they're as easy to twist off as they are to twist on. Not for use in pressure applications.

Connectors have quick-connect fittings on both sides. Use them to connect two lengths of tubing: stainless steel to stainless steel, glass to glass, or go from one material to the other.

Adapters have a quick-connect fitting on one side and a quick-clamp fitting on the other. Use them to attach and remove components for one-off uses or to adapt your quick-clamp system to connect to glass tubing. Quick-clamp fittings are also known as KF, QF, and NW fittings; they require a clamp and ring (sold separately) to complete the connection.

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

Straight Connectors, Quick Connect

Straight Connector, Quick Connect

Connectors								Replacement O-Rings
For Tube OD	Wall Thick.	Max. Vacuum	Material	O-Ring Material	Temp. Range, °F		Each		Each
1/4"	0.118"	1 × 10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	0000000	0000000	0000000	00000
1/2"	0.078"	1 × 10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	0000000	000000	0000000	0000
3/4"	0.212"	1 × 10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	0000000	000000	0000000	0000
1"	0.18"	1 × 10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	0000000	000000	0000000	0000
1 1/2"	0.242"	1 × 10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	0000000	000000	0000000	0000
2"	0.242"	1 × 10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	0000000	000000	0000000	0000

Straight Adapters, Quick Connect × Quick Clamp

Straight Adapter, Quick Connect × Quick Clamp

Adapters
	Quick Clamp Tube Connection											Replacement O-Rings
For Tube OD (Quick Connect)	For Tube OD	Flange OD	High-Vacuum Flange Size	High Vacuum Connection Type	Wall Thick.	Max. Vacuum	Material	O-Ring Material	Temp. Range, °F		Each		Each
1/4"	3/4"	1.18"	16	ISO-KF	0.118"	1 × 10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	0000000	0000000	0000000	00000
1/2"	1"	1.57"	25	ISO-KF	0.118"	1 × 10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	0000000	000000	0000000	0000
3/4"	1"	1.57"	25	ISO-KF	0.055"	1 × 10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	0000000	000000	0000000	0000
1"	1"	1.57"	25	ISO-KF	0.055"	1 × 10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	0000000	000000	0000000	0000
1 1/2"	1 1/2"	2.16"	40	ISO-KF	0.055"	1 × 10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	0000000	000000	0000000	0000
2"	2"	2.95"	50	ISO-KF	0.118"	1 × 10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	0000000	000000	0000000	0000

Clamps

Clamp with Wing Nut

with Wing Nut
For Tube OD	For Flange OD	For High-Vacuum Flange Size	High Vacuum Connection Type	Material	Nut Material	Max. Vacuum	Temp. Range, °F	Specifications Met		Each
1/2", 3/4"	1.18"	10, 16	ISO-KF	Aluminum	Zinc Alloy	1 × 10 ^-7 torr @ 72° F	0° to 300°	ISO 2861	00000000	00000
1"	1.57"	25	ISO-KF	Aluminum	Zinc Alloy	1 × 10 ^-7 torr @ 72° F	0° to 300°	ISO 2861	0000000	00000
1 1/2"	2.16"	40	ISO-KF	Aluminum	Zinc Alloy	1 × 10 ^-7 torr @ 72° F	0° to 300°	ISO 2861	0000000	00000
2"	2.95"	50	ISO-KF	Aluminum	Zinc Alloy	1 × 10 ^-7 torr @ 72° F	0° to 300°	ISO 2861	0000000	00000

Rings

Ring

				Material
For Tube OD	For Flange OD	For High-Vacuum Flange Size	High Vacuum Connection Type	O-Ring	Inner Ring	Max. Vacuum	Temp. Range, °F	Specifications Met		Each
3/4"	1.18"	16	ISO-KF	Fluoroelastomer Rubber	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	0° to 300°	ISO 2861	00000000	00000
1"	1.57"	25	ISO-KF	Fluoroelastomer Rubber	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	0° to 300°	ISO 2861	0000000	0000
1 1/2"	2.16"	40	ISO-KF	Fluoroelastomer Rubber	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	0° to 300°	ISO 2861	0000000	00000
2"	2.95"	50	ISO-KF	Fluoroelastomer Rubber	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	0° to 300°	ISO 2861	0000000	00000

Vacuum Fittings for Steel Tubing

For Use With: Air, Glass, Plastic Pellets, Resins, Wood Chips
Temperature Range: -10° to 180° F
Tubing: Galvanized Steel: Use with steel, galvanized steel
Steel: Use with steel

Use these fittings to create an air vacuum system without the hassle of brazing and welding. Insert two fittings into a clamp (sold separately) and tighten to form a secure seal.

Galvanized steel fittings have fair corrosion resistance. Fittings without a finish should only be used in noncorrosive environments.

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

Straight Adapters, Tube × Male Threaded Pipe

				Galvanized Steel		Steel
For Tube OD	Pipe Size	Max. Pressure	Max. Vacuum		Each		Each
NPT Threads
2 1/8"	2	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	000000	0000000	000000
2 1/2"	2 1/2	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	00000	0000000	00000
3"	3	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	00000	0000000	00000
3 1/2"	3 1/2	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	00000	0000000	00000
4"	4	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	00000	0000000	00000
5"	5	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	000000	0000000	00000
6"	6	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	000000	0000000	000000

Straight Adapters, Tube × Female Threaded Pipe

				Galvanized Steel		Steel
For Tube OD	Pipe Size	Max. Pressure	Max. Vacuum		Each		Each
NPT Threads
2 1/8"	2	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	000000	0000000	000000
2 1/2"	2 1/2	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	00000	0000000	00000
3"	3	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	00000	0000000	00000
3 1/2"	3 1/2	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	000000	0000000	000000
4"	4	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	000000	0000000	00000
5"	5	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	000000	0000000	000000
6"	6	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	000000	0000000	000000

Straight Adapters with Cap, Tube × Male Threaded Pipe

Adapters with cap allow you to insert tubing to create a temporary connection.

NPT Threads
For Tube OD	Pipe Size	Material	Max. Pressure	Max. Vacuum		Each
1 1/2"	2	Zinc	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	000000
2"	2	Zinc	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	00000

Straight Reducers, Tube

				Galvanized Steel		Steel
For Tube OD (A)	For Tube OD (B)	Max. Pressure	Max. Vacuum		Each		Each
2 1/2"	2 1/8"	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	000000	0000000	000000
3"	2 1/8"	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	00000	0000000	00000
3 1/2"	2 1/8"	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	00000	0000000	00000
3 1/2"	2 1/2"	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	00000	0000000	00000
4"	2 1/8"	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	00000	0000000	00000
5"	2 1/8"	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	000000	0000000	000000
6"	2 1/8"	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	000000	0000000	000000

90° Elbow Connectors, Tube

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

45° Elbow Connectors, Tube

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

Tee Connectors, Tube

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

45° Tee Connectors, Tube

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

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

Fiberglass Pipe Flanges for Corrosive Chemicals

For Use With: Acetic Acid (75%), Alcohol, Calcium Chloride, Chlorine, Fuel Oil, Gasoline, Hydrochloric Acid (37%), Nitric Acid (10%), Oil, Phosphoric Acid, Salt Water (30%), Sodium Hydroxide (50%), Solvents, Sulfuric Acid (70%), Water
Temperature Range: 32° to 200° F
Specifications Met: ASTM D4024

Flanges have excellent corrosion resistance to handle a wide range of acids and other highly-corrosive chemicals. Use in metal surface treating applications, plating solution lines, and other chemical process applications. They are reinforced with fiberglass layers for better strength and durability than any of our other pipe flanges for chemicals. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line. Flanges meet ASTM D4024 specifications and testing requirements for product dimensions, performance, and material quality.

To connect flanges to pipe, first sand the inside of the flange and the end of the pipe to remove the surface finish. Next, mix the adhesive (sold separately) until the color is uniform with no streaks. Apply a thin layer of mixed adhesive to the sanded area of the pipe, approximately 1/8” thick. Repeat this process with the inside of the flange, applying a layer approximately 1/16” thick. After sealant has been applied, push the flange onto the pipe until it is fully engaged. Make sure you align the bolt holes prior to installing to minimize rotation after the flange is installed. Finally, use the adhesive-curing heat cable (sold separately) to cure the adhesive. Wrap the tape around the pipe and flange at the joint, taking care to not overlap the tape. Once you have waited the full cure time, the pipe and flange will be ready to use.

Warning: Never use plastic pipe flanges and pipe with compressed air or gas.

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

Fixed Flanges, Female Socket-Connect × Flanged

Front

Flat Surface on Back

Pipe Size	Socket Dp.	Flange OD	For Bolt Dia.	Bolt Hole Dia.	Number of Bolt Holes	Bolt Circle Dia.	Material	Color	Max. Pressure		Each
1 1/2	1 3/8"	5"	1/2"	5/8"	4	3 7/8"	Fiberglass	Black	300 psi @ 72° F	0000000	0000000
2	1 3/4"	6"	5/8"	3/4"	4	4 3/4"	Fiberglass	Black	250 psi @ 72° F	0000000	000000
3	2"	7 1/2"	5/8"	3/4"	4	6"	Fiberglass	Black	250 psi @ 72° F	0000000	000000
4	2 1/2"	9"	5/8"	3/4"	8	7 1/2"	Fiberglass	Black	150 psi @ 72° F	0000000	000000

Pipe Cement (11.8-fl. oz. Can)

0000000

Each

000000

Adhesive-Curing Heat Cable

Voltage	Max. Heat Output, °F	Lg.	Wd.	Thick.	Plug Type	Cord Lg.		Each
120V AC	270°	6 ft.	1"	1/8"	Two Prong	6 ft.	0000000	0000000