2 1/8" Tubing | McMaster-Carr

Metal interlocked strips create a rigid, durable hose that stays strong under high temperatures. Hose is for use with smoke, welding fumes, and oil fumes.

Galvanized steel offers fair corrosion resistance.

Galvanized Steel
ID	OD	Bend Radius	Interior Surface Texture	Other Lengths, ft.		5 ft.	6 ft.	7 ft.	8 ft.	9 ft.	10 ft.	15 ft.	20 ft.	25 ft.
0.012" Material Thick.
2 1/8"	2 5/16"	7"	Ribbed	1 to 50	0000000	000000	000000	000000	000000	000000	000000	000000	000000	000000

Low-Carbon Steel Round Tubes

Also known as mild steel, low-carbon steel is easy to machine, form, and weld. It's widely fabricated into parts that don’t require high strength, such as fixture clamps, mounting plates, and spacers. This material can be surface hardened with heat treating.

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

Certificates with a traceable lot number are available for these products. Download certificates from ACTIVITY after your order ships.

Tubes

Yield Strength: See table
Hardness: See table
Heat Treatable: No
Specifcations Met: See Table

0.188" Wall Thick. (Oversized Tolerance)
OD	OD Tolerance	ID	Yield Strength, psi	Heat Treatment	Hardness	Specifications Met		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
2 1/2"	0" to 0.008"	2 1/8"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	000000	0000000	0000000

Corrosion-Resistant 316 Stainless Steel

The addition of molybdenum gives 316 stainless steel excellent corrosion resistance. Use it in a variety of marine and chemical-processing applications. It maintains its corrosion resistance up to the maximum temperature.

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

Certificates with a traceable lot number are available for these products. Download certificates from ACTIVITY after your order ships.

Round Tubes

Yield Strength: 30,000 psi
Hardness: Rockwell B80 (Medium)
Heat Treatment: Annealed (Softened)
Heat Treatable: No
Specifications Met: See Table

316 Stainless Steel
OD	OD Tolerance	ID	Fabrication	Straightness Tolerance	Specifications Met		1/2 ft. Lg.	1 ft. Lg.	2 ft. Lg.	4 ft. Lg.
0.188" Wall Thick. (-0.026" to 0.026" Tolerance)
2 1/2"	-0.023" to 0.023"	2 1/8"	Seamless	0.045" per 3 ft.	ASTM A511	00000000	000000	0000000	0000000	0000000

Clear Scratch- and UV-Resistant Cast Acrylic Tubes

Color: Clear
Temperature Range: 0° to 150° F
Tensile Strength: 10,000-11,250 psi (Good)
Impact Strength: 0.3-0.4 ft.-lbs./in. (Poor)
Hardness: Rockwell M94-M100 (Hard)
For Use Outdoors: Yes
Specifications Met: See table

Fabricate containers, tanks, and lenses for light fixtures with these scratch- and UV-resistant cast acrylic tubes. Cast acrylic, which is comparable to Lucite and Plexiglas® Acrylic, is easier to machine than extruded acrylic. This material stands up to outdoor use better than polycarbonate and maintains clarity over time.

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

3/16" Wall Thick.
OD	OD Tolerance	ID	Lengths, ft.	Specifications Met		Per Ft.
2 1/2"	-0.020" to 0.020"	2 1/8"	1, 3, 5	ASTM D5436, FDA Compliant 21 CFR 177.1010, UL 94 HB	00000000	000000

Clear Impact-Resistant Polycarbonate Tubes

Color: Clear
Temperature Range: -40° to 200° F
Tensile Strength: 8,900-9,500 psi (Good)
Impact Strength: 12-18 ft.-lbs./in. (Excellent)
Hardness: Rockwell R118 (Hard)
For Use Outdoors: No

Comparable to Lexan, Hyzod, Tuffak, and Makrolon, these polycarbonate tubes are half the weight of glass and maintain excellent impact resistance across a wide temperature range. Use them to make instrument gauge covers and display racks.

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

Round Tubes

1/16" Wall Thick. (-0.0045" to 0.0055")
OD	OD Tolerance	ID	ID Tolerance	Specifications Met		1 ft. Lg.	2 ft. Lg.	3 ft. Lg.	4 ft. Lg.	8 ft. Lg.
2 1/4"	-0.020" to 0.020"	2 1/8"	-0.020" to 0.020"	FDA Compliant 21 CFR 177.1580, UL 94 HB	0000000	00000	000000	000000	000000	000000

Hook-and-Loop Wrap-Around
Sleeving for Universal Robots

Organize and protect the cables and tubing on your Universal Robots arm without hindering its movement. This sleeving is made for Universal Robots arms, so you don’t need to measure, cut, or customize for a good fit. The hook-and-loop closure makes installation quick, and unlike cable ties, it’s easy to detach and adjust. Cables run through a separate channel, so you can access them without removing the sleeving from your arm. Made from polyurethane, this sleeving is flexible enough for cables and tubing to move easily, and durable enough to withstand continuous movement. It’s also lighter than hose carriers and conduit, so it won’t weigh down your robot arm. Each includes two pieces of sleeving.

Polyurethane Rubber
ID	Wd.	Lg.	Wall Thick.	Temperature Range, °F	Features	Cable Opening Wd.	Color		Each
For UR3 and UR3e Series Robot Arms
2 1/8" 2 5/8"	3 1/4" 3 1/4"	10 7/8" 12 3/8"	0.018"	-60° to 200°	Cable Channel	1"	Black	00000000	000000

Pressure-Rated Borosilicate Glass Tubes

Color: Clear
Max. Temperature: See table
Fabrication: Annealed

These short glass tubes can be used as glass bowls in oil dispensers. Borosilicate glass resists clouding and pitting and is highly chemical resistant. With a low rate of thermal expansion, it stays dimensionally stable during changes in temperature.

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

OD	ID	Wall Thick.	Lg.	Max. Pressure, psi	Max. Temperature, °F	Edge Fabrication	Specifications Met		Each
2 1/2"	2 1/8"	3/16"	2 3/8"	100	185°	Ground	MIL-G-47033	0000000	000000

Flexible Rubber Foam Pipe Insulation

Soft and easy to install, this insulation restricts absorption of water, air, and gas. It is often used on cold and hot water lines and refrigeration lines. Seal with contact adhesive (sold separately). To use outdoors, coat in acrylic paint.

Slit tubes have an adhesive strip closure.

Unslit Tubes

Unslit Tube

Temperature Range: -295° to 220° F
Heat Flow Rate: 0.25 Btu @ 75° F
Density: 4.5 lbs./cu. ft.
Color: Black
Specifications Met: ASTM E84 25/50 for Flame and Smoke, ASTM C534

3/8" Wall Thick.
ID	For Copper Tube Size	Lg., ft.	Flexibility	R Value		Each
2 1/8"	2	6	Flexible	1.5	00000000	00000
1/2" Wall Thick.
2 1/8"	2	6	Flexible	2	00000000	0000
3/4" Wall Thick.
2 1/8"	2	6	Flexible	3	00000000	00000

White Acrylic Coating (1-qt. Can)	00000000	Each	000000
Contact Adhesive (16-oz. Brush-Top Can)	00000000	Each	00000

Slit Tubes

Slit Tube

Temperature Range: -295° to 180° F
Heat Flow Rate: 0.25 Btu @ 75° F
Density: 4.5 lbs./cu. ft.
Color: Black
Specifications Met: ASTM E84 25/50 for Flame and Smoke, ASTM C534

1/2" Wall Thick.
ID	For Copper Tube Size	Lg., ft.	Flexibility	R Value		Each
2 1/8"	2	6	Flexible	2	00000000	000000
3/4" Wall Thick.
2 1/8"	2	6	Flexible	3	00000000	00000
1" Wall Thick.
2 1/8"	2	6	Flexible	4	00000000	00000

White Acrylic Coating (1-qt. Can)	00000000	Each	000000
Contact Adhesive (16-oz. Brush-Top Can)	00000000	Each	00000

90° Elbows

Elbow

Temperature Range: -295° to 220° F
Heat Flow Rate: 0.25 Btu @ 75° F
Density: 4.5 lbs./cu. ft.
Color: Black
Specifications Met: ASTM E84 25/50 for Flame and Smoke, ASTM C534

3/8" Wall Thick.
ID	For Copper Tube Size	Flexibility	Tube Style	R Value		Each
2 1/8"	2	Flexible	Slit	1.5	00000000	00000
1/2" Wall Thick.
2 1/8"	2	Flexible	Slit	2	00000000	0000
3/4" Wall Thick.
2 1/8"	2	Flexible	Slit	3	00000000	00000
1" Wall Thick.
2 1/8"	2	Flexible	Slit	4	00000000	00000

White Acrylic Coating (1-qt. Can)	00000000	Each	000000
Contact Adhesive (16-oz. Brush-Top Can)	00000000	Each	00000

Tees

Tee

Temperature Range: -295° to 220° F
Heat Flow Rate: 0.25 Btu @ 75° F
Density: 4.5 lbs./cu. ft.
Color: Black
Specifications Met: ASTM E84 25/50 for Flame and Smoke, ASTM C534

3/8" Wall Thick.
ID	For Copper Tube Size	Flexibility	Tube Style	R Value		Each
2 1/8"	2	Flexible	Slit	1.5	00000000	00000
1/2" Wall Thick.
2 1/8"	2	Flexible	Slit	2	00000000	0000
3/4" Wall Thick.
2 1/8"	2	Flexible	Slit	3	000000000	00000
1" Wall Thick.
2 1/8"	2	Flexible	Slit	4	000000000	00000

White Acrylic Coating (1-qt. Can)	00000000	Each	000000
Contact Adhesive (16-oz. Brush-Top Can)	00000000	Each	00000

Economical Flexible Polyethylene Foam Pipe Insulation

Less flexible than rubber foam, this insulation restricts absorption of water, air, and gas. It is typically used in plumbing applications. Seal with contact adhesive (sold separately). To use outdoors, coat in acrylic paint.

Slit tubes have an adhesive strip closure.

Unslit Tubes

Unslit Tube

Temperature Range: 0° to 180° F
Heat Flow Rate: 0.270 Btu @ 75° F
Density: 1.5 lbs./cu. ft.
Color: Black
Specifications Met: ASTM E84 25/50 for Flame and Smoke

3/8" Wall Thick.
ID	For Copper Tube Size	Lg., ft.	Flexibility	R Value		Each
2 1/8"	2	6	Flexible	1.4	00000000	00000
1/2" Wall Thick.
2 1/8"	2	6	Flexible	2	00000000	0000
3/4" Wall Thick.
2 1/8"	2	6	Flexible	3	00000000	00000

Contact Adhesive (16-oz. Brush-Top Can)	00000000	Each	000000
White Acrylic Coating (1-qt. Can)	00000000	Each	00000

Slit Tubes

Slit Tube

Temperature Range: -295° to 200° F
Heat Flow Rate: 0.270 Btu @ 75° F
Density: 1.5 lbs./cu. ft.
Color: See table
Specifications Met: See table

3/8" Wall Thick.
ID	For Copper Tube Size	Lg., ft.	Flexibility	Specifications Met	R Value		Each
Black
2 1/8"	2	6	Flexible	ASTM E84 25/50 for Flame and Smoke, ASTM C1427 Type I	1.4	000000000	00000
1/2" Wall Thick.
Black
2 1/8"	2	6	Flexible	ASTM E84 25/50 for Flame and Smoke, ASTM C1427 Type I	2	000000000	00000
White
2 1/8"	2	6	Flexible	ASTM E84 25/50 for Flame and Smoke, ASTM C1427 Type I	2	000000000	00000
3/4" Wall Thick.
Black
2 1/8"	2	6	Flexible	ASTM E84 25/50 for Flame and Smoke, ASTM C1427 Type I	3	000000000	00000

Foam, Masonry, Metal, Plastic, Rubber	00000000	Each	000000
White Acrylic Coating (1-qt. Can)	00000000	Each	00000

90° Elbows

Elbow

Temperature Range: -330° to 210° F
Heat Flow Rate: 0.245 Btu @ 75° F
Density: 1.5 lbs./cu. ft.
Color: Black
Specifications Met: ASTM C1427 Type I, ASTM E84 25/50 for Flame and Smoke

3/8" Wall Thick.
ID	For Copper Tube Size	Flexibility	Tube Style	R Value		Each
2 1/8"	2	Flexible	Slit	1.5	0000000	00000
1/2" Wall Thick.
2 1/8"	2	Flexible	Slit	2	0000000	0000

Foam, Masonry, Metal, Plastic, Rubber	00000000	Each	000000
White Acrylic Coating (1-qt. Can)	00000000	Each	00000

Tees

Tee

Temperature Range: -330° to 210° F
Heat Flow Rate: 0.245 Btu @ 75° F
Density: 1.5 lbs./cu. ft.
Color: Black
Specifications Met: ASTM C1427 Type I, ASTM E84 25/50 for Flame and Smoke

3/8" Wall Thick.
ID	For Copper Tube Size	Flexibility	Tube Style	R Value		Each
2 1/8"	2	Flexible	Slit	1.5	0000000	00000
1/2" Wall Thick.
2 1/8"	2	Flexible	Slit	2	0000000	0000

Foam, Masonry, Metal, Plastic, Rubber	00000000	Each	000000
White Acrylic Coating (1-qt. Can)	00000000	Each	00000

Tear-Resistant Silicone Foam Pipe Insulation

Temperature Range: -65° to 500° F
Heat Flow Rate: 0.39 Btu @ 75° F
Density: 45 lbs./cu. ft.
Color: Black

Even at high temperatures, these tubes remain flexible to stretch over components without tearing. They restrict absorption of water, air, and gas and are typically used on hot and cold water lines and electrical components.

3/8" Wall Thick.
ID	ID Tolerance Range	For Copper Tube Size	Lg., ft.	R Value	Flexibility		Each
2 1/8"	-0.5" to 0.5"	2	6	1	Flexible	00000000	0000000

Fiberglass Pipe Insulation

This common insulation material is typically used on hot and cold water lines and in process piping. To use outdoors, add metal jacketing.

Tubes, elbows, and tees are formed to provide the best fit on pipe and are the easiest to install. If your pipe is larger than the sizes we offer, choose a sheet/strip.

Tubes have an all-service jacket (ASJ) made of kraft paper with an adhesive strip closure. Seal with reinforced insulation tape (sold separately).

Tubes with Kraft Paper Jacketing

Tube

Temperature Range: 0° to 850° F
Jacket Temperature Range: -20° to 150° F
Heat Flow Rate: 0.23 Btu @ 75° F
Density: 4.5 lbs./cu. ft.
Color: Yellow
Jacket Color: White
Specifications Met: ASTM E84 25/50 for Flame and Smoke, ASTM C547, ASTM C585

1/2" Wall Thick.
ID	For Copper Tube Size	Lg., ft.	Flexibility	R Value		Each
2 1/8"	2	3	Rigid	2.2	0000000	00000
1" Wall Thick.
2 1/8"	2	3	Rigid	4.3	0000000	00000
1 1/2" Wall Thick.
2 1/8"	2	3	Rigid	6.5	0000000	00000
2" Wall Thick.
2 1/8"	2	3	Rigid	8.7	0000000	00000

Reinforced Insulation Tape (3" × 30 ft.)

00000000

Each

00000

90° Elbows

Elbow

Temperature Range: 0° to 1000° F
Heat Flow Rate: 0.23 Btu @ 75° F
Density: 5 lbs./cu. ft.
Color: Brown
Specifications Met: ASTM E84 25/50 for Flame and Smoke, ASTM C585

1" Wall Thick.
ID	For Copper Tube Size	Flexibility	R Value		Each
2 1/8"	2	Rigid	4.3	00000000	00000
1 1/2" Wall Thick.
2 1/8"	2	Rigid	6.5	00000000	00000
2" Wall Thick.
2 1/8"	2	Rigid	8.7	00000000	00000

Tees

Tee

Temperature Range: 0° to 1000° F
Heat Flow Rate: 0.23 Btu @ 75° F
Density: 5 lbs./cu. ft.
Color: Brown
Specifications Met: ASTM E84 25/50 for Flame and Smoke, ASTM C585

1" Wall Thick.
ID	For Copper Tube Size	Flexibility	R Value		Each
2 1/8"	2	Rigid	4.3	00000000	00000
1 1/2" Wall Thick.
2 1/8"	2	Rigid	6.5	00000000	00000
2" Wall Thick.
2 1/8"	2	Rigid	8.7	00000000	00000