2 7/8" Tubing | McMaster-Carr

Rigid
Compatible Clamps: U-Bolt Clamps
Max. Temperature: Galvanized Steel: 750° F; Aluminum: 450° F; 304 Stainless Steel: 1500° F; 316 Stainless Steel: 1200° F

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.

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

Galvanized Steel
ID	OD	Bend Radius	Interior Surface Texture		5 ft.	6 ft.	7 ft.	8 ft.	9 ft.	10 ft.	15 ft.	20 ft.	25 ft.
0.012" Material Thick.
2 7/8"	3 3/16"	10"	Ribbed	0000000	000000	000000	000000	000000	000000	000000	000000	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.
3 1/4"	-0.030" to 0.030"	2 7/8"	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.
3"	-0.020" to 0.020"	2 7/8"	-0.020" to 0.020"	FDA Compliant 21 CFR 177.1580, UL 94 HB	0000000	000000	000000	000000	000000	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.

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

Slit Tubes

Slit 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

1/2" Wall Thick.
ID	For Pipe Size	Lg., ft.	Flexibility	R Value		Each
Buna-N/PVC Foam
2 7/8"	2 1/2	6	Flexible	2	00000000	000000
3/4" Wall Thick.
Buna-N/PVC Foam
2 7/8"	2 1/2	6	Flexible	3	00000000	00000
1" Wall Thick.
Buna-N/PVC Foam
2 7/8"	2 1/2	6	Flexible	4	00000000	00000

White Acrylic Coating (1-qt. Can)	00000000	Each	000000
Contact Adhesive (16-fl. 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

				1/2" Wall Thick.
ID	For Pipe Size	Flexibility	Tube Style	R Value		Each
Buna-N/PVC Foam
2 7/8"	2 1/2	Flexible	Slit	2	00000000	00000

White Acrylic Coating (1-qt. Can)	00000000	Each	000000
Contact Adhesive (16-fl. 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

				1/2" Wall Thick.			1" Wall Thick.
ID	For Pipe Size	Flexibility	Tube Style	R Value		Each	R Value		Each
Buna-N/PVC Foam
2 7/8"	2 1/2	Flexible	Slit	2	000000000	000000	4	000000000	000000

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

Economical Flexible Polyethylene Foam Pipe Insulation

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

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 Pipe Size	Lg., ft.	Flexibility	Specifications Met	R Value		Each
Black
2 7/8"	2 1/2	6	Flexible	ASTM E84 25/50 for Flame and Smoke	1.4	000000000	000000
1/2" Wall Thick.
Black
2 7/8"	2 1/2	6	Flexible	ASTM E84 25/50 for Flame and Smoke	2	000000000	00000
3/4" Wall Thick.
Black
2 7/8"	2 1/2	6	Flexible	ASTM E84 25/50 for Flame and Smoke	3	000000000	00000

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

Mineral Wool Pipe Insulation

These insulation tubes and sheets meet ASTM E84 standards for flame and smoke. They are typically used in process piping and mechanical systems and perform best at temperatures up to 600° F. To use outdoors, add metal jacketing.

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

Tubes

Temperature Range: 0° to 1200° F
Heat Flow Rate: 0.23 Btu @ 75° F
Density: 8 lbs./cu. ft.
Color: Yellow
Specifications Met: See table

1" Wall Thick.
ID	For Pipe Size	Lg., ft.	Flexibility	Specifications Met	R Value		Each
2 7/8"	2 1/2	3 1/4	Rigid	ASTM E84 0/0 for Flame and Smoke, ASTM C547	4.3	00000000	000000
1 1/2" Wall Thick.
2 7/8"	2 1/2	3 1/4	Rigid	ASTM E84 0/0 for Flame and Smoke, ASTM C547	6.5	00000000	00000
2" Wall Thick.
2 7/8"	2 1/2	3 1/4	Rigid	ASTM E84 0/0 for Flame and Smoke, ASTM C547	8.7	00000000	00000

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).

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

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 Pipe Size	Lg., ft.	Flexibility	R Value		Each
2 7/8"	2 1/2	3	Rigid	2.2	0000000	00000
1" Wall Thick.
2 7/8"	2 1/2	3	Rigid	4.3	0000000	00000
1 1/2" Wall Thick.
2 7/8"	2 1/2	3	Rigid	6.5	0000000	00000
2" Wall Thick.
2 7/8"	2 1/2	3	Rigid	8.7	0000000	00000
3" Wall Thick.
2 7/8"	2 1/2	3	Rigid	13	00000000	00000

Reinforced Insulation Tape (3" × 30 ft.)

00000000

Each

000000

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 Pipe Size	Flexibility	R Value		Each
2 7/8"	2 1/2	Rigid	4.3	00000000	000000
1 1/2" Wall Thick.
2 7/8"	2 1/2	Rigid	6.5	00000000	00000
2" Wall Thick.
2 7/8"	2 1/2	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 1/2" Wall Thick.
ID	For Pipe Size	Flexibility	R Value		Each
2 7/8"	2 1/2	Rigid	6.5	00000000	000000

Ultra-Insulating Low-Temperature Polyisocyanurate Foam Pipe Insulation

This very rigid insulation offers the lowest heat-flow rate of our pipe insulation and restricts absorption of water, air, and gas. It is typically used in process piping and chiller plants and performs best in applications below 50° F. To use outdoors, add metal jacketing.

Tubes have a kraft paper all-service jacket (ASJ) that resists mold and mildew by allowing moisture to evaporate. They have an adhesive strip closure.

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

Tubes with Kraft Paper Jacketing

Tube

Temperature Range: -295° to 300° F
Jacket Temperature Range: -40° to 240° F
Heat Flow Rate: 0.17 Btu @ 75° F
Density: 2 lbs./cu. ft.
Color: Green
Jacket Color: White
Specifications Met: ASTM E84 25/50 for Flame and Smoke

				1" Wall Thick.			2" Wall Thick.
ID	For Pipe Size	Lg., ft.	Flexibility	R Value		Each	R Value		Each
2 7/8"	2 1/2	3	Rigid	5.9	0000000	000000	11.8	00000000	000000

90° Elbows

Elbow

Temperature Range: -295° to 300° F
Heat Flow Rate: 0.17 Btu @ 75° F
Density: 2 lbs./cu. ft.
Color: Green
Specifications Met: ASTM E84 25/50 for Flame and Smoke

			1" Wall Thick.			2" Wall Thick.
ID	For Pipe Size	Flexibility	R Value		Each	R Value		Each
2 7/8"	2 1/2	Rigid	5.9	0000000	000000	11.8	00000000	000000

Tees

Tee

Temperature Range: -295° to 300° F
Heat Flow Rate: 0.17 Btu @ 75° F
Density: 2 lbs./cu. ft.
Color: Green
Specifications Met: ASTM E84 25/50 for Flame and Smoke

			1" Wall Thick.			2" Wall Thick.
ID	For Pipe Size	Flexibility	R Value		Each	R Value		Each
2 7/8"	2 1/2	Rigid	5.9	0000000	000000	11.8	00000000	000000

Round Shipping Tubes with Slip-On End Caps

Push the 6" long cap down onto one end to close; the other end has a permanent steel cap. Use these tubes to mail and protect blueprints, posters, long parts, and rods. Tape the seam of the cap to keep contents secure during shipping.

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

									Each
ID	Inside Lg.	Thick.	Color	Material	Construction	End Cap Material	End Caps Included		1-23	24-Up
2 7/8"	24"	1/8"	White	Cardboard	Corrugated	Cardboard and Steel	Yes	00000000	00000	00000
2 7/8"	36"	1/8"	White	Cardboard	Corrugated	Cardboard and Steel	Yes	00000000	0000	0000
2 7/8"	42"	1/8"	White	Cardboard	Corrugated	Cardboard and Steel	Yes	00000000	0000	0000

Oil-Resistant Buna-N Gaskets for Gasket Tube Fittings

In addition to oil, these Buna-N gaskets resist water and salts. Use them to seal gasket tube fittings for stainless steel tubing.

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

For Tube OD	ID	OD	Thick.	Temp. Range, ° F	Color		Each
3"	2 7/8"	3.475"	0.35"	-30° to 200°	Black	0000000	00000

Ultra-Chemical-Resistant Metal-Detectable
PTFE Gaskets for Gasket Tube Fittings

Made from a blend of PTFE and 316 stainless steel, these gaskets stand up to the harsh chemicals and high pressures and temperatures used in sanitary processes. They’ll set off metal detectors if any part of them falls into your line, so you can stop contaminated material from leaving your facility. This helps you comply with Hazard Analysis and Critical Control Point (HACCP) programs. Use these gaskets with high-polish gasket fittings (also called bevel seat fittings) for a more secure seal than quick-clamp sanitary tube fittings.

These gaskets are more durable and last longer than standard PTFE seals. Hot oil, steam, and harsh cleaners won’t warp or deform them, preventing leaks. They’re also chemically inert, so they won’t contaminate your line by absorbing and leaching substances, unless you use molten alkali metal or elemental fluorine. Use them where purity is necessary, such as in food, pharmaceutical, or biotech facilities.

With an extremely smooth interior, these gaskets are easy to clean and leave minimal places for bacteria to grow. To minimize safety risks, they are Animal Derived Ingredient (ADI) free, meaning they’re made without animal products, and are FDA compliant for direct contact with food. Meeting the highest sanitary design standards, these gaskets are 3-A and USP VI certified. They’re also tested to USP 87 standards, which are created by the United States Pharmacopoeia (USP) for safety in biological applications.

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

For Tube OD	ID	OD	Thick.	Temp. Range, °F	Hardness	Hardness Rating	Color	Specifications Met		Each
3"	2 7/8"	3.475"	0.32"	-350° to 550°	Durometer 68D	Extra Hard	Gray	3-A Certified 20-27, FDA Compliant 21 CFR 177.1550, USP VI Certified	0000000	000000

Chemical-Resistant PTFE Gaskets for Gasket Tube Fittings

These gaskets are made of PTFE, which is chemically inert (except to molten alkali metal and elemental fluorine). Use them to seal gasket tube fittings for stainless steel tubing. They’re 3-A certified to meet industry approved sanitary design standards.

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

For Tube OD	ID	OD	Thick.	Temp. Range, ° F	Hardness	Hardness Rating	Color	Specifications Met		Each
3"	2 7/8"	3.475"	0.35"	-100° to 500°	Durometer 68D	Extra Hard	White	3-A Certified 20-27	0000000	00000