2 3/4" Tubing | McMaster-Carr

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

REACH Compliant

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

DFARS Specialty Metals
COTS-Exempt

	Aluminum Performance Properties Aluminum Performance Properties

Easy to Machine

Corrosion Resistant

Easy to Weld

	Length Length

36 Products

About Hose

About Durometer Hardness Scales

About Duct Hose

About Plastic

About Sleeving

About Plastic and Rubber Tubing

About Aluminum

About Selecting Thermal Insulation

About Stainless Steel

About Composites

About Carbon Steel, Alloy Steel, Spring Steel, and Cast Iron

High-Pressure Hard Plastic Tubing for Air and Water

Excellent strength and durability allow this tubing to handle high-pressure air and water applications.

Polycarbonate tubing won’t degrade when exposed to the damaging effects of ultraviolet light. It should be used at temperatures above freezing. Tubing is clear, so you can easily monitor flow. It is rigid and does not bend.

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

Clear Polycarbonate Plastic

Clear Polycarbonate Plastic Tubing

Rigid
Compatible with Socket Connect Tube Fittings
Hard (Rockwell R120)
Temperature Range: 32° to 250°F

Inch
ID	OD	Wall Thick.	Max. Pressure	Color		2 ft.	4 ft.	8 ft.
2 3/4"	3"	1/8"	110 psi @ 72 ° F	Clear	0000000	000000	000000	000000

High-Temperature Rigid Metal Duct Hose for Fumes

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.

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 3/4"	2 7/8"	8 1/2"	Ribbed	1 to 50	0000000	000000	000000	000000	000000	000000	000000	000000	000000	0000000

Extra-Strength High-Vacuum Duct Hose for Metal Chips and Shavings

Rigid
Compatible Clamps: Bolt Clamps
Color: Black
Temperature Range: -40° to 160° F

The strongest nonmetal duct hose we offer, this SBR rubber hose is reinforced with yarn and has a metal spiral. Hose has a smooth interior for unrestricted flow.

Warning: Hose should not be used for applications that generate a static charge.

						Spiral
ID	OD	Bend Radius	Max. Vacuum	Material Thick.	Interior Surface Texture	Direction	Material	Max. Continuous Lg., ft.		Per Ft.
Per Foot
SBR Rubber
2 3/4"	3 3/16"	9"	29 in. of Hg @ 72° F	0.21"	Smooth	Right Hand	Metal	50	0000000	000000
										Each
Full Coil
SBR Rubber
2 3/4"	3 3/16"	9"	29 in. of Hg @ 72° F	0.21"	Smooth	Right Hand	Metal	50	00000000	000000

High-Temperature Flexible Duct Hose for Dust

Flexible
Compatible Clamps: Worm-Drive Clamps
Color: Black
Temperature Range: -60° to 300° F

The neoprene coating on this hose holds up under high heat. Hose meets UL 94 V-0 for flame retardance. It has a smooth interior for unrestricted flow. Hose is for use with lint, dust, and sawdust.

Warning: Hose should not be used for applications that generate a static charge.

								Spiral					Per Ft.
ID	OD	Bend Radius	Compresses To	Max. Vacuum	Max. Pressure	Material Thick.	Interior Surface Texture	Direction	Material	Specifications Met	Max. Continuous Lg., ft.		1-11	12-Up
Neoprene-Coated Fiberglass
2 3/4"	2 7/8"	1 1/2"	75%	17 in. of Hg @ 72° F	34 psi @ 72° F	0.024"	Smooth	Left Hand	Metal	UL 94 V-0	12	00000000	000000	000000

High-Temperature Coolant Hose

Temperature Range: -65° to 350° F
Material: Silicone Rubber
Color: Blue
For Clamp Type: Worm Drive

Silicone rubber gives this hose, often called radiator hose, the ability to handle high-heat conditions. Hose with steel wire reinforcement resists kinking.

						Per Ft.
ID	OD	Max. Pressure	Internal Reinforcement	Max. Continuous Lg., ft.		1-11	12-Up
2 3/4"	3 1/8"	30 psi @ 72° F	Yarn	12	00000000	000000	000000
2 3/4"	3 1/8"	100 psi @ 72° F	Steel Wire	12	0000000	00000	00000

Coolant Hose

Temperature Range: 0° to 210° F
Material: Buna-N Rubber
Color: Black with Green Stripe
For Clamp Type: Worm Drive

Commonly known as radiator hose, this hose is for low-pressure coolant applications.

					Per Ft.
ID	OD	Max. Pressure	Max. Continuous Lg., ft.		1-24	25-Up
2 3/4"	3 1/8"	35 psi @ 72° F	25	00000000	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.

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 ORDER HISTORY after your order ships.

Tubes

Yield Strength: See table
Hardness: See table
Heat Treatable: See table
Specifcations Met: See table

0.188" Wall Thick. (Oversized Tolerance)
OD	OD Tolerance	ID	Yield Strength, psi	Heat Treatable	Heat Treatment	Hardness	Specifications Met		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
3 1/8"	0" to 0.009"	2 3/4"	45,000	No	Stress Relieved	Rockwell B60 (Medium)	ASTM A513 Type 5	0000000	000000	0000000	0000000

Multipurpose 4140 Alloy Steel Tubes

Yield Strength: 60,000 psi
Hardness: Rockwell B85 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C60
Specifications Met: ASTM A519

Also known as chrome-moly steel, this versatile 4140 alloy steel is used for a wide range of parts, such as gears, axles, shafts, collets, and die holders. It resists fracturing from repeated stress.

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 ORDER HISTORY after your order ships.

1/2" Wall Thick. (-0.05" to 0.05" Tolerance)
OD	OD Tolerance	ID	Heat Treatment	Straightness Tolerance		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
3 3/4"	-0.025" to 0.025"	2 3/4"	Annealed (Softened)	0.030" per ft.	0000000	0000000	0000000	0000000
5/8" Wall Thick. (-0.063" to 0.063" Tolerance)
4"	-0.025" to 0.025"	2 3/4"	Annealed (Softened)	0.030" per ft.	0000000	000000	000000	000000
3/4" Wall Thick. (-0.075" to 0.075" Tolerance)
4 1/4"	-0.025" to 0.025"	2 3/4"	Annealed (Softened)	0.030" per ft.	0000000	000000	000000	000000

Multipurpose 6061 Aluminum Round Tubes

Yield Strength: 35,000 psi
Hardness: Brinell 95 (Soft)
Temper: See table
Fabrication: Extruded
Specifications Met: See table

The most widely used aluminum, 6061 is fabricated into everything from pipe fittings and containers to automotive and aerospace parts. It is strong and corrosion resistant, plus it's easy to machine and weld.

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 ORDER HISTORY after your order ships.

1/8" Wall Thick. (-0.02" to 0.02" Tolerance)
OD	OD Tolerance	ID	Temper	Heat Treatment	Temperature Range, °F	Specifications Met	Straightness Tolerance		1/2 ft. Lg.	1 ft. Lg.	2 ft. Lg.	3 ft. Lg.	6 ft. Lg.
3"	-0.035" to 0.035"	2 3/4"	T6	Hardened	-320° to 300°	ASTM B221	0.020" per ft.	0000000	000000	000000	000000	000000	0000000
3/8" Wall Thick. (-0.021" to 0.021" Tolerance)
3 1/2"	-0.035" to 0.035"	2 3/4"	T6511	Hardened	-320° to 300°	ASTM B241	0.020" per ft.	0000000	00000	00000	000000	000000	000000

Multipurpose 304 Stainless Steel

From cookware to chemical-processing equipment, 304 stainless steel is a good all-around choice for a wide range of applications. It maintains its corrosion resistance in temperatures up to 1500° F.

304/304L stainless steel contains less carbon than standard 304 for better weldability.

Seamless round tubes are more corrosion resistant than welded tubes because they don’t have a seam that could potentially introduce impurities.

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 ORDER HISTORY after your order ships.

304/304L Stainless Steel Round Tubes

Yield Strength: See Table
Hardness: See Table
Heat Treatment: Annealed (Softened)
Heat Treatable: No
Specifications Met: See Table

1/2" Wall Thick. (-1/16" to 1/16" Tolerance)
OD	OD Tolerance	ID	Yield Strength, psi	Fabrication	Hardness	Specifications Met	Straightness Tolerance		1/2 ft. Lg.	1 ft. Lg.	2 ft. Lg.	4 ft. Lg.
3 3/4"	-0.015" to 0.015"	2 3/4"	30,000	Seamless	Not Rated	ASTM A511	0.045" per ft.	00000000	0000000	0000000	0000000	0000000
5/8" Wall Thick. (-0.078" to 0.078" Tolerance)
4"	-0.015" to 0.015"	2 3/4"	30,000	Seamless	Not Rated	ASTM A511	0.045" per ft.	00000000	000000	000000	000000	000000

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 ORDER HISTORY after your order ships.

Round Tubes

Yield Strength:
316 Stainless Steel: 30,000 psi
316/316L Stainless Steel: 25,000 psi
Hardness: Rockwell B80 (Medium)
Heat Treatment: Annealed (Softened)
Heat Treatable: No
Specifications Met: See Table

316 Stainless Steel
OD	OD Tolerance	ID	Fabrication	Max. Temp., °F	Straightness Tolerance	Specifications Met		1/2 ft. Lg.	1 ft. Lg.	2 ft. Lg.	4 ft. Lg.
3/8" Wall Thick. (-0.047" to 0.047" Tolerance)
3 1/2"	-0.031" to 0.031"	2 3/4"	Seamless	1500°	0.045" per 3 ft.	ASTM A511	0000000	0000000	0000000	0000000	0000000
1/2" Wall Thick. (-0.063" to 0.063" Tolerance)
3 3/4"	-0.031" to 0.031"	2 3/4"	Seamless	1500°	0.045" per 3 ft.	ASTM A511	00000000	000000	000000	000000	000000

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.

1/8" Wall Thick.
OD	OD Tolerance	ID	Lengths, ft.	Specifications Met		Per Ft.
3"	-0.020" to 0.020"	2 3/4"	1, 3, 5	ASTM D5436, FDA Compliant 21 CFR 177.1010, UL 94 HB	00000000	000000
1/4" Wall Thick.
3 1/4"	-0.030" to 0.030"	2 3/4"	1, 3, 5	ASTM D5436, FDA Compliant 21 CFR 177.1010, UL 94 HB	00000000	00000

Clear Scratch- and UV-Resistant Acrylic Tubes

Color: Clear
Temperature Range: -40° to 180° F
Tensile Strength; 9,195-11,030 (Good)
Impact Strength: 0.040 ft.-lbs./in.
Hardness: Rockwell M89-M96 (Hard)
For Use Outdoors: Yes
Specifications Met: UL 94 HB

When compared to cast acrylic tubes, these extruded acrylic tubes offer nearly the same performance at a fraction of the cost. Use them for sight gauges and protective covers. This scratch- and UV-resistant 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.

Round Tubes

1/8" Wall Thick.
OD	OD Tolerance	ID	ID Tolerance	Lg., ft.		Each
3"	-0.020" to 0.020"	2 3/4"	-0.020" to 0.020"	6	0000000	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

1/8" Wall Thick. (-0.01" to 0.01")
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 3/4"	-0.020" to 0.020"	FDA Compliant 21 CFR 177.1580, UL 94 HB	0000000	000000	000000	000000	000000	0000000

Clear Easy-to-Form PETG Tubes

Color: Clear
Temperature Range: -40° to 140° F
Tensile Strength: 7,100-7,700 psi (Good)
Impact Strength: 1.7 ft.-lbs./in. (Poor)
Hardness: Rockwell R106-R115 (Hard)
For Use Outdoors: No
Specifications Met: FDA Compliant 21 CFR 177.1315

Form these PETG tubes into containers, packaging, and other complex shapes without sacrificing durability.

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

1/8" Wall Thick.
OD	OD Tolerance	ID	ID Tolerance	Lengths, ft.		Per Ft.
3"	-0.020" to 0.020"	2 3/4"	-0.020" to 0.020"	1, 2, 3, 4, 5, 6	0000000	000000

Slippery UHMW Polyethylene Tubes

These impact- and wear-resistant tubes offer 360° protection from scrapes and strikes to wires, cords, and anything that can slide through them. UHMW has a low-friction surface that resists sticking and binding.

Tubes with an oversized OD also have an undersized ID for finishing to the sizes listed.

Tight-tolerance tubes, also known as bushing stock, slide over rods and inside shafts to increase or decrease the diameter. Their precise sizing allows ascending sizes to fit inside each other to create a thicker wall.

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

Oversized Tubes

Color: White
Temperature Range: -20° to 180° F
Tensile Strength: 4,350-5,800 psi (Poor)
Impact Strength: 16.8 ft.-lbs./in. (Excellent)
Hardness: Durometer 65D-67D (Medium)
For Use Outdoors: No
Specifications Met: ASTM D4020, FDA Compliant 21 CFR 177.1520, UL 94 HB

3/16" Wall Thick.
OD	OD Tolerance	ID	ID Tolerance	Lengths, ft.		Per Ft.
3 1/8"	Not Rated	2 3/4"	Not Rated	1, 2, 3, 4, 5	0000000	000000

Tight-Tolerance Tubes

Color: White
Temperature Range: -20° to 180° F
Tensile Strength: 4,350-5,800 psi (Poor)
Impact Strength: 16.8 ft.-lbs./in. (Excellent)
Hardness: Durometer 65D-67D (Medium)
For Use Outdoors: No
Specifications Met: ASTM D4020

				6" Lg.
OD	OD Tolerance	ID	ID Tolerance		Each
1/4" Wall Thick. (-0.06" to 0")
3 1/4"	-0.030" to 0.000"	2 3/4"	0.000" to 0.030"	0000000	000000

Spark-Resistant Tube Sleeving

A specially formulated silicone rubber coating on this fiberglass sleeving sheds sparks, molten metal splash, hydraulic fuel, and lubricating oil. Exposure to a torch will char the coating, but will not scorch the fiberglass inner layer. It also resists fraying. Because this sleeving is non-expandable, it does not stretch, so it’s best for applications where you know the exact diameter of the items you need to protect.

						Per Ft.
ID	Wall Thick.	Temperature Range, °F	Color	Lengths, ft.		1-49	50-Up
Fiberglass Fabric with Silicone Rubber Coating
2 3/4"	5/32"	-65° to 500°	Orange	1, 5, 10, 25, 50	0000000	000000	000000

Snap-Close Wrap-Around Sleeving

Snaps keep this sleeving securely closed, yet permit quick access to contents and allow you to route wires in between the snaps. Wrap it around wire, cable, and hose without disconnecting them. Made of PVC-coated polyester, it has good chemical resistance.

						Per Ft.
ID	Wall Thick.	Temperature Range, °F	Color	Lengths, ft.		1-99	100-Up
Polyester Plastic with PVC Plastic Coating
2 3/4"	1/64"	0° to 175°	Gray	1, 5, 10, 25, 50	0000000	000000	000000

Multipurpose Flame-Retardant Garolite G-10/FR4 Tubes

Color: Green
Max. Temperature: 265° F
Tensile Strength: 35,000-50,000 psi (Excellent)
Impact Strength: 5.5-12 ft.-lbs./in. (Excellent)
Hardness: Rockwell M110 (Extra Hard)
For Use Outdoors: No
Specifications Met: MIL-I-24768/27, UL 94 V-0

These tubes are Garolite G-10/FR4, a good all-around choice that's strong, machinable, and electrically insulating. They're made of a flame-retardant epoxy resin with fiberglass fabric reinforcement. Garolite G-10/FR4 is also called epoxy-grade industrial laminate and phenolic.

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

1/8" Wall Thick.
OD	OD Tolerance	ID	ID Tolerance	Lg.		Each
3"	-0.008" to 0.008"	2 3/4"	-0.008" to 0.008"	42"	0000000	0000000

Halogen-Free Garolite G-10 Tubes

Color: Yellow
Max. Temperature: 265° F
Tensile Strength: 32,000-40,000 psi (Excellent)
Impact Strength: 5.5-9.5 ft.-lbs./in. (Excellent)
Hardness: Rockwell M100 (Extra Hard)
For Use Outdoors: No
Specifications Met: MIL-I-24768/2, UL 94 HB

These Garolite G-10 tubes can be used in place of Garolite G-10/FR4 tubes for applications that are sensitive to halogen, such as in nuclear plants. They're strong, machinable, and electrically insulating. Made of an epoxy resin with fiberglass fabric reinforcement, Garolite G-10 is also called epoxy-grade industrial laminate and phenolic.

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

1/8" Wall Thick. (-0.031" to 0.031")
OD	ID	Lg.		Each
3"	2 3/4"	48"	00000000	0000000

Ultra-Low-Temperature Garolite G-10 CR Tubes

Color: Green
Temperature Range: -450° to 280° F
Tensile Strength: 40,000 psi (Excellent)
Impact Strength: 7.5-9.5 ft.-lbs./in. (Excellent)
Hardness: Rockwell M110 (Extra Hard)
For Use Outdoors: Yes
Specifications Met: MIL-I-24768/2

Rated for temperatures down to -450° F, this Garolite G-10 CR performs better in cryogenic applications than other glass epoxies. An excellent thermal insulator, it’s often used to transport liquid gases. It also prevents the flow of electrical current. This Garolite keeps its shape without cracking when bent. It has a glass fabric base for strength.

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

				24" Lg.		48" Lg.
OD	OD Tolerance	ID	ID Tolerance		Each		Each
1/8" Wall Thickness
3"	-0.02" to +0.02"	2 3/4"	-0.02" to +0.02"	0000000	0000000	0000000	0000000

Locking Grommets

These grommets snap into place and have wings that expand against the sides of the hole to lock them in position. Use them to protect wire, cable, and cords by turning rough-edged and uneven holes into smooth holes. Made of plastic, these grommets are chemical resistant, and all have an extra-hard rating to withstand high levels of impact.

Grommets that can be used outdoors won't dry out and become brittle when exposed to UV rays.

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

Nylon Plastic
For Hole Dia. (A)	For Material Thick. (B)	ID (C)	Flange Dia. (D)	Overall Ht. (E)	Hardness Rating	Hardness	Temp. Range, °F	For Use Outdoors	Color	Pkg. Qty.		Pkg.
3"	1/32"-1/4"	2 3/4"	3 5/32"	23/32"	Extra Hard	Rockwell R120	0° to 220°	Yes	Black	5	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.

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

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

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

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