3 5/16" Tubing | McMaster-Carr

Filter by

System of Measurement

Flexibility

Maximum Temperature

Color

For Use With

Material

Spiral Material

Inside Surface Texture

Bend Radius

Environment

Maximum Vacuum @ Temperature

Minimum Temperature

Maximum Continuous Length

Clamp Type

Wear Strip Included

Maximum Pressure @ Temperature

Material Thickness

Length

Fitting Connection

RoHS Compliance

Compresses To

Forward

How can we improve?

19 Products

About Duct Hose

About Hose

Temperature Range: -40° to 240° F
Maximum Vacuum: 29" of Hg @ 72° F
Material: Chlorobutyl rubber with an EPDM rubber cover
Color: Gray
Compatible Hose Fittings: Cam-and-Groove

Strengthened with yarn, this hose handles high-pressure vacuum and suction without getting kinked or crushed. Also called brewer's and vintner's hose, it's FDA compliant and 3-A certified, so it's safe to use with wet food and drinks. However, you shouldn't use it with oily food. It's made of chlorobutyl, which means it stands up to frequent hot water and chemical cleanings. Since it's interior is smooth, food won't get caught or build up inside the hose. This hose has an EPDM cover that won't tear, so you can drag it across shop floors. It's not for continuous steam service.

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

						Per Ft.
ID	OD	Bend Radius	Specifications Met	Max. Continuous Lg., ft.		1-99	100-Up
250 psi @ 72° F Max. Pressure
2 1/2"	3 5/16"	13"	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600	100	000000000	000000	000000

High-Pressure Wet-Food and Beverage Hose with Quick-Clamp Sanitary Fittings

Temperature Range: -40° to 240° F
Maximum Vacuum: 29" of Hg @ 72° F
Maximum Pressure: 250 psi @ 72° F
Material: Chlorobutyl Rubber with EPDM Rubber Cover
Color: Gray
Specifications Met: 3-A Certified 18-03, 3-A Certified 62-02, FDA Compliant 21 CFR 177.2600

Transport wet food and drink at high pressures with a hose connected by sanitary fittings. The hose is strengthened with yarn to handle high-pressure vacuum and suction without getting kinked or crushed. Also known as brewer's and vintner's hose, it's FDA compliant and 3-A certified. The fittings are also 3-A certified, so it's safe for use with food. However, you shouldn't use it with oily substances. The hose and fittings stand up to frequent hot water and chemical cleanings. Since it's interior is smooth, food won't get caught or build up inside the hose. It has an EPDM cover that won't tear, so you can drag it across shop floors. It's not for continuous steam service.

The fittings are also called tri-clamp fittings. They attach to other quick-clamp fittings with a gasket and a clamp.

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

316 Stainless Steel Quick-Clamp Sanitary × 316 Stainless Steel Quick-Clamp Sanitary
Flange OD	ID	OD	Bend Radius		5 ft.	10 ft.	15 ft.	20 ft.	25 ft.
3.047" × 3.047"	2 1/2"	3 5/16"	13"	000000000	000000000	000000000	000000000	000000000	000000000

High-Vacuum Hose with Claw-Clamp Fittings

More flexible than rigid stainless steel tubing, this hose allows you to link high-vacuum components that are misaligned. Also known as bellows. The ribbed design absorbs vibration so it doesn't transfer from one component to the next. Equipped with a claw-clamp (ISO-K) fitting on each end, this hose connects to large components with fittings starting at trade number 63. Each fitting on the hose requires four claw clamps and a ring (both sold separately) to connect. Not for use in pressure applications.

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.

Hose

Temperature Range: Not Rated
Material:
6" Lengths: 321 Stainless Steel
Other Lengths: 304 Stainless Steel
Fitting Material: 304 Stainless Steel

6" Lg.
For Tube OD	Flange OD	High-Vacuum Flange Size	ID	OD	Wall Thickness	Bend Radius	High Vacuum Connection Type	Max. Vacuum		Each
2 1/2"	3.74"	63	2 1/2"	3 5/16"	0.008"	2 3/4"	ISO-K	1 × 10 ^-9 torr @ 72° F	0000000	0000000

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	Max. Vacuum		Each
2 1/2", 3", 4"	3.74", 4.33", 5.12"	63, 80, 100	ISO-K	Aluminum	1 × 10 ^-9 torr @ 72° F	0000000	00000
Single Claw
2 1/2", 3", 4"	3.74", 4.33", 5.12"	63, 80, 100	ISO-K	Aluminum	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

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.

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.
0.026" Material Thick.
3"	3 5/16"	12"	Ribbed	0000000	000000	000000	000000	0000000	0000000	0000000	0000000	0000000	0000000

Flexible Duct Hose with Wear Strip for Corrosive Fumes

PFA Hose

Flexible
Compatible Clamps: Worm-Drive Clamps
Color: Gray or Clear; Wear Strip is Silver
Temperature Range: -65° to 500° F

Not only does this hose stand up to corrosive fumes, it has a metal spiral on the outside that acts as a wear strip to protect against damage.

PFA plastic hose is clear so you can see inside your line. It meets UL 94 V-0 for flame retardance. Use with smoke, paint fumes, sodium hydroxide fumes, and sulfuric acid fumes.

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

								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.		1-24	25-Up
Clear PFA Plastic
3"	3 5/16"	4 1/2"	20%	3 in. of Hg @ 72° F	7 psi @ 72° F	0.005"	Ribbed	Left Hand	Metal	UL 94 V-0	25	00000000	000000	000000

Extreme-Temperature Flexible Duct Hose with Wear Strip for Fumes

Flexible
Compatible Clamps: Worm-Drive Clamps
Color: Gray; Wear Strip is Silver
Temperature Range: -100° to 800° F

Glass fabric withstands extreme temperatures like stainless steel, but is much more flexible. Hose has a metal spiral that acts as a wear strip to protect against damage. Hose is for use with smoke and water-based paint fumes.

								Spiral				Per Ft.
ID	OD	Bend Radius	Compresses To	Max. Vacuum	Max. Pressure	Material Thick.	Interior Surface Texture	Direction	Material	Max. Continuous Lg., ft.		1-24	25-Up
Alumina-Coated Glass Fabric
3"	3 5/16"	4 1/2"	25%	4 in. of Hg @ 72° F	6.8 psi @ 72° F	0.02"	Ribbed	Left Hand	Metal	25	00000000	000000	000000

Blo-R-Vac Flexible Duct Hose for Dust

Black Hose

White Hose

Flexible
Compatible Clamps: Worm-Drive Clamps
Color: Black, White, or Blue
Temperature Range: -40° to 250° F

A good general purpose hose for blowing and vacuum applications, this hose is for use with grinding dust, sawdust, and lint.

TPR rubber hose meets UL 94 HB for flame retardance.

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

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

								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.		1-24	25-Up
Inch
Black TPR Rubber
3"	3 5/16"	4 1/2"	50%	28 in. of Hg @ 72° F	10 psi @ 72° F	0.03"	Ribbed	Left Hand	Metal	UL 94 HB	25	00000000	00000	00000
White TPR Rubber
3"	3 5/16"	4 1/2"	50%	28 in. of Hg @ 72° F	10 psi @ 72° F	0.03"	Ribbed	Left Hand	Metal	UL 94 HB	25	000000000	0000	0000

Flexible Duct Hose for Clean Environments

Flexible
Compatible Clamps: Worm-Drive Clamps
Color: White
Temperature Range: -20° to 325° F

This white hose makes dirt and other contaminants easy to spot. Hose is for use with lint, dust, and sawdust and can also be used in food industry or pharmaceutical applications.

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	Max. Continuous Lg., ft.		1-24	25-Up
Acrylic-Coated Polyester
3"	3 5/16"	2 1/2"	25%	29 in. of Hg @ 72° F	29 psi @ 72° F	0.03"	Ribbed	Right Hand	Metal	25	0000000	000000	000000

Very Flexible Duct Hose for Dust

Black Hose

Very Flexible
Compatible Clamps: Worm-Drive Clamps
Color: Clear or Black
Temperature Range: Clear: -20° to 180° F; Black: -40° to 250° F

The small bend radius makes this hose easy to wrap around corners and install in tight spaces. It is for use with lint, dust, and sawdust.

Black hose meets UL 94 V-0 for flame retardance.

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.		1-24	25-Up
Black Neoprene-Coated Polyester
3"	3 5/16"	1 1/2"	25%	29 in. of Hg @ 72° F	30 psi @ 72° F	0.03"	Ribbed	Right Hand	Metal	UL 94 V-0	25	0000000	000000	00000

Static-Control Very Flexible Duct Hose for Dust

Very Flexible
Compatible Clamps: Worm-Drive Clamps
Color: Black
Specifications Met: UL 94 V-0
Temperature Range: -40° to 250° F

The neoprene coating on this hose contains carbon to dissipate static when hose is installed in a grounded system. Hose is for use with lint, dust, and sawdust. It meets UL 94 V-0 for flame retardance.

								Spiral					Per Ft.
ID	OD	Bend Radius	Compresses To	Max. Vacuum	Max. Pressure	Material Thick.	Interior Surface Texture	Direction	Material	Surface Resistivity, ohms/sq.	Max. Continuous Lg., ft.		1-49	50-Up
Neoprene-Coated Polyester
3"	3 5/16"	2 1/2"	35%	29 in. of Hg @ 72° F	29 psi @ 72° F	0.03"	Ribbed	Right Hand	Metal	10³	50	0000000	000000	000000

Continuous-Flex Duct Hose for Wood Chips and Plastic Pellets

Flexible
Compatible Clamps: Worm-Drive and Quick-Release Clamps
Color: Black
Temperature Range: -40° to 250° F

The neoprene coating on this hose withstands continuous motion without weakening. Hose is also for use with cardboard fibers. It meets UL 94 V-0 for flame retardance.

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.		1-24	25-Up
Neoprene-Coated Nylon
3"	3 5/16"	1"	25%	29 in. of Hg @ 72° F	30 psi @ 72° F	0.026"	Ribbed	Right Hand	Metal	UL 94 V-0	25	0000000	000000	000000

Flame-Resistant Duct Hose for Wood Chips and Plastic Pellets

Flexible
Compatible Clamps: Worm-Drive Clamps
Color: Semi-Clear White
Temperature Range: -65° to 225° F

Hose meets UL 94 V-2 for flame retardance. The walls are semi-clear so you get a glimpse of what’s running through your line. Hose is also for use with cardboard fibers.

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

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

								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.		1-24	25-Up
Polyurethane
3"	3 5/16"	3"	35%	29 in. of Hg @ 72° F	29 psi @ 72° F	0.03"	Ribbed	Right Hand	Metal	UL 94 V-2	50	000000	000000	000000

Puncture- and Abrasion-Resistant Duct Hose for Metal Chips and Shavings

Clear Hose

Black Hose

Flexible
Compatible Clamps: Worm-Drive Clamps
Color: Clear or Black
Temperature Range: -65° to 200° F

Blow jagged, abrasive materials through this hose without worrying about punctures or tears. It's made of extra-thick polyurethane.

Clear hose lets you monitor flow.

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	Max. Continuous Lg., ft.		1-24	25-Up
Clear Polyurethane
3"	3 5/16"	5"	75%	29 in. of Hg @ 72° F	30 psi @ 72° F	0.06"	Ribbed	Left Hand	Metal	25	0000000	000000	000000
Black Polyurethane
3"	3 5/16"	3"	30%	29 in. of Hg @ 72° F	29 psi @ 72° F	0.03"	Ribbed	Right Hand	Metal	25	00000000	00000	00000

Antistatic Duct Hose for Dry Food

Flexible
Compatible Clamps: Worm-Drive Clamps
Color: Clear
Temperature Range: -20° to 200° F

Blow grain, sugar, flour, and powders through this hose—it's made of FDA listed materials. Hose has a metal spiral that dissipates static when used in a grounded system. The walls are clear so you can monitor flow.

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

								Spiral						Per Ft.
ID	OD	Bend Radius	Compresses To	Max. Vacuum	Max. Pressure	Material Thick.	Interior Surface Texture	Direction	Material	Specifications Met	Surface Resistivity	Max. Continuous Lg., ft.		1-49	50-Up
Polyurethane
3"	3 5/16"	3 1/2"	50%	29 in. of Hg @ 72° F	12 psi @ 72° F	0.035"	Ribbed	Right Hand	Metal	FDA Compliant 21 CFR 177.2600	2 × 10¹⁰ ohms/sq.	50	000000	000000	000000