Round Flanges | McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	ID ID

	OD OD

	Shape Shape	Show

	Round

	Shape Shape	Hide


Straight	Cap/Plug

Ring with Bolt Holes	Ring

Round	90° Elbow

Tee	45° Elbow

Tapered Round	Tapered Rectangle

Cross	Cap

Rectangle	Made to Order

Flat	Disc

Square

	Material Material

Brass

Fabric

Rubber

	End Style End Style

Flange

Cuff

	Extended Length Extended Length

	Outlet Box Component Outlet Box Component

Carpet Flange

Cover

	Diameter Diameter

3 7/8"

5 1/4"

	Flexibility Flexibility

	Flexible

	Travel Length Travel Length

	Maximum Temperature Maximum Temperature

Less than 250° F

250° to 499° F

500° to 749° F

	Minimum Temperature Minimum Temperature

-99° to 0° F

	Color Color

	Black		White
	Gray		Orange

	Protects Against Protects Against

	For Hole Diameter For Hole Diameter

	Material Thickness Material Thickness

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

DFARS Specialty Metals
COTS-Exempt

	Retracted Length Retracted Length

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

RoHS Compliant

	Required ID Clearance Required ID Clearance

1/4"

3/8"

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

REACH Compliant

	Construction Construction

Molded

Sewn

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309 Products

Building and Machinery Hardware

Round Bellows with Cuff End and Flange End

Attach the cuff end with a hose clamp and screw mount the flange end.

Create-Your-Own Round Bellows with Flange Ends

Interlock bellows, mounting flanges, and links to create a custom-length bellows. These molded bellows are airtight to keep contaminants out.

Breathable Wraparound Round
Bellows with Flange Ends

No need to disassemble equipment—these bellows wrap around moving parts. Sewn seams let them breathe, so they retract quickly in fast-cycling applications.

Wear-Resistant Breathable
Round Bellows with Flange Ends

Made of Kevlar, these are the most durable breathable round bellows with flange ends. They also protect against sparks and weld spatter.

Breathable Round Bellows with Flange Ends

High-Temperature Breathable
Round Bellows with Flange Ends

These fiberglass bellows withstand temperatures up to 450° F—about twice as much as standard breathable round bellows with flange ends. They also protect against flames and sparks.