Flanged Collars | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	For Shaft Diameter For Shaft Diameter

	Material Material

	For Shaft Type For Shaft Type

	Keyed
	Round

	Keyway Width Keyway Width

	OD OD

	Width Width

	Clamping Screw Material Clamping Screw Material

Steel

Stainless Steel

	Duct Size Duct Size

3
3 1/2
4
4 1/2
5
5 1/2
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
32
34
36
38
40
42
44
46
48
52

	Number of Mounting Holes Number of Mounting Holes

	Flange OD Flange OD

	Mounting Hole Diameter Mounting Hole Diameter

	Flange Thickness Flange Thickness

	Mounting Hole Thread Size Mounting Hole Thread Size

	Keyway Depth Keyway Depth

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

DFARS Specialty Metals
COTS-Exempt

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

RoHS Compliant

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

REACH Compliant

	Finish Finish

Black Oxide

Galvanized

	Flange Mount Type Flange Mount Type

Screw On

Weld On

	Connection Type Connection Type


Press Fit	Interlocking Bracket

	Component Component

284 Products

Flange-Mount Shaft Collars

Three tapped counterbored holes and three through-holes provide mounting flexibility.

Duct and Fittings

Duct Flanges

Bolt flanges to equipment to start a run of duct.

Weld-On Duct Flanges

Weld flanges to equipment to start a run of duct.

Standard Duct and Fittings

No need for clamps or connectors—duct and fittings have a male end that is slightly smaller than its female end for simple assembly.

Rectangular Duct and Fittings

Often used in tight spaces, such as in walls and ceilings, rectangular duct allows you to select larger sizes without increasing duct height.

Snap-On Collars for Drop-Ceiling Diffusers

Connect diffusers to duct.