Flanged Shaft Collars | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	For Shaft Diameter For Shaft Diameter

	Material Material

Steel

Aluminum

Stainless Steel

	For Shaft Type For Shaft Type

	Keyed
	Round

	Construction Construction

One Piece

Two Piece

	Keyway Width Keyway Width

	OD OD

	Width Width

	Clamping Screw Material Clamping Screw Material

Steel

Stainless Steel

	Flange OD Flange OD

	Mounting Hole Diameter Mounting Hole Diameter

	Number of Mounting Holes Number of Mounting Holes

	Mounting Hole Thread Size Mounting Hole Thread Size

	Flange Thickness Flange Thickness

	Keyway Depth Keyway Depth

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

REACH Compliant

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

RoHS Compliant

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

DFARS Specialty Metals
COTS-Exempt

	Mounting Hole Thread Pitch Mounting Hole Thread Pitch

	Bolt Circle Diameter Bolt Circle Diameter

	Overall Diameter Overall Diameter

	Overall Width Overall Width

3/4"

1 5/8"

2 3/8"

	Clamping Screw Thread Size Clamping Screw Thread Size

108 Products

About Shafts

About Shaft Collars

Shaft collars are useful for holding and positioning components on a shaft. They can also serve as mechanical stops and stroke limiters.

Three tapped counterbored holes and three unthreaded holes provide mounting flexibility. Collars clamp evenly around the shaft to create a strong, mar-free hold. To use, slide onto your shaft and tighten the clamping screws to secure.

Collars with keyway have a standard ANSI keyway for use with keyed shafts, keys, and key stock.

Black-oxide steel collars are stronger than aluminum and stainless steel collars. They have some corrosion resistance. Aluminum collars are lightweight and have good corrosion resistance. 303 stainless steel collars have excellent corrosion resistance.

Optional flange extensions extend the flange OD of the collars to handle larger components. All are machinable and weldable.

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

Inch

			Flange		Keyway		Clamping Screw			Counterbored Mounting Holes		Unthreaded Mounting Holes
For Shaft Dia.	OD	Wd.	OD	Thick.	Wd.	Dp.	Type	No. Included	Mounting Fasteners Included	Thread Size	No. of	Dia.	No. of		Each
Black-Oxide 1117 Carbon Steel
1/4"	13/16"	5/8"	1 15/32"	1/4"	__	__	Socket Head Screw	2	No	4-40	3	1/8"	3	0000000	000000
3/8"	1 1/16"	11/16"	1 23/32"	1/4"	3/32"	1/16"	Socket Head Screw	2	No	6-32	3	5/32"	3	0000000	00000
1/2"	1 1/4"	3/4"	2 7/32"	9/32"	1/8"	1/16"	Socket Head Screw	2	No	8-32	3	5/32"	3	000000	00000
5/8"	1 1/2"	13/16"	2 19/32"	5/16"	3/16"	5/64"	Socket Head Screw	2	No	10-32	3	3/16"	3	000000	00000
3/4"	1 3/4"	1"	2 31/32"	13/32"	3/16"	5/64"	Socket Head Screw	2	No	1/4"-20	3	1/4"	3	000000	00000
1"	2"	1"	3 7/32"	13/32"	1/4"	1/8"	Socket Head Screw	2	No	1/4"-20	3	1/4"	3	000000	00000
1 1/8"	2 1/8"	1"	3 7/32"	13/32"	1/4"	1/8"	Socket Head Screw	2	No	1/4"-20	3	1/4"	3	0000000	00000
1 1/4"	2 1/4"	1"	3 15/32"	13/32"	1/4"	1/8"	Socket Head Screw	2	No	1/4"-20	3	1/4"	3	000000	00000
1 3/8"	2 3/8"	1"	3 19/32"	13/32"	5/16"	5/64"	Socket Head Screw	2	No	1/4"-20	3	1/4"	3	0000000	00000
1 1/2"	2 1/2"	1"	3 23/32"	13/32"	3/8"	5/32"	Socket Head Screw	2	No	1/4"-20	3	1/4"	3	000000	00000
1 3/4"	3"	1 1/4"	4 15/32"	1/2"	3/8"	11/64"	Socket Head Screw	2	No	5/16"-18	3	5/16"	3	0000000	00000
1 15/16"	3 1/4"	1 1/4"	4 23/32"	1/2"	1/2"	7/32"	Socket Head Screw	2	No	5/16"-18	3	5/16"	3	0000000	000000
2"	3 1/4"	1 1/4"	4 23/32"	1/2"	1/2"	7/32"	Socket Head Screw	2	No	5/16"-18	3	5/16"	3	0000000	000000
2 3/16"	3 1/2"	1 1/4"	4 31/32"	1/2"	1/2"	7/32"	Socket Head Screw	2	No	5/16"-18	3	5/16"	3	0000000	000000
2 1/4"	3 1/2"	1 1/4"	4 31/32"	1/2"	1/2"	3/16"	Socket Head Screw	2	No	5/16"-18	3	5/16"	3	0000000	000000
2 7/16"	4"	1 3/8"	5 23/32"	1/2"	5/8"	9/32"	Socket Head Screw	2	No	3/8"-16	3	3/8"	3	0000000	000000
2 1/2"	4"	1 3/8"	5 23/32"	1/2"	5/8"	9/32"	Socket Head Screw	2	No	3/8"-16	3	3/8"	3	0000000	000000
3"	4 1/2"	1 3/8"	6 11/32"	1/2"	3/4"	11/32"	Socket Head Screw	2	No	3/8"-16	3	3/8"	3	0000000	000000
2024 Aluminum
1/4"	13/16"	5/8"	1 15/32"	1/4"	__	__	Socket Head Screw	2	No	4-40	3	1/8"	3	0000000	00000
3/8"	1 1/16"	11/16"	1 23/32"	1/4"	3/32"	1/16"	Socket Head Screw	2	No	6-32	3	5/32"	3	0000000	00000
1/2"	1 1/4"	3/4"	2 7/32"	9/32"	1/8"	1/16"	Socket Head Screw	2	No	8-32	3	5/32"	3	0000000	00000
5/8"	1 1/2"	13/16"	2 19/32"	5/16"	3/16"	5/64"	Socket Head Screw	2	No	10-32	3	3/16"	3	0000000	00000
3/4"	1 3/4"	1"	2 31/32"	13/32"	3/16"	5/64"	Socket Head Screw	2	No	1/4"-20	3	1/4"	3	0000000	00000
1"	2"	1"	3 7/32"	13/32"	1/4"	1/8"	Socket Head Screw	2	No	1/4"-20	3	1/4"	3	0000000	00000
1 1/8"	2 1/8"	1"	3 7/32"	13/32"	1/4"	1/8"	Socket Head Screw	2	No	1/4"-20	3	1/4"	3	0000000	00000
1 1/4"	2 1/4"	1"	3 15/32"	13/32"	1/4"	1/8"	Socket Head Screw	2	No	1/4"-20	3	1/4"	3	0000000	000000
1 3/8"	2 3/8"	1"	3 19/32"	13/32"	5/16"	5/64"	Socket Head Screw	2	No	1/4"-20	3	1/4"	3	0000000	000000
1 1/2"	2 1/2"	1"	3 23/32"	13/32"	3/8"	5/32"	Socket Head Screw	2	No	1/4"-20	3	1/4"	3	0000000	000000
1 3/4"	3"	1 1/4"	4 15/32"	1/2"	3/8"	11/64"	Socket Head Screw	2	No	5/16"-18	3	5/16"	3	0000000	000000
1 15/16"	3 1/4"	1 1/4"	4 23/32"	1/2"	1/2"	7/32"	Socket Head Screw	2	No	5/16"-18	3	5/16"	3	0000000	000000
2"	3 1/4"	1 1/4"	4 23/32"	1/2"	1/2"	7/32"	Socket Head Screw	2	No	5/16"-18	3	5/16"	3	0000000	000000
2 3/16"	3 1/2"	1 1/4"	4 31/32"	1/2"	1/2"	7/32"	Socket Head Screw	2	No	5/16"-18	3	5/16"	3	0000000	000000
2 1/4"	3 1/2"	1 1/4"	4 31/32"	1/2"	1/2"	3/16"	Socket Head Screw	2	No	5/16"-18	3	5/16"	3	0000000	000000
2 7/16"	4"	1 3/8"	5 23/32"	1/2"	5/8"	9/32"	Socket Head Screw	2	No	3/8"-16	3	3/8"	3	0000000	000000
2 1/2"	4"	1 3/8"	5 23/32"	1/2"	5/8"	9/32"	Socket Head Screw	2	No	3/8"-16	3	3/8"	3	0000000	000000
3"	4 1/2"	1 3/8"	6 11/32"	1/2"	3/4"	11/32"	Socket Head Screw	2	No	3/8"-16	3	3/8"	3	0000000	000000
303 Stainless Steel
1/4"	13/16"	5/8"	1 15/32"	1/4"	__	__	Socket Head Screw	2	No	4-40	3	1/8"	3	0000000	00000
3/8"	1 1/16"	11/16"	1 23/32"	1/4"	3/32"	1/16"	Socket Head Screw	2	No	6-32	3	5/32"	3	0000000	00000
1/2"	1 1/4"	3/4"	2 7/32"	9/32"	1/8"	1/16"	Socket Head Screw	2	No	8-32	3	5/32"	3	0000000	00000
5/8"	1 1/2"	13/16"	2 19/32"	5/16"	3/16"	5/64"	Socket Head Screw	2	No	10-32	3	3/16"	3	0000000	000000
3/4"	1 3/4"	1"	2 31/32"	13/32"	3/16"	5/64"	Socket Head Screw	2	No	1/4"-20	3	1/4"	3	0000000	000000
1"	2"	1"	3 7/32"	13/32"	1/4"	1/8"	Socket Head Screw	2	No	1/4"-20	3	1/4"	3	0000000	000000
1 1/8"	2 1/8"	1"	3 7/32"	13/32"	1/4"	1/8"	Socket Head Screw	2	No	1/4"-20	3	1/4"	3	0000000	000000
1 1/4"	2 1/4"	1"	3 15/32"	13/32"	1/4"	1/8"	Socket Head Screw	2	No	1/4"-20	3	1/4"	3	0000000	000000
1 3/8"	2 3/8"	1"	3 19/32"	13/32"	5/16"	5/64"	Socket Head Screw	2	No	1/4"-20	3	1/4"	3	0000000	000000
1 1/2"	2 1/2"	1"	3 23/32"	13/32"	3/8"	5/32"	Socket Head Screw	2	No	1/4"-20	3	1/4"	3	0000000	000000
1 3/4"	3"	1 1/4"	4 15/32"	1/2"	3/8"	11/64"	Socket Head Screw	2	No	5/16"-18	3	5/16"	3	0000000	000000
1 15/16"	3 1/4"	1 1/4"	4 23/32"	1/2"	1/2"	7/32"	Socket Head Screw	2	No	5/16"-18	3	5/16"	3	0000000	000000
2"	3 1/4"	1 1/4"	4 23/32"	1/2"	1/2"	7/32"	Socket Head Screw	2	No	5/16"-18	3	5/16"	3	0000000	000000
2 3/16"	3 1/2"	1 1/4"	4 31/32"	1/2"	1/2"	7/32"	Socket Head Screw	2	No	5/16"-18	3	5/16"	3	0000000	000000
2 1/4"	3 1/2"	1 1/4"	4 31/32"	1/2"	1/2"	3/16"	Socket Head Screw	2	No	5/16"-18	3	5/16"	3	0000000	000000
2 7/16"	4"	1 3/8"	5 23/32"	1/2"	5/8"	9/32"	Socket Head Screw	2	No	3/8"-16	3	3/8"	3	0000000	000000
2 1/2"	4"	1 3/8"	5 23/32"	1/2"	5/8"	9/32"	Socket Head Screw	2	No	3/8"-16	3	3/8"	3	0000000	000000
3"	4 1/2"	1 3/8"	6 11/32"	1/2"	3/4"	11/32"	Socket Head Screw	2	No	3/8"-16	3	3/8"	3	0000000	000000

Metric

			Flange		Keyway		Clamping Screw			Counterbored Mounting Holes			Unthreaded Mounting Holes
For Shaft Dia., mm	OD, mm	Wd., mm	OD, mm	Thick., mm	Wd., mm	Dp., mm	Type	No. Included	Mounting Fasteners Included	Thread Size	Thread Pitch, mm	No. of	Dia., mm	No. of		Each
Black-Oxide 1117 Carbon Steel
6	16	19	38	6.9	__	__	Socket Head Screw	2	No	M3	0.5	3	3	3	0000000	000000
8	18	19	41	6.9	2	1	Socket Head Screw	2	No	M3	0.5	3	3	3	0000000	00000
10	24	19	45	6.9	3	1.4	Socket Head Screw	2	No	M3	0.5	3	3	3	0000000	00000
12	28	19	55	6.9	4	1.8	Socket Head Screw	2	No	M4	0.7	3	4	3	0000000	00000
16	34	20.6	63	6.9	5	2.3	Socket Head Screw	2	No	M5	0.8	3	5.4	3	0000000	00000
18	36	20.64	63	6.85	6	2.8	Socket Head Screw	2	No	M5	0.8	3	5.4	3	0000000	00000
20	40	25.4	69	7.9	6	2.8	Socket Head Screw	2	No	M6	1	3	6	3	0000000	00000
25	45	25.4	75	7.9	8	3.3	Socket Head Screw	2	No	M6	1	3	6	3	0000000	00000
30	54	25.4	82	7.9	8	3.3	Socket Head Screw	2	No	M6	1	3	6	3	0000000	00000
35	57	25.4	88	7.9	10	3.3	Socket Head Screw	2	No	M6	1	3	6	3	0000000	00000
40	60	25.4	92	7.9	12	3.3	Socket Head Screw	2	No	M6	1	3	6	3	0000000	000000
45	73	32	107	13	14	3.8	Socket Head Screw	2	No	M6	1	3	8.4	3	0000000	000000
50	78	31.75	114	12.7	14	3.8	Socket Head Screw	2	No	M8	1.25	3	8.4	3	0000000	000000
2024 Aluminum
6	16	19	38	6.9	__	__	Socket Head Screw	2	No	M3	0.5	3	3	3	0000000	00000
8	18	19	41	6.9	2	1	Socket Head Screw	2	No	M3	0.5	3	3	3	0000000	00000
10	24	19	45	6.9	3	1.4	Socket Head Screw	2	No	M3	0.5	3	3	3	0000000	00000
12	28	19	55	6.9	4	1.8	Socket Head Screw	2	No	M4	0.7	3	4	3	0000000	00000
16	34	20.6	63	6.9	5	2.3	Socket Head Screw	2	No	M5	0.8	3	5	3	0000000	00000
18	36	20.64	63	6.85	6	2.8	Socket Head Screw	2	No	M5	0.8	3	5	3	0000000	00000
20	40	25.4	69	7.9	6	2.8	Socket Head Screw	2	No	M6	1	3	6	3	0000000	00000
25	45	25.4	75	7.9	8	3.3	Socket Head Screw	2	No	M6	1	3	6	3	0000000	00000
30	54	25.4	82	7.9	8	3.3	Socket Head Screw	2	No	M6	1	3	6	3	0000000	000000
35	57	25.4	88	7.9	10	3.3	Socket Head Screw	2	No	M6	1	3	6	3	0000000	000000
40	60	25.4	92	7.9	12	3.3	Socket Head Screw	2	No	M6	1	3	6	3	0000000	000000
45	73	32	107	13	14	3.8	Socket Head Screw	2	No	M6	1	3	8.4	3	0000000	000000
50	78	31.75	114	12.7	14	3.8	Socket Head Screw	2	No	M8	1.25	3	8	3	0000000	000000
303 Stainless Steel
6	16	19	38	6.9	__	__	Socket Head Screw	2	No	M3	0.5	3	3	3	0000000	00000
8	18	19	41	6.9	2	1	Socket Head Screw	2	No	M3	0.5	3	3	3	0000000	00000
10	24	19	45	6.9	3	1.4	Socket Head Screw	2	No	M3	0.5	3	3	3	0000000	00000
12	28	19	55	6.9	4	1.8	Socket Head Screw	2	No	M4	0.7	3	4	3	0000000	00000
16	34	20.6	63	6.9	5	2.3	Socket Head Screw	2	No	M5	0.8	3	5.4	3	0000000	00000
18	36	20.64	63	6.85	6	2.8	Socket Head Screw	2	No	M5	0.8	3	5.4	3	0000000	000000
20	40	25.4	69	7.9	6	2.8	Socket Head Screw	2	No	M6	1	3	6	3	0000000	000000
25	45	25.4	75	7.9	8	3.3	Socket Head Screw	2	No	M6	1	3	6	3	0000000	000000
30	54	25.4	82	7.9	8	3.3	Socket Head Screw	2	No	M6	1	3	6	3	0000000	000000
35	57	25.4	88	7.9	10	3.3	Socket Head Screw	2	No	M6	1	3	6	3	0000000	000000
40	60	25.4	92	7.9	12	3.3	Socket Head Screw	2	No	M6	1	3	6	3	0000000	000000
45	73	32	107	13	14	3.8	Socket Head Screw	2	No	M6	1	3	8.4	3	0000000	000000
50	78	31.75	114	12.7	14	3.8	Socket Head Screw	2	No	M8	1.25	3	8.4	3	0000000	000000

Optional Flange Extensions

	Flange
For Shaft Dia.	OD	Thick.	Mounting Fasteners Included		Each
1018 Carbon Steel
1/2"	3 1/4"	3/8"	Yes	0000000	000000
5/8"	3 5/8"	3/8"	Yes	0000000	00000
3/4"	4"	3/8"	Yes	0000000	00000
1"	4 1/4"	3/8"	Yes	0000000	00000
1 1/4"	4 1/2"	3/8"	Yes	0000000	00000
1 1/2"	4 3/4"	3/8"	Yes	0000000	00000

Easy-Access Flange-Mounted Shaft Supports

A removable collar allows access to the shaft without unbolting the flange. For use with light to medium loads where shaft alignment is not critical, these carbon steel supports allow you to hold linear shafts perpendicular to the mounting surface. Secure the shaft by tightening the clamping screw.

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

	Overall				Mounting Hole
For Shaft Dia.	Dia.	Wd.	Flange Thick.	Bolt Circle Dia.	No. of	Dia.	Clamping Screw Thread Size		Each
Inch—1117 Carbon Steel
1/4"	1 5/8"	3/4"	1/4"	1 11/32"	4	0.15"	6-32	000000	000000
3/8"	1 5/8"	3/4"	1/4"	1 11/32"	4	0.15"	6-32	000000	00000
1/2"	2 1/4"	1"	5/16"	1 3/4"	4	0.177"	8-32	000000	00000
5/8"	2 5/8"	1"	5/16"	2 1/8"	4	0.201"	10-32	000000	00000
3/4"	3"	1"	5/16"	2 3/8"	4	0.266"	1/4"-28	000000	00000
1"	3 1/4"	1 5/8"	3/8"	2 3/4"	4	0.266"	1/4"-28	000000	00000
1 1/4"	3 1/2"	1 5/8"	3/8"	3"	4	0.266"	1/4"-28	000000	00000
1 1/2"	3 3/4"	2"	13/32"	3 1/4"	4	0.266"	1/4"-28	000000	00000
2"	4 1/2"	2 3/8"	1/2"	3 7/8"	4	0.328"	5/16"-24	000000	000000

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About Shafts

About Shaft Collars

Flange-Mount Shaft Collars

Easy-Access Flange-Mounted Shaft Supports