Flanged Shaft Collars | McMaster-Carr

Use the tapped and unthreaded holes on the flange to mount components as needed. To install, slide these collars from one end of your shaft and tighten the clamping screws. The collars grip firmly and evenly without marring the shaft, so you can reposition or remove them later. Collars with keyways have a standard ANSI keyway to lock in place shafts, keys, and key stock.

Black-Oxide Carbon Steel—Dark and matted for a finished look, but with minimal corrosion resistance. Best for dry environments.

303 Stainless Steel—Withstand moisture and mild cleaning solutions, such as acetone and ammonia. These are easier to machine than other stainless steel collars.

Aluminum—One-third the weight of steel and corrosion resistant.

				Flange		Keyway			Clamping Screw			Mounting Holes		Unthreaded Mounting Holes
	For Shaft Dia.	OD	Wd.	OD	Thk.	Wd.	Dp.	For Shaft Type	Type	No. Included	Mounting Fasteners Included	Thread Size	No. of	Dia.	No. of		Each
Black-Oxide Carbon Steel



		1/4"	13/16"	5/8"	1 15/32"	1/4"	—	—	Round	Socket Head	2	No	4-40	3	1/8"	3	9684T27	000000


		3/8"	1 1/16"	11/16"	1 23/32"	1/4"	3/32"	1/16"	Keyed	Socket Head	2	No	6-32	3	5/32"	3	9684T28	00000
		1/2"	1 1/4"	3/4"	2 7/32"	9/32"	1/8"	1/16"	Keyed	Socket Head	2	No	8-32	3	5/32"	3	9684T1	00000
		5/8"	1 1/2"	13/16"	2 19/32"	5/16"	3/16"	5/64"	Keyed	Socket Head	2	No	10-24	3	3/16"	3	9684T2	00000
		3/4"	1 3/4"	1"	2 31/32"	13/32"	3/16"	3/32"	Keyed	Socket Head	2	No	1/4"-20	3	1/4"	3	9684T3	000000
		1"	2"	1"	3 7/32"	13/32"	1/4"	1/8"	Keyed	Socket Head	2	No	1/4"-20	3	1/4"	3	9684T4	000000
		1 1/8"	2 1/8"	1"	3 7/32"	13/32"	1/4"	1/8"	Keyed	Socket Head	2	No	1/4"-20	3	1/4"	3	9684T29	000000
		1 1/4"	2 1/4"	1"	3 15/32"	13/32"	1/4"	1/8"	Keyed	Socket Head	2	No	1/4"-20	3	1/4"	3	9684T5	000000
		1 3/8"	2 3/8"	1"	3 19/32"	13/32"	5/16"	9/64"	Keyed	Socket Head	2	No	1/4"-20	3	1/4"	3	9684T31	000000
		1 1/2"	2 1/2"	1"	3 23/32"	13/32"	3/8"	11/64"	Keyed	Socket Head	2	No	1/4"-20	3	1/4"	3	9684T6	000000
		1 3/4"	3"	1 1/4"	4 15/32"	1/2"	3/8"	11/64"	Keyed	Socket Head	2	No	5/16"-18	3	5/16"	3	9684T32	000000


		1 15/16"	3 1/4"	1 1/4"	4 23/32"	1/2"	1/2"	7/32"	Keyed	Socket Head	2	No	5/16"-18	3	5/16"	3	9684T33	000000
		2"	3 1/4"	1 1/4"	4 23/32"	1/2"	1/2"	7/32"	Keyed	Socket Head	2	No	5/16"-18	3	5/16"	3	9684T34	000000
		2 3/16"	3 1/2"	1 1/4"	4 31/32"	1/2"	1/2"	7/32"	Keyed	Socket Head	2	No	5/16"-18	3	5/16"	3	9684T35	000000
		2 1/4"	3 1/2"	1 1/4"	4 31/32"	1/2"	1/2"	15/64"	Keyed	Socket Head	2	No	5/16"-18	3	5/16"	3	9684T36	000000
		2 7/16"	4"	1 3/8"	5 23/32"	1/2"	5/8"	9/32"	Keyed	Socket Head	2	No	3/8"-16	3	3/8"	3	9684T37	000000
		2 1/2"	4"	1 3/8"	5 23/32"	1/2"	5/8"	9/32"	Keyed	Socket Head	2	No	3/8"-16	3	3/8"	3	9684T38	000000
		3"	4 1/2"	1 3/8"	6 11/32"	1/2"	3/4"	21/64"	Keyed	Socket Head	2	No	3/8"-16	3	3/8"	3	9684T39	000000
		6 mm	16 mm	19 mm	38 mm	6.9 mm	—	—	Round	Socket Head	2	No	M3 × 0.5 mm	3	3 mm	3	9604T11	00000
		8 mm	18 mm	19 mm	41 mm	6.9 mm	2 mm	1 mm	Keyed	Socket Head	2	No	M3 × 0.5 mm	3	3 mm	3	9604T12	00000
		10 mm	24 mm	19 mm	45 mm	6.9 mm	3 mm	1.4 mm	Keyed	Socket Head	2	No	M3 × 0.5 mm	3	3 mm	3	9604T13	00000


		12 mm	28 mm	19 mm	55 mm	6.9 mm	4 mm	1.8 mm	Keyed	Socket Head	2	No	M4 × 0.7 mm	3	4 mm	3	9604T14	00000
		16 mm	34 mm	20.6 mm	63 mm	6.9 mm	5 mm	2.3 mm	Keyed	Socket Head	2	No	M5 × 0.8 mm	3	5.4 mm	3	9604T15	00000
		18 mm	36 mm	20.64 mm	63 mm	6.85 mm	6 mm	2.8 mm	Keyed	Socket Head	2	No	M5 × 0.8 mm	3	5.4 mm	3	9604T16	000000
		20 mm	40 mm	25.4 mm	69 mm	7.9 mm	6 mm	2.8 mm	Keyed	Socket Head	2	No	M6 × 1 mm	3	6 mm	3	9604T17	00000
		25 mm	45 mm	25.4 mm	75 mm	7.9 mm	8 mm	3.3 mm	Keyed	Socket Head	2	No	M6 × 1 mm	3	6 mm	3	9604T18	00000
		30 mm	54 mm	25.4 mm	82 mm	7.9 mm	8 mm	3.3 mm	Keyed	Socket Head	2	No	M6 × 1 mm	3	6 mm	3	9604T19	000000
		35 mm	57 mm	25.4 mm	88 mm	7.9 mm	10 mm	3.3 mm	Keyed	Socket Head	2	No	M6 × 1 mm	3	6 mm	3	9604T21	000000
		40 mm	60 mm	25.4 mm	92 mm	7.9 mm	12 mm	3.3 mm	Keyed	Socket Head	2	No	M6 × 1 mm	3	6 mm	3	9604T22	000000
		45 mm	73 mm	32 mm	107 mm	13 mm	14 mm	3.8 mm	Keyed	Socket Head	2	No	M6 × 1 mm	3	8.4 mm	3	9604T23	000000
		50 mm	78 mm	31.75 mm	114 mm	12.7 mm	14 mm	3.8 mm	Keyed	Socket Head	2	No	M8 × 1.25 mm	3	8.4 mm	3	9604T24	000000


		303 Stainless Steel



				1/4"	13/16"	5/8"	1 15/32"	1/4"	—	—	Round	Socket Head	2	No	4-40	3	1/8"	3	9692T28	00000


				3/8"	1 1/16"	11/16"	1 23/32"	1/4"	3/32"	1/16"	Keyed	Socket Head	2	No	6-32	3	5/32"	3	9692T31	00000
				1/2"	1 1/4"	3/4"	2 7/32"	9/32"	1/8"	1/16"	Keyed	Socket Head	2	No	8-32	3	5/32"	3	9692T32	000000
				5/8"	1 1/2"	13/16"	2 19/32"	5/16"	3/16"	5/64"	Keyed	Socket Head	2	No	10-24	3	3/16"	3	9692T33	000000
				3/4"	1 3/4"	1"	2 31/32"	13/32"	3/16"	3/32"	Keyed	Socket Head	2	No	1/4"-20	3	1/4"	3	9692T34	000000
				1"	2"	1"	3 7/32"	13/32"	1/4"	1/8"	Keyed	Socket Head	2	No	1/4"-20	3	1/4"	3	9692T35	000000
				1 1/8"	2 1/8"	1"	3 7/32"	13/32"	1/4"	1/8"	Keyed	Socket Head	2	No	1/4"-20	3	1/4"	3	9692T36	000000
				1 1/4"	2 1/4"	1"	3 15/32"	13/32"	1/4"	1/8"	Keyed	Socket Head	2	No	1/4"-20	3	1/4"	3	9692T37	000000
				1 3/8"	2 3/8"	1"	3 19/32"	13/32"	5/16"	9/64"	Keyed	Socket Head	2	No	1/4"-20	3	1/4"	3	9692T38	000000
				1 1/2"	2 1/2"	1"	3 23/32"	13/32"	3/8"	11/64"	Keyed	Socket Head	2	No	1/4"-20	3	1/4"	3	9692T39	000000
				1 3/4"	3"	1 1/4"	4 15/32"	1/2"	3/8"	11/64"	Keyed	Socket Head	2	No	5/16"-18	3	5/16"	3	9692T41	000000


				1 15/16"	3 1/4"	1 1/4"	4 23/32"	1/2"	1/2"	7/32"	Keyed	Socket Head	2	No	5/16"-18	3	5/16"	3	9692T42	000000
				2"	3 1/4"	1 1/4"	4 23/32"	1/2"	1/2"	7/32"	Keyed	Socket Head	2	No	5/16"-18	3	5/16"	3	9692T43	000000
				2 1/4"	3 1/2"	1 1/4"	4 31/32"	1/2"	1/2"	15/64"	Keyed	Socket Head	2	No	5/16"-18	3	5/16"	3	9692T45	000000
3"				4 1/2"	1 3/8"	6 11/32"	1/2"	3/4"	21/64"	Keyed	Socket Head	2	No	3/8"-16	3	3/8"	3	9692T48	000000
6 mm	16 mm			19 mm	38 mm	6.9 mm	—	—	Round	Socket Head	2	No	M3 × 0.5 mm	3	3 mm	3	9624T15	00000
8 mm	18 mm			19 mm	41 mm	6.9 mm	2 mm	1 mm	Keyed	Socket Head	2	No	M3 × 0.5 mm	3	3 mm	3	9624T16	00000
10 mm	24 mm			19 mm	45 mm	6.9 mm	3 mm	1.4 mm	Keyed	Socket Head	2	No	M3 × 0.5 mm	3	3 mm	3	9624T17	00000
12 mm	28 mm			19 mm	55 mm	6.9 mm	4 mm	1.8 mm	Keyed	Socket Head	2	No	M4 × 0.7 mm	3	4 mm	3	9624T18	000000
16 mm	34 mm			20.6 mm	63 mm	6.9 mm	5 mm	2.3 mm	Keyed	Socket Head	2	No	M5 × 0.8 mm	3	5.4 mm	3	9624T19	000000
18 mm	36 mm			20.64 mm	63 mm	6.85 mm	6 mm	2.8 mm	Keyed	Socket Head	2	No	M5 × 0.8 mm	3	5.4 mm	3	9624T22	000000


20 mm	40 mm			25.4 mm	69 mm	7.9 mm	6 mm	2.8 mm	Keyed	Socket Head	2	No	M6 × 1 mm	3	6 mm	3	9624T23	000000
25 mm	45 mm			25.4 mm	75 mm	7.9 mm	8 mm	3.3 mm	Keyed	Socket Head	2	No	M6 × 1 mm	3	6 mm	3	9624T24	000000
30 mm	54 mm			25.4 mm	82 mm	7.9 mm	8 mm	3.3 mm	Keyed	Socket Head	2	No	M6 × 1 mm	3	6 mm	3	9624T25	000000
35 mm	57 mm			25.4 mm	88 mm	7.9 mm	10 mm	3.3 mm	Keyed	Socket Head	2	No	M6 × 1 mm	3	6 mm	3	9624T26	000000
40 mm	60 mm			25.4 mm	92 mm	7.9 mm	12 mm	3.3 mm	Keyed	Socket Head	2	No	M6 × 1 mm	3	6 mm	3	9624T27	000000
45 mm	73 mm			32 mm	107 mm	13 mm	14 mm	3.8 mm	Keyed	Socket Head	2	No	M6 × 1 mm	3	8.4 mm	3	9624T28	000000
50 mm	78 mm			31.75 mm	114 mm	12.7 mm	14 mm	3.8 mm	Keyed	Socket Head	2	No	M8 × 1.25 mm	3	8.4 mm	3	9624T29	000000


Aluminum



				1/4"	13/16"	5/8"	1 15/32"	1/4"	—	—	Round	Socket Head	2	No	4-40	3	1/8"	3	9793T11	00000


				3/8"	1 1/16"	11/16"	1 23/32"	1/4"	3/32"	1/16"	Keyed	Socket Head	2	No	6-32	3	5/32"	3	9793T12	00000
				1/2"	1 1/4"	3/4"	2 7/32"	9/32"	1/8"	1/16"	Keyed	Socket Head	2	No	8-32	3	5/32"	3	9793T13	00000
				5/8"	1 1/2"	13/16"	2 19/32"	5/16"	3/16"	5/64"	Keyed	Socket Head	2	No	10-24	3	3/16"	3	9793T14	000000
				3/4"	1 3/4"	1"	2 31/32"	13/32"	3/16"	3/32"	Keyed	Socket Head	2	No	1/4"-20	3	1/4"	3	9793T15	000000
				1"	2"	1"	3 7/32"	13/32"	1/4"	1/8"	Keyed	Socket Head	2	No	1/4"-20	3	1/4"	3	9793T16	000000
				1 1/8"	2 1/8"	1"	3 7/32"	13/32"	1/4"	1/8"	Keyed	Socket Head	2	No	1/4"-20	3	1/4"	3	9793T17	000000
				1 1/4"	2 1/4"	1"	3 15/32"	13/32"	1/4"	1/8"	Keyed	Socket Head	2	No	1/4"-20	3	1/4"	3	9793T18	000000
				1 3/8"	2 3/8"	1"	3 19/32"	13/32"	5/16"	9/64"	Keyed	Socket Head	2	No	1/4"-20	3	1/4"	3	9793T19	000000
				1 1/2"	2 1/2"	1"	3 23/32"	13/32"	3/8"	11/64"	Keyed	Socket Head	2	No	1/4"-20	3	1/4"	3	9793T21	000000
				1 3/4"	3"	1 1/4"	4 15/32"	1/2"	3/8"	11/64"	Keyed	Socket Head	2	No	5/16"-18	3	5/16"	3	9793T22	000000


				1 15/16"	3 1/4"	1 1/4"	4 23/32"	1/2"	1/2"	7/32"	Keyed	Socket Head	2	No	5/16"-18	3	5/16"	3	9793T23	000000
				2"	3 1/4"	1 1/4"	4 23/32"	1/2"	1/2"	7/32"	Keyed	Socket Head	2	No	5/16"-18	3	5/16"	3	9793T24	000000
				2 1/4"	3 1/2"	1 1/4"	4 31/32"	1/2"	1/2"	15/64"	Keyed	Socket Head	2	No	5/16"-18	3	5/16"	3	9793T26	000000
				2 1/2"	4"	1 3/8"	5 23/32"	1/2"	5/8"	9/32"	Keyed	Socket Head	2	No	3/8"-16	3	3/8"	3	9793T28	000000
				3"	4 1/2"	1 3/8"	6 11/32"	1/2"	3/4"	21/64"	Keyed	Socket Head	2	No	3/8"-16	3	3/8"	3	9793T29	000000
				6 mm	16 mm	19 mm	38 mm	6.9 mm	—	—	Round	Socket Head	2	No	M3 × 0.5 mm	3	3 mm	3	9723T11	00000
				8 mm	18 mm	19 mm	41 mm	6.9 mm	2 mm	1 mm	Keyed	Socket Head	2	No	M3 × 0.5 mm	3	3 mm	3	9723T12	00000
		10 mm		24 mm	19 mm	45 mm	6.9 mm	3 mm	1.4 mm	Keyed	Socket Head	2	No	M3 × 0.5 mm	3	3 mm	3	9723T13	00000
		12 mm	28 mm	19 mm	55 mm	6.9 mm	4 mm	1.8 mm	Keyed	Socket Head	2	No	M4 × 0.7 mm	3	4 mm	3	9723T14	00000
		16 mm	34 mm	20.6 mm	63 mm	6.9 mm	5 mm	2.3 mm	Keyed	Socket Head	2	No	M5 × 0.8 mm	3	5 mm	3	9723T15	00000


		18 mm	36 mm	20.64 mm	63 mm	6.85 mm	6 mm	2.8 mm	Keyed	Socket Head	2	No	M5 × 0.8 mm	3	5 mm	3	9723T16	00000
		20 mm	40 mm	25.4 mm	69 mm	7.9 mm	6 mm	2.8 mm	Keyed	Socket Head	2	No	M6 × 1 mm	3	6 mm	3	9723T17	00000
		25 mm	45 mm	25.4 mm	75 mm	7.9 mm	8 mm	3.3 mm	Keyed	Socket Head	2	No	M6 × 1 mm	3	6 mm	3	9723T18	00000
		30 mm	54 mm	25.4 mm	82 mm	7.9 mm	8 mm	3.3 mm	Keyed	Socket Head	2	No	M6 × 1 mm	3	6 mm	3	9723T19	000000
		40 mm	60 mm	25.4 mm	92 mm	7.9 mm	12 mm	3.3 mm	Keyed	Socket Head	2	No	M6 × 1 mm	3	6 mm	3	9723T22	000000
		50 mm	78 mm	31.75 mm	114 mm	12.7 mm	14 mm	3.8 mm	Keyed	Socket Head	2	No	M8 × 1.25 mm	3	8 mm	3	9723T24	000000

Flange Extensions

Image of Product. Front orientation. Shaft Collar Flanges.

Extend the OD of the flange to mount larger components.

		Flange
	For Shaft Dia.	OD	Thick.	Mounting Fasteners Included		Each
Carbon Steel



		1/2"	3 1/4"	3/8"	Yes	9684T21	000000


		5/8"	3 5/8"	3/8"	Yes	9684T22	00000
		3/4"	4"	3/8"	Yes	9684T23	00000
		1"	4 1/4"	3/8"	Yes	9684T24	00000
		1 1/4"	4 1/2"	3/8"	Yes	9684T25	00000
		1 1/2"	4 3/4"	3/8"	Yes	9684T26	00000

Easy-Access Flange-Mount Linear 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 supports allow you to hold linear shafts perpendicular to the mounting surface. Secure the shaft by tightening the clamping screw. These supports are machined to have flat, square surfaces, so they can be used to align other supports and parts in your system.

304 Stainless Steel—Stainless steel supports resist corrosion better than aluminum supports.

Anodized 6061 Aluminum—Aluminum supports are lightweight and resist corrosion.

		Overall						Mounting Hole
	For Shaft Dia.	Dia.	Lg.	Wd.	Ht.	Flange Thk.	Bolt Circle Dia.	No. of	Ctr.-to-Ctr.	Dia.	Clamping Screw Thread Size	Fabrication		Each
1117 Carbon Steel



		1/4"	1 5/8"	—	3/4"	—	1/4"	1 11/32"	4	—	0.15"	6-32	Machined	1870K1	000000


		3/8"	1 5/8"	—	3/4"	—	1/4"	1 11/32"	4	—	0.15"	6-32	Machined	1870K2	00000
		1/2"	2 1/4"	—	1"	—	5/16"	1 3/4"	4	—	0.177"	8-32	Machined	1870K3	00000
		5/8"	2 5/8"	—	1"	—	5/16"	2 1/8"	4	—	0.201"	10-32	Machined	1870K4	00000
		3/4"	3"	—	1"	—	5/16"	2 3/8"	4	—	0.266"	1/4"-28	Machined	1870K5	00000
		1"	3 1/4"	—	1 5/8"	—	3/8"	2 3/4"	4	—	0.266"	1/4"-28	Machined	1870K6	000000
		1 1/4"	3 1/2"	—	1 5/8"	—	3/8"	3"	4	—	0.266"	1/4"-28	Machined	1870K7	000000
		1 1/2"	3 3/4"	—	2"	—	13/32"	3 1/4"	4	—	0.266"	1/4"-28	Machined	1870K8	000000
		2"	4 1/2"	—	2 3/8"	—	1/2"	3 7/8"	4	—	0.328"	5/16"-24	Machined	1870K9	000000


		304 Stainless Steel



				3/8"	—	1 7/16"	5/8"	1 7/16"	3/16"	—	4	1 1/8"	0.17"	6-32	Machined	1870K11	00000


				1/2"	—	1 11/16"	3/4"	1 11/16"	1/4"	—	4	1 1/4"	0.2"	8-32	Machined	1870K12	000000
				3/4"	—	2 3/16"	3/4"	2 3/16"	1/4"	—	4	1 3/4"	0.22"	10-24	Machined	1870K13	000000
				1"	—	2 11/16"	1 1/16"	2 11/16"	5/16"	—	4	2 1/8"	0.28"	1/4"-20	Machined	1870K14	000000
				10 mm	—	43 mm	19 mm	43 mm	6 mm	—	4	32 mm	4.8 mm	M4	Machined	1870K35	000000
				12 mm	—	43 mm	19 mm	43 mm	6 mm	—	4	32 mm	4.8 mm	M4	Machined	1870K32	000000
				20 mm	—	55 mm	20 mm	55 mm	6 mm	—	4	42 mm	5.8 mm	M5	Machined	1870K36	000000
				25 mm	—	68 mm	28 mm	68 mm	8 mm	—	4	54 mm	7.1 mm	M6	Machined	1870K34	000000


				Anodized 6061 Aluminum



						8 mm	—	36 mm	16 mm	36 mm	5 mm	—	4	28 mm	4.8 mm	M4	Machined	1870K29	00000


						10 mm	—	43 mm	19 mm	43 mm	6 mm	—	4	32 mm	4.8 mm	M4	Machined	1870K22	00000
						12 mm	—	43 mm	19 mm	43 mm	6 mm	—	4	32 mm	4.8 mm	M4	Machined	1870K51	00000
						16 mm	—	55 mm	20 mm	55 mm	6 mm	—	4	42 mm	5.8 mm	M5	Machined	1870K24	00000
						20 mm	—	55 mm	20 mm	55 mm	6 mm	—	4	42 mm	5.8 mm	M5	Machined	1870K25	00000
						25 mm	—	68 mm	28 mm	68 mm	8 mm	—	4	54 mm	7.1 mm	M6	Machined	1870K26	00000
						30 mm	—	87 mm	28 mm	87 mm	8 mm	—	4	64 mm	9.9 mm	M8	Machined	1870K27	00000
						40 mm	—	100 mm	30 mm	100 mm	10 mm	—	4	75 mm	9.9 mm	M8	Machined	1870K28	00000

Pipe Bushings for Shaft Collars

Sized specifically to adapt standard shaft collars to pipe, these bushings create a tight fit.

Nylon—They're nylon, so they won't break if your pipe expands or contracts.

1 Flange—One-flange bushings can be installed when a shaft collar is already loosely assembled around the pipe. Because there is only one flange, the collar could slip off over time.

2 Flanges—Two-flange bushings prevent shaft collars from sliding off even in high-vibration environments. You’ll need to disassemble your shaft collar to install it around these bushings.

				Sleeve
	Pipe Size	ID	Overall Lg.	OD	Lg.	Flange OD		Each
Nylon







				1 Flange

				3/8	0.690"	9/16"	1"	1/2"	1 1/8"	3936N11	000000


				1/2	0.857"	9/16"	1 1/8"	1/2"	1 1/4"	3936N13	00000
				3/4	1.065"	9/16"	1 1/4"	1/2"	1 3/8"	3936N15	00000
				1	1.330"	5/8"	1 1/2"	9/16"	1 5/8"	3936N17	00000
				1 1/4	1.675"	3/4"	1 13/16"	11/16"	2 1/16"	3936N19	00000
				1 1/2	1.915"	13/16"	2 1/8"	3/4"	2 1/4"	3936N22	00000




						2 Flanges

						3/8	0.690"	5/8"	1"	1/2"	1 1/8"	3936N12	00000


						1/2	0.857"	5/8"	1 1/8"	1/2"	1 1/4"	3936N14	00000
						3/4	1.065"	5/8"	1 1/4"	1/2"	1 3/8"	3936N16	00000
						1	1.330"	11/16"	1 1/2"	9/16"	1 5/8"	3936N18	00000
						1 1/4	1.675"	13/16"	1 13/16"	11/16"	2 1/16"	3936N21	00000
						1 1/2	1.915"	7/8"	2 1/8"	3/4"	2 1/4"	3936N23	00000