Square Shaft Bushings | McMaster-Carr

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Black Oxide

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34 Products

Square Two-Piece Shaft Collars

Attach these collars anywhere on a square shaft when other components are already installed or you can't access the ends. They clamp firmly and evenly onto all four flats without marring the shaft, so you can reposition or remove collars later.

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.

				Clamping Screw
	For Shaft Wd.	OD	Wd.	Type	No. Included		Each
Black-Oxide Carbon Steel



		1/4"	1 1/16"	5/16"	Socket Head	2	3325K11	000000


		5/16"	1 1/16"	5/16"	Socket Head	2	3325K12	00000
		3/8"	1 1/2"	13/32"	Socket Head	2	3325K13	00000
		7/16"	1 1/2"	13/32"	Socket Head	2	3325K14	00000
		1/2"	1 3/4"	1/2"	Socket Head	2	3325K15	00000
		9/16"	1 3/4"	1/2"	Socket Head	2	3325K16	00000
		5/8"	2"	1/2"	Socket Head	2	3325K17	00000
		3/4"	2 1/8"	1/2"	Socket Head	2	3325K18	00000
		7/8"	2 1/4"	1/2"	Socket Head	2	3325K19	00000
		1"	2 1/2"	1/2"	Socket Head	2	3325K21	00000
		1 1/8"	3"	5/8"	Socket Head	2	3325K22	00000


		1 1/4"	3"	5/8"	Socket Head	2	3325K23	00000
		1 3/8"	3 1/4"	5/8"	Socket Head	2	3325K24	00000
		1 1/2"	3 1/2"	5/8"	Socket Head	2	3325K25	00000
		1 3/4"	4"	3/4"	Socket Head	2	3325K26	00000
		2"	4 1/4"	3/4"	Socket Head	2	3325K27	00000
		2 1/2"	5"	3/4"	Socket Head	2	3325K28	00000


		303 Stainless Steel



				1/4"	1 1/16"	5/16"	Socket Head	2	3257K11	00000


				5/16"	1 1/16"	5/16"	Socket Head	2	3257K12	00000
				3/8"	1 1/2"	13/32"	Socket Head	2	3257K13	00000
				7/16"	1 1/2"	13/32"	Socket Head	2	3257K14	00000
				1/2"	1 3/4"	1/2"	Socket Head	2	3257K15	00000
				9/16"	1 3/4"	1/2"	Socket Head	2	3257K16	00000
				5/8"	2"	1/2"	Socket Head	2	3257K17	00000
				3/4"	2 1/8"	1/2"	Socket Head	2	3257K18	00000
				7/8"	2 1/4"	1/2"	Socket Head	2	3257K19	00000
				1"	2 1/2"	1/2"	Socket Head	2	3257K21	00000
				1 1/8"	3"	5/8"	Socket Head	2	3257K22	00000


				1 1/4"	3"	5/8"	Socket Head	2	3257K23	00000
				1 3/8"	3 1/4"	5/8"	Socket Head	2	3257K24	00000
				1 1/2"	3 1/2"	5/8"	Socket Head	2	3257K25	00000
				1 3/4"	4"	3/4"	Socket Head	2	3257K26	000000
				2"	4 1/4"	3/4"	Socket Head	2	3257K27	000000
				2 1/2"	5"	3/4"	Socket Head	2	3257K28	000000