C8 Magnets | McMaster-Carr

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112 Products

About Magnets

Choose a magnet with the right strength, material, and temperature resistance for your application.

Mount Type

Plain Back

Our standard magnets to hang, secure, and position metal objects

42 products

Unthreaded Hole

Mount with pins, bolts, or rivets

26 products

Mount Type

Threaded Hole

Internally threaded for secure mounting with screws or bolts

13 products

Threaded Stud

Screw into tapped holes for secure mounting that’s also removable

31 products

Threaded Encased Ceramic Disc Magnets


1	2	3

Thread our most economical magnets into position, then readjust if needed. With built-in durability, a protective case shields these from cracks and chips caused by bumps and drops. Ceramic magnets deliver a cost-effective balance of corrosion and temperature resistance. However, they are not as strong as rare earth magnets.

Warning: Maximum pull ratings are based on direct contact with rust-free, unpainted iron surfaces. Variations in material condition will significantly reduce holding strength. Do not use for lifting over people.

Magnets With Threaded Hole


1	2

Internally threaded for secure mounting with screws or bolts.

Zinc-Plated Steel Case—Withstands occasional exposure to moisture.

Aluminum Case—Lightweight and corrosion-resistant, this case is best for applications with weight limitations. However, the magnetic strength is lower than steel.

										Thread
	Style	Thk.	OD	Post Lg., mm	Overall Lg., mm	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Mounting Hole Style	Size	Dp.		Each
Zinc-Plated Steel Case



		1	6.1 mm	20 mm	6.9	13	6	175	C8	Straight	M3 × 0.5 mm	6.9 mm	5819K51	00000


		1	7.1 mm	32 mm	7.9	15	18	175	C8	Straight	M4 × 0.7 mm	7.9 mm	5819K52	0000
		1	7.9 mm	40 mm	9.1	17	28	175	C8	Straight	M4 × 0.7 mm	8.6 mm	5819K53	0000
		1	10.4 mm	57 mm	8.6	19	60	175	C8	Straight	M4 × 0.7 mm	8.1 mm	5819K54	0000


		Aluminum Case



				2	1/2"	5/8"	—	—	3	175	C8	Straight	8-32	3/16"	5703K54	0000


				2	1/2"	3/4"	—	—	4	175	C8	Straight	10-32	3/16"	5703K55	0000
				2	1"	5/8"	—	—	8	175	C8	Straight	8-32	3/16"	5703K48	0000
				2	1"	5/8"	—	—	14	175	C8	Straight	8-32	3/16"	5735K71	00000
				2	1"	3/4"	—	—	17	175	C8	Straight	10-32	3/16"	5703K51	0000
				2	1"	3/4"	—	—	23	175	C8	Straight	10-32	3/16"	5735K72	00000
				2	1"	1"	—	—	23	175	C8	Straight	1/4"-20	1/4"	5703K52	00000
				2	1"	1"	—	—	40	175	C8	Straight	1/4"-20	1/4"	5735K73	00000
				2	1 1/4"	1 1/4"	—	—	40	175	C8	Straight	1/4"-20	1/4"	5703K53	00000

Magnets With Threaded Stud

Image of Product. 3. Front orientation. Magnets. Encased, Ferrite Ceramic, Disc, Threaded-Stud Mount, Style 3.

Screw into tapped holes for secure mounting that’s also removable.

Zinc-Plated Steel Case—Withstands occasional exposure to moisture.

Nickel-Plated Steel Case—Offers similar corrosion resistance to chrome plating to withstand salt water and chemicals. However, nickel is more likely to wear off over time.

Powder-Coated Steel Case—The coating creates a corrosion-resistant barrier for outdoor applications.

	Thk.	OD	Stud Lg.	Overall Lg.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Thread Size		Each
Zinc-Plated Steel Case



	3	3/16"	2 1/4"	1"	1 3/16"	5	300	C8	5/16"-18	5819K41	000000


	Nickel-Plated Steel Case



			3	5/16"	63/64"	0.413"	47/64"	8	120	C8	10-24	5819K111	0000


			3	5/16"	1 17/64"	0.413"	47/64"	13	120	C8	1/4"-20	5819K115	0000
			3	5/16"	1 27/64"	0.55"	55/64"	20	120	C8	1/4"-20	5819K119	0000
			3	23/64"	1 21/32"	1/2"	55/64"	25	120	C8	5/16"-18	5819K124	0000
			3	29/64"	1 57/64"	1/2"	61/64"	35	120	C8	5/16"-18	5819K128	0000
			3	1/2"	2"	1/2"	1"	55	120	C8	1/4"-20	5819K133	00000
			3	5/8"	2 1/2"	0.846"	1 15/32"	68	120	C8	3/8"-16	5819K137	00000
			3	49/64"	3"	0.87"	1 5/8"	130	120	C8	3/8"-16	5819K142	00000
			3	8 mm	25 mm	8 mm	16 mm	8	120	C8	M5 × 0.8 mm	5819K113	0000
			3	8 mm	32 mm	10 mm	18 mm	13	120	C8	M6 × 1 mm	5819K117	0000
			3	8 mm	36 mm	10 mm	18 mm	20	120	C8	M6 × 1 mm	5819K122	0000


			3	9 mm	42 mm	10 mm	19 mm	25	120	C8	M6 × 1 mm	5819K126	0000
			3	11.5 mm	48 mm	10 mm	21.5 mm	35	120	C8	M8 × 1.25 mm	5819K131	0000
			3	13 mm	50.8 mm	10 mm	23 mm	55	120	C8	M8 × 1.25 mm	5819K135	00000
			3	16 mm	63.5 mm	11.5 mm	27.5 mm	68	120	C8	M8 × 1.25 mm	5819K139	00000
			3	19 mm	76.2 mm	15 mm	34 mm	130	120	C8	M10 × 1.5 mm	5819K144	00000


			Powder-Coated Steel Case



					3	5/16"	63/64"	0.413"	47/64"	4	120	C8	10-24	5819K112	0000


					3	5/16"	1 17/64"	0.413"	47/64"	9	120	C8	1/4"-20	5819K116	0000
					3	23/64"	1 21/32"	1/2"	55/64"	21	120	C8	5/16"-18	5819K125	0000
					3	29/64"	1 57/64"	1/2"	61/64"	29	120	C8	5/16"-18	5819K129	0000
					3	1/2"	2"	1/2"	1"	48	120	C8	1/4"-20	5819K134	00000
					3	5/8"	2 1/2"	0.846"	1 15/32"	60	120	C8	3/8"-16	5819K138	00000
					3	49/64"	3"	0.87"	1 5/8"	110	120	C8	3/8"-16	5819K143	00000
					3	8 mm	25 mm	8 mm	16 mm	4	120	C8	M5 × 0.8 mm	5819K114	0000
					3	8 mm	32 mm	10 mm	18 mm	9	120	C8	M6 × 1 mm	5819K118	0000
					3	9 mm	42 mm	10 mm	19 mm	21	120	C8	M6 × 1 mm	5819K127	0000
					3	11.5 mm	48 mm	10 mm	21.5 mm	29	120	C8	M8 × 1.25 mm	5819K132	0000


					3	13 mm	50.8 mm	10 mm	23 mm	48	120	C8	M8 × 1.25 mm	5819K136	00000
					3	16 mm	63.5 mm	11.5 mm	27.5 mm	60	120	C8	M8 × 1.25 mm	5819K141	00000
					3	19 mm	76.2 mm	15 mm	34 mm	110	120	C8	M10 × 1.5 mm	5819K145	00000

Encased Ceramic Disc Magnets


1	2

3

Our most economical magnets with built-in durability. A protective case shields them from cracks and chips caused by bumps and drops. Ceramic magnets deliver a cost-effective balance of corrosion and temperature resistance. However, they are not as strong as rare earth magnets.

Standard Magnets

Aluminum Case—Lightweight and corrosion-resistant, this case is best for applications with weight limitations. However, the magnetic strength is lower than steel.

	Thk.	OD	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade		Each
Aluminum Case



	1	1/2"	1/4"	0.4	175	C8	5703K47	00000


	1	1/2"	1/2"	2.2	175	C8	5703K32	0000
	1	1"	1/2"	3	175	C8	5703K18	00000
	1	1"	5/8"	5	175	C8	5703K41	00000
	1	1"	5/8"	7	175	C8	5735K12	00000
	1	1"	3/4"	15	175	C8	5735K62	00000
	1	1 1/4"	3/4"	10	175	C8	5703K42	00000
	1	1 1/4"	1 1/4"	50	175	C8	5735K65	00000

Magnets With Unthreaded Hole


2	3

Zinc-Plated Steel Case—Withstands occasional exposure to moisture.

Anodized Aluminum Case—The anodized finish adds an extra layer of corrosion resistance.

	Thk.	OD	Hole Dia.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Mounting Hole Style	For Screw Size		Each
Zinc-Plated Steel Case



	2	3/16"	1 15/64"	5/32"	15	245	C8	Straight	No. 6	5685K31	00000


	2	9/32"	1 13/32"	3/16"	25	245	C8	Straight	No. 8	5685K26	0000
	2	5/16"	2 1/32"	3/16"	42	245	C8	Straight	No. 8	5685K32	0000
	2	3/8"	2 5/8"	9/32"	80	245	C8	Straight	1/4"	5685K28	0000
	2	3/8"	2 7/8"	9/32"	112	245	C8	Straight	1/4"	5685K33	0000
	2	7/16"	3 3/16"	9/32"	140	245	C8	Straight	1/4"	5685K39	0000
	2	1/2"	4 29/32"	1/2"	170	245	C8	Straight	1/2"	5685K35	00000
	2	33/64"	3 7/8"	3/8"	147	245	C8	Straight	5/16"	5685K83	00000
	3	3/16"	1 15/64"	0.138"	15	245	C8	Straight	No. 6	5819K31	0000
	3	5/16"	2 1/32"	0.19"	42	245	C8	Straight	No. 10	5819K33	0000
	3	3/8"	2 5/8"	1/4"	80	245	C8	Straight	1/4"	5819K35	00000


	3	7/16"	3 3/16"	1/4"	140	245	C8	Straight	1/4"	5819K37	00000
	3	1/2"	4 29/32"	1/2"	170	245	C8	Straight	3/8"	5819K43	00000


	Anodized Aluminum Case



			1	1/2"	3"	1/4"	24	180	C8	Straight	1/4"	5782K71	00000

Encased Ceramic Rectangle Magnets


1	2

3	4

Warning: Maximum pull ratings are based on direct contact with rust-free, unpainted iron surfaces. Variations in material condition will significantly reduce these ratings. Do not use for lifting over people.

Standard Magnets


1	2	3

Steel Case—Maximizes holding power by concentrating magnetic force.

Aluminum Case—Lightweight and corrosion-resistant, this case is best for applications with weight limitations. However, the magnetic strength is lower than steel.

Plastic Case—Lightweight, nonconductive, and naturally rust resistant.

	Thk.	Wd.	Lg.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade		Each
Steel Case



	1	1/8"	33/64"	1"	2.2	175	C8	57005K91	00000


	1	3/16"	15/32"	1 21/32"	4	175	C8	57005K93	0000
	1	3/16"	33/64"	1"	3	175	C8	57005K92	0000


	Aluminum Case



			2	1 1/4"	1 1/4"	4 1/2"	75	180	C8	5740K14	00000


			2	1 1/4"	1 1/4"	4 1/2"	110	180	C8	5740K21	00000
			2	1 1/4"	1 7/8"	4 1/2"	150	180	C8	5740K24	00000
			2	1 1/4"	2 1/2"	4 1/2"	230	180	C8	5740K33	00000


			Plastic Case



					3	1 1/4"	1"	4 1/2"	45	300	C8	5740K11	00000


					3	1 1/4"	1"	4 1/2"	55	300	C8	5740K13	00000
					3	1 1/4"	1"	4 1/2"	65	300	C8	5740K12	00000

Magnets With Unthreaded Hole

Steel Case—Maximizes holding power by concentrating magnetic force.

Zinc-Plated Steel Case—Withstands occasional exposure to moisture.

Cadmium-Plated Steel Case—More rust resistant than zinc-plated steel for use in wet and outdoor environments.

Stainless Steel Case—Our most corrosion-resistant case withstands exposure to chemicals. However, it's not as strong as steel.

	Thk.	Wd.	Lg.	Hole Dia.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Mounting Hole Style	For Screw Size		Each
Steel Case



	1	1/4"	7/8"	1"	1/8"	7	175	C8	Straight	No. 4	57005K21	00000


	2	5/16"	13/16"	1"	3/16"	8	175	C8	Straight	No. 8	57005K22	0000
	2	5/8"	1"	2"	3/16"	45	175	C8	Straight	No. 8	57005K23	0000
	3	5/16"	15/16"	2 5/8"	5/32"	6	175	C8	Straight	No. 6	57005K24	0000


	Zinc-Plated Steel Case



			3	29/64"	1 1/2"	3"	3/16"	45	170	C8	Straight	No. 8	57005K87	0000


			3	29/64"	1 1/2"	8"	3/16"	120	170	C8	Straight	No. 8	57005K88	00000
			3	29/64"	1 1/2"	12"	3/16"	180	170	C8	Straight	No. 8	57005K89	00000
			4	1"	1 5/8"	2"	7/32"	35	170	C8	Straight	No. 10	57005K27	00000


			Cadmium-Plated Steel Case



					3	1/2"	1 3/16"	2 3/4"	3/16"	35	175	C8	Straight	No. 8	57005K25	0000


					Stainless Steel Case



							3	3/8"	1 3/8"	3 1/4"	0.28"	25	300	C8	Straight	1/4"	57005K98	00000


							3	9/16"	1 3/8"	3 1/4"	0.28"	31	300	C8	Straight	1/4"	57005K99	00000

Ceramic Rectangle Magnets

Magnetized

Through

Thickness

Our most economical magnets cut costs, not reliability. They stay strong in temperatures up to 400° F and resist some corrosion. They’re also nonconductive to prevent short circuits in DC motors, transformers, and speakers. However, they are not as strong as rare earth magnets.

Standard Magnets

Magnetized Through Thickness—Magnetized from one flat face to the other, these magnets deliver a concentrated magnetic force. They’re best for direct contact with flat surfaces.

	Lg.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Direction of Magnetization		Each
1/8" Thick



	1"	2"	0.9	400	C8	Through Thickness	5738K52	00000


	3/16" Thick



			1"	2"	1.7	400	C8	Through Thickness	5738K53	0000


			1/4" Thick



					1"	2"	5	400	C8	Through Thickness	5738K32	0000


					4"	4"	7	400	C8	Through Thickness	5738K67	00000


					3/8" Thick



							7/8"	1 7/8"	6	400	C8	Through Thickness	5738K31	0000


							1/2" Thick



									1"	2"	7	400	C8	Through Thickness	5738K33	0000


									2"	3"	13	400	C8	Through Thickness	5738K68	0000
									4"	6"	23	400	C8	Through Thickness	5738K69	00000


									3/4" Thick



											1"	2"	9	400	C8	Through Thickness	5738K34	0000


											1"	10 1/2"	21	400	C8	Through Thickness	5738K54	00000


											1" Thick



													1/2"	2"	6	400	C8	Through Thickness	5738K55	0000


													1"	2"	11	400	C8	Through Thickness	5738K35	0000
													1 1/4"	2"	11	400	C8	Through Thickness	5738K56	0000
													1 1/2"	2"	13	400	C8	Through Thickness	5738K57	0000
													2"	2"	15	400	C8	Through Thickness	5738K36	0000
													2"	10 1/2"	35	400	C8	Through Thickness	5738K58	00000
													3"	6"	48	400	C8	Through Thickness	5738K71	00000
4"													6"	35	400	C8	Through Thickness	5738K51	00000

Ceramic Disc Magnets

Standard Magnets

Magnetized

Through

Thickness

Magnetized Through Thickness—Magnetized from one flat face to the other, these magnets deliver a concentrated magnetic force. They’re best for direct contact with flat surfaces.

	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Direction of Magnetization		Each
3/8" Thick



	3/4"	1.6	400	C8	Through Thickness	5857K27	00000


	1" Thick



			7/8"	4	400	C8	Through Thickness	5857K15	0000

Magnets With Unthreaded Hole


	Magnetized Through Thickness

Magnetized Through Thickness—Magnetized from one flat face to the other, these magnets deliver a concentrated magnetic force. They’re best for direct contact with flat surfaces.

	Hole Dia.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Direction of Magnetization	Mounting Hole Style		Each
0.118" Thick



	11/16"	19/64"	0.4	400	C8	Through Thickness	Straight	5856K11	00000

Nonmarring Encased Ceramic Rectangle Magnets

These safeguarded, economical magnets grip surfaces without marking them. The rubber-coated case protects metal housings and control panels from scratches and adds friction for a tight grip. It also shields the magnet from the elements as well as cracks and chips caused by drops and bumps. Ceramic magnets deliver a cost-effective balance of corrosion and temperature resistance. However, they are not as strong as rare earth magnets.

Warning: Maximum pull ratings are based on direct contact with rust-free, unpainted iron plate. Variations in material condition will significantly reduce these ratings. Do not use for lifting over people.

Standard Magnets

Plastic Case—Lightweight, nonconductive, and naturally rust resistant.

	Wd.	Lg.	Max. Pull, lbf	Max. Temp., ° F	Sets of Poles	Magnet Grade		Each
Plastic Case



	15/64"	51/64"	1 49/64"	5	175	2	C8	57005K95	00000


	15/64"	51/64"	2 23/64"	6	175	2	C8	57005K96	0000

Nonmarring Encased Ceramic Disc Magnets

Plastic Case—Lightweight, nonconductive, and naturally rust resistant.

	Thk.	OD	Max. Pull, lbf	Max. Temp., ° F	Sets of Poles	Magnet Grade		Each
Plastic Case



	1	15/64"	1"	2.8	175	1	C8	57005K84	00000


	2	29/64"	1 1/2"	6	175	1	C8	57005K85	0000