N42 Magnets | McMaster-Carr

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86 Products

About Magnets

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

Encased Neodymium Disc Magnets


1	2	5	7

10	11	12	Magnetized Through Thickness

Powerful performance with built-in durability. A protective case shields these magnets from the elements as well as cracks and chips when handling, mounting, or sweeping them. With the highest strength-to-size ratio of any magnet, these deliver powerful pull force even in tight spaces.

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.

Magnets With Unthreaded Hole


1	2

Mount with pins, bolts, or rivets. There's no need for threading.

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

Chrome-Plated Steel Case—The bright, shiny finish resists salt water and chemicals better than other finishes and is less likely to wear off.

											Each
	Style	Thk.	OD	Hole Dia.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Mounting Hole Style	For Screw Size		1-49	50-Up
Zinc-Plated Steel Case



		1	3/16"	5/8"	0.136"	11	170	N42	Countersunk	No. 5	5679K12	00000	00000


		1	1/4"	3/4"	11/64"	15	170	N42	Countersunk	No. 8	5679K14	0000	0000
		1	1/4"	1"	0.194"	29	170	N42	Countersunk	No. 8	5679K16	0000	0000
		1	3/8"	1 1/4"	0.221"	45	170	N42	Countersunk	No. 10	5679K18	0000	0000
		1	3/8"	1 1/2"	0.221"	70	170	N42	Countersunk	No. 10	5679K26	0000	0000
		1	3/8"	1 3/4"	9/32"	95	170	N42	Countersunk	1/4"	5679K22	00000	0000
		1	1/2"	2"	9/32"	130	170	N42	Countersunk	1/4"	5679K23	00000	00000
		1	5/8"	2 1/2"	13/32"	200	170	N42	Countersunk	3/8"	5679K24	00000	00000
		1	3/4"	3"	13/32"	280	170	N42	Countersunk	3/8"	5679K25	00000	00000


		Chrome-Plated Steel Case



				2	9/32"	1 29/64"	0.197"	60	175	N42	Straight	No. 8	5679K45	00000	00000

Magnets With Threaded Hole


5	Magnetized Through Thickness

Internally threaded for secure mounting with screws or bolts.

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

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.

									Thread			Each
	Style	Thk.	OD	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Direction of Magnetization	Mounting Hole Style	Size	Dp.		1-49	50-Up
Zinc-Plated Steel Case



		5	13/64"	5/8"	18	175	N42	Through Thickness	Straight	8-32	0.27"	5679K53	00000	00000


		5	9/32"	51/64"	28	175	N42	Through Thickness	Straight	8-32	0.27"	5679K54	0000	0000
		5	5/16"	0.984", 63/64"	55	175	N42	Through Thickness	Straight	10-24	0.3"	5679K55	0000	0000
		5	5/16"	1 17/64"	75	175	N42	Through Thickness	Straight	1/4"-20	0.35"	5679K56	0000	0000
		5	5/16"	1 27/64"	100	175	N42	Through Thickness	Straight	1/4"-20	0.38"	5679K57	0000	0000
		5	23/64"	1 21/32"	150	175	N42	Through Thickness	Straight	5/16"-18	0.44"	5679K58	00000	0000
		5	29/64"	1 57/64"	175	175	N42	Through Thickness	Straight	5/16"-18	0.44"	5679K59	00000	00000

Magnets With Threaded Stud


7	10

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

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

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



	7	13/64"	5/8"	1/2"	18	175	N42	8-32	0.3"	1	3506K61	00000


	7	9/32"	51/64"	0.576"	28	175	N42	8-32	0.3"	1	3506K62	0000
	7	5/16"	63/64"	0.615"	55	175	N42	10-24	3/8"	1	3506K63	0000
	7	5/16"	1 17/64"	0.685"	75	175	N42	1/4"-20	3/8"	1	3506K64	0000
	7	5/16"	1 27/64"	0.815"	100	175	N42	1/4"-20	1/2"	1	3506K65	00000
	7	23/64"	1 21/32"	0.856"	150	175	N42	5/16"-18	1/2"	1	3506K66	00000
	7	29/64"	1 57/64"	0.953"	175	175	N42	5/16"-18	1/2"	1	3506K67	00000
	10	0.337"	15/32"	—	4.4	180	N42	—	0.394"	2	3506K34	0000
	10	25/64"	19/32"	—	4.4	180	N42	—	0.453"	2	3506K38	00000

Press Fit Magnets


11	12

Press magnets into drilled holes for flush mounting. Friction holds them in place, so there's no need for screws or adhesives.

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

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

	Thk.	OD	Max. Pull, lbf	Exposed Pole	Max. Temp., ° F	Magnet Grade	Pkg. Qty.		Pkg.
Zinc-Plated Steel Case



	11	0.337"	15/32"	4.4	North Pole	180	N42	1	3506K36	00000


	11	0.337"	15/32"	4.4	South Pole	180	N42	1	3506K37	0000


	Plastic Case



			12	0.413"	19/32"	4.4	—	180	N42	2	3506K35	0000

Multipole Neodymium Disc Magnets

Grip thin metal surfaces where standard magnets fail to hold. These magnets have multiple small poles that generate a shallow, concentrated magnetic field only near the surface. This makes them less likely to accidentally stick to nearby objects. They're often used to mount sensors on thin-walled enclosures or control panels. With the highest strength-to-size ratio of any magnet, these deliver powerful pull force even in tight spaces. Also known as Polymagnets®.

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.

								Each
	OD	Max. Pull, lbf	Sets of Poles	Max. Temp., ° F	Magnet Grade	Direction of Magnetization		1-49	50-Up
1/16" Thick



		3/4"	15	14	180	N42	Through Thickness	2494N54	00000	00000


		1"	17	13	180	N42	Through Thickness	2494N5	0000	0000


		1/8" Thick



				1/2"	9	8	180	N42	Through Thickness	2494N1	0000	0000


				3/4"	18	12	180	N42	Through Thickness	2494N4	0000	0000
				1"	37	22	180	N42	Through Thickness	2494N56	0000	0000
				1 1/2"	77	37	180	N42	Through Thickness	2494N8	00000	00000


				3/16" Thick



						1/2"	11	8	180	N42	Through Thickness	2494N2	0000	0000


						1"	38	13	180	N42	Through Thickness	2494N7	00000	0000

Magnets With Adhesive Back


	Magnetized Through Thickness

Stick in place for fast, tool-free mounting where drilling isn’t practical. The adhesive holds tight without scratching surfaces.

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.

									Each
	OD	Max. Pull, lbf	Sets of Poles	Max. Temp., ° F	Magnet Grade	Direction of Magnetization	Adhesive Type		1-49	50-Up
1/16" Thick



		3/4"	15	13	180	N42	Through Thickness	3M VHB (Very High Bond)	2494N36	00000	00000


		1"	17	13	180	N42	Through Thickness	3M VHB (Very High Bond)	2494N25	0000	0000


		1/8" Thick



				1"	37	13	180	N42	Through Thickness	3M VHB (Very High Bond)	2494N26	00000	0000


				1 1/2"	77	37	180	N42	Through Thickness	3M VHB (Very High Bond)	2494N28	00000	00000


				3/16" Thick



						1"	38	13	180	N42	Through Thickness	3M VHB (Very High Bond)	2494N27	00000	00000

Magnets With Adhesive Back and Unthreaded Hole


	Magnetized Through Thickness

Stick in place for fast, tool-free mounting where drilling isn’t practical. The adhesive holds tight without scratching surfaces. For added holding power, mount with pins, bolts, or rivets. There's no need for threading.

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.

											Each
	OD	Hole Dia.	Max. Pull, lbf	Sets of Poles	Max. Temp., ° F	Magnet Grade	Direction of Magnetization	Adhesive Type	Mounting Hole Style		1-49	50-Up
1/8" Thick



		1"	0.19"	33	10	180	N42	Through Thickness	3M VHB (Very High Bond)	Straight	2494N45	000000	00000


		1 1/2"	1/8"	67	36	180	N42	Through Thickness	3M VHB (Very High Bond)	Straight	2494N46	00000	00000

Magnets With Unthreaded Hole


	Magnetized Through Thickness

Mount with pins, bolts, or rivets. There's no need for threading.

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.

											Each
	OD	Hole Dia.	Max. Pull, lbf	Sets of Poles	Max. Temp., ° F	Magnet Grade	Direction of Magnetization	Mounting Hole Style	For Screw Size		1-49	50-Up
1/8" Thick



		3/4"	1/8"	16	12	180	N42	Through Thickness	Straight	—	2494N12	00000	00000


		3/4"	0.186"	11	6	180	N42	Through Thickness	Countersunk	No. 8	2494N13	0000	0000
		7/8"	0.186"	14	6	180	N42	Through Thickness	Countersunk	No. 8	2494N41	0000	0000
		1"	0.186"	17	12	180	N42	Through Thickness	Countersunk	No. 8	2494N14	00000	00000
		1"	0.19"	33	21	180	N42	Through Thickness	Straight	—	2494N55	0000	0000
		1 1/4"	0.186"	42	6	180	N42	Through Thickness	Countersunk	No. 8	2494N42	00000	00000
		1 1/2"	1/8"	67	37	180	N42	Through Thickness	Straight	—	2494N16	00000	00000


		3/16" Thick



				2"	7/8"	119	86	180	N42	Through Thickness	Straight	—	2494N17	00000	00000

Self-Aligning Neodymium Disc Paired Magnets

Align metal parts consistently without using mechanical guides. These magnet pairs automatically center as they pull together, holding components in the same position every time. Often used to align lenses and sensors, they eliminate the need for recalibration. With the highest strength-to-size ratio of any magnet, these deliver powerful pull force even in tight spaces. Also known as Polymagnets®.

Magnets

						Each
	OD	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade		1-49	50-Up
1/8" Thick



		1"	32	180	N42	2520N333	000000	000000

Magnets With Adhesive Back

Stick in place for fast, tool-free mounting where drilling isn’t practical. The adhesive holds tight without scratching surfaces.

							Each
	OD	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Adhesive Type		1-49	50-Up
1/8" Thick



		1"	32	180	N42	3M VHB (Very High Bond)	2520N353	000000	000000

Magnets With Unthreaded Hole

Mount with pins, bolts, or rivets. There's no need for threading.

									Each
	OD	Hole Dia.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Mounting Hole Style	For Screw Size		1-49	50-Up
1/8" Thick



		1"	0.19"	22	180	N42	Countersunk	No. 8	2520N343	000000	000000

Multipole Neodymium Rectangle Magnets

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.

									Each
	Wd.	Lg.	Max. Pull, lbf	Sets of Poles	Max. Temp., ° F	Magnet Grade	Direction of Magnetization		1-49	50-Up
1/8" Thick



		1/2"	1/2"	13	5	180	N42	Through Thickness	2494N19	00000	00000


		1/2"	1"	17	11	180	N42	Through Thickness	2494N21	0000	0000
		1"	1"	40	25	180	N42	Through Thickness	2494N18	00000	0000
		1 1/2"	1 1/2"	86	45	180	N42	Through Thickness	2494N24	00000	00000


		3/16" Thick



				1"	1 1/2"	65	35	180	N42	Through Thickness	2494N23	00000	00000

Magnets With Adhesive Back


	Magnetized Through Thickness	Adhesive on South Pole

Stick in place for fast, tool-free mounting where drilling isn’t practical. The adhesive holds tight without scratching surfaces.

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.

										Each
	Wd.	Lg.	Max. Pull, lbf	Sets of Poles	Max. Temp., ° F	Magnet Grade	Direction of Magnetization	Adhesive Type		1-49	50-Up
1/8" Thick



		1/2"	1/2"	13	5	180	N42	Through Thickness	3M VHB (Very High Bond)	2494N29	00000	00000


		1/2"	1"	17	11	180	N42	Through Thickness	3M VHB (Very High Bond)	2494N31	0000	0000
		1"	1"	40	25	180	N42	Through Thickness	3M VHB (Very High Bond)	2494N32	00000	00000
		1 1/2"	1 1/2"	86	45	180	N42	Through Thickness	3M VHB (Very High Bond)	2494N33	00000	00000


		3/16" Thick



				1"	1 1/2"	65	35	180	N42	Through Thickness	3M VHB (Very High Bond)	2494N34	00000	00000

Magnets With Unthreaded Hole


	Magnetized Through Thickness

Mount with pins, bolts, or rivets. There's no need for threading.

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.

												Each
	Wd.	Lg.	Hole Dia.	Max. Pull, lbf	Sets of Poles	Max. Temp., ° F	Magnet Grade	Direction of Magnetization	Mounting Hole Style	For Screw Size		1-49	50-Up
1/8" Thick



		1"	1"	0.0196"	26	21	180	N42	Through Thickness	Countersunk	No. 8	2494N53	000000	000000


		1"	1 1/2"	0.184"	45	31	180	N42	Through Thickness	Countersunk	No. 8	2494N44	00000	00000

Neodymium Disc Magnets

Unmatched strength in a compact shape. These magnets have the highest strength-to-size ratio of any magnet, delivering powerful pull force even in tight spaces. Their flat, round shape creates a strong, even pull across surfaces for reliable holding power. However, they may lose magnetic strength at high temperatures. Also known as rare earth magnets.

Magnets With Unthreaded Hole


Magnetized Through Thickness	Magnetized Through Thickness

Mount with pins, bolts, or rivets. There's no need for threading.

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.

Nickel Plated—With a nickel-plated finish, these magnets stand up to solvents, salt water, and chemicals better than uncoated neodymium. The plating may wear off over time, so these are not recommended for applications with a lot of friction or wear.

										Each
	OD	Hole Dia.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Direction of Magnetization	Mounting Hole Style	Finish		1-49	50-Up
1/8" Thick



		1/2"	0.136"	5.5	175	N42	Through Thickness	Countersunk	Nickel Plated	5862K922	00000	00000


		5/8"	0.17"	7.1	175	N42	Through Thickness	Countersunk	Nickel Plated	5862K923	0000	0000

Nonmarring Encased Neodymium Disc Magnets

These safeguarded 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 cracks and chips caused by drops and bumps. With the highest strength-to-size ratio of any magnet, these deliver powerful pull force even in tight spaces.

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.

Magnets With Unthreaded Hole

Mount with pins, bolts, or rivets. There's no need for threading.

Chrome-Plated Steel Case—The bright, shiny finish resists salt water and chemicals better than other finishes and is less likely to wear off.

											Each
	Thk.	OD	Hole Dia.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Cover Material	For Screw Size	Color		1-49	50-Up
Chrome-Plated Steel Case



		9/32"	1 29/64"	0.197"	20	175	N42	Rubber	No. 8	Silver	5679K49	00000	00000

Magnets With Threaded Hole


	Magnetized Through Thickness

Internally threaded for secure mounting with screws or bolts.

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.

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.

								Thread				Each
	Thk.	OD	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Direction of Magnetization	Cover Material	Size	Dp.	Color		1-49	50-Up
Nickel-Plated Steel Case



		15/64"	7/8"	11	170	N42	Through Thickness	Rubber	M4 × 0.7 mm	0.118"	Black	7132T27	000000	000000

Twist-Release Neodymium Disc Paired Magnets

Release magnetic holding force with a simple twist. These paired magnets lock together securely and disengage smoothly when rotated, eliminating the need for tools or latches. Use them in modular assemblies, sensor mounts, and quick-change systems where repeatable alignment and easy disassembly are key. With the highest strength-to-size ratio of any magnet, these deliver powerful pull force even in tight spaces. Also known as Polymagnets®.

Magnets


	120° Release Increments	180° Release Increments

						Each
	OD	Max. Pull, lbf	Release Increments	Max. Temp., ° F		1-49	50-Up
1/8" Thick



		1"	15	120°	180	2518N111	000000	000000


		1"	19	180°	180	2518N121	00000	00000

Magnets With Adhesive Back


	120° Release Increments	180° Release Increments

Stick in place for fast, tool-free mounting where drilling isn’t practical. The adhesive holds tight without scratching surfaces.

							Each
	OD	Max. Pull, lbf	Release Increments	Max. Temp., ° F	Adhesive Type		1-49	50-Up
1/8" Thick



		1"	15	120°	180	3M VHB (Very High Bond)	2518N151	000000	000000


		1"	19	180°	180	3M VHB (Very High Bond)	2518N161	00000	00000

Magnets With Unthreaded Hole


	120° Release Increments	180° Release Increments

Mount with pins, bolts, or rivets. There's no need for threading.

									Each
	OD	Hole Dia.	Max. Pull, lbf	Release Increments	Max. Temp., ° F	Mounting Hole Style	For Screw Size		1-49	50-Up
1/8" Thick



		1"	0.19"	12	120°	180	Countersunk	No. 8	2518N131	000000	000000


		1"	0.19"	14	180°	180	Countersunk	No. 8	2518N141	00000	00000

Encased Neodymium Rectangle Magnets with Polished Cover

Often chosen for their bright, polished appearance, these magnets offer more than good looks. All have a smooth cover that won’t trap dirt, grease, and grime. Plus, their case shields the magnet from cracks and chips caused by drops or bumps. With the highest strength-to-size ratio of any magnet, these deliver powerful pull force even in tight spaces. A striking plate is included.

Magnets With Unthreaded Hole

Image of Product. Front orientation. Magnets. Encased Neodymium Rectangle Magnets with Polished Cover.

Mount with pins, bolts, or rivets. There's no need for threading.

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

											Brass Cover		Chrome-Plated Brass Cover		Nickel-Plated Brass Cover
	Thk.	Wd.	Lg.	Hole Dia.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	No. of Mounting Holes	For Screw Size	Includes		Each		Each		Each
Plastic Case



		0.65"	0.433"	1 21/32"	0.11"	11	180	N42	3	No. 2	Strike Plate	3506K31	000000	3506K32	000000	3506K33	000000

Multiposition Neodymium Disc Paired Magnets

Snap and lock parts at multiple positions. These magnets have more than one fixed alignment. They’re magnetized in a circular pattern with alternating north and south poles, so they snap together at specific increments. Use them in fixtures, inspection stations, and laser-alignment systems to reposition parts without mechanical detents. With the highest strength-to-size ratio of any magnet, these deliver powerful pull force even in tight spaces. Also known as Polymagnets®.

Magnets


	90° Rotation Increments	120° Rotation Increments

							Each
	OD	Max. Pull, lbf	Rotation Increments	Max. Temp., ° F	Magnet Grade		1-49	50-Up
1/8" Thick



		1"	16	90°	180	N42	2519N222	000000	000000


		1"	20	120°	180	N42	2519N232	00000	00000

Magnets With Adhesive Back


	90° Rotation Increments	120° Rotation Increments

Stick in place for fast, tool-free mounting where drilling isn’t practical. The adhesive holds tight without scratching surfaces.

								Each
	OD	Max. Pull, lbf	Rotation Increments	Max. Temp., ° F	Magnet Grade	Adhesive Type		1-49	50-Up
1/8" Thick



		1"	16	90°	180	N42	3M VHB (Very High Bond)	2519N262	000000	000000


		1"	20	120°	180	N42	3M VHB (Very High Bond)	2519N272	00000	00000

Magnets With Unthreaded Hole


	90° Rotation Increments	120° Rotation Increments

Mount with pins, bolts, or rivets. There's no need for threading.

										Each
	OD	Hole Dia.	Max. Pull, lbf	Rotation Increments	Max. Temp., ° F	Magnet Grade	Mounting Hole Style	For Screw Size		1-49	50-Up
1/8" Thick



		1"	0.19"	12	90°	180	N42	Countersunk	No. 8	2519N242	000000	000000


		1"	0.19"	16	120°	180	N42	Countersunk	No. 8	2519N252	00000	00000