N45 Magnets | McMaster-Carr

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132 Products

About Magnets

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

Mount Type

Adhesive Back

Stick in place for fast, tool-free mounting

6 products

Unthreaded Hole

Mount with pins, bolts, or rivets

93 products

Mount Type

Press Fit

Press into drilled holes

10 products

Construction

Encased

Won’t crack or chip when bumped or dropped

3 products

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.

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


	Magnetized Through Diameter

Magnetized Through Diameter—Magnetized outward from the center, these magnets generate a circular magnetic field. This makes them best for sensors and motors where rotational symmetry and precise angles are key.

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	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Direction of Magnetization	Finish		1-49	50-Up
1/8" Thick



		1/16"	0.1	175	N45	Through Diameter	Nickel Plated	00000000	00000	00000


		1/8"	0.7	175	N45	Through Diameter	Nickel Plated	00000000	0000	0000
		1/4"	2.5	175	N45	Through Diameter	Nickel Plated	00000000	0000	0000
		3/8"	4.7	175	N45	Through Diameter	Nickel Plated	00000000	0000	0000
		1/2"	7	175	N45	Through Diameter	Nickel Plated	00000000	0000	0000
		5/8"	9	175	N45	Through Diameter	Nickel Plated	00000000	0000	0000
		3/4"	11	175	N45	Through Diameter	Nickel Plated	00000000	0000	0000
		7/8"	12	175	N45	Through Diameter	Nickel Plated	00000000	00000	0000
		1"	14	175	N45	Through Diameter	Nickel Plated	00000000	00000	0000


		1/4" Thick



				1/16"	0.2	175	N45	Through Diameter	Nickel Plated	00000000	0000	0000


				1/8"	0.9	175	N45	Through Diameter	Nickel Plated	00000000	0000	0000
				1/4"	3.6	175	N45	Through Diameter	Nickel Plated	00000000	0000	0000
				3/8"	7	175	N45	Through Diameter	Nickel Plated	00000000	0000	0000
				1/2"	12	175	N45	Through Diameter	Nickel Plated	00000000	0000	0000
				5/8"	16	175	N45	Through Diameter	Nickel Plated	00000000	00000	0000
				3/4"	20	175	N45	Through Diameter	Nickel Plated	00000000	00000	0000
				7/8"	25	175	N45	Through Diameter	Nickel Plated	00000000	00000	00000
				1"	29	175	N45	Through Diameter	Nickel Plated	00000000	00000	00000

Magnets With Adhesive Back


	Magnetized Through Thickness	Adhesive on North Pole	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.

								North Pole			South Pole
	OD	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Direction of Magnetization	Adhesive Type	Finish		1-49	50-Up		1-49	50-Up
1/16" Thick



		1/2"	3.4	170	N45	Through Thickness	3M VHB (Very High Bond)	Nickel Plated	0000000	00000	00000	0000000	00000	00000


		3/4"	4.5	170	N45	Through Thickness	3M VHB (Very High Bond)	Nickel Plated	0000000	0000	0000	0000000	0000	0000

Magnets With Unthreaded Hole

Magnetized Through

Thickness

Magnetized

Through

Thickness

Magnetized

Through

Diameter

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



		1/4"	0.103"	3.5	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000


		1/4"	0.107"	1.2	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	0000	0000
		1/4"	1/8"	1.5	175	N45	Through Thickness	Straight	Nickel Plated	00000000	0000	0000
		1/4"	1/8"	2.6	175	N45	Through Diameter	Straight	Nickel Plated	00000000	0000	0000
		3/8"	1/8"	3.8	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	0000	0000
		3/8"	1/8"	4	175	N45	Through Thickness	Straight	Nickel Plated	00000000	0000	0000
		3/8"	1/8"	4.2	175	N45	Through Diameter	Straight	Nickel Plated	00000000	0000	0000
		1/2"	1/8"	6	175	N45	Through Thickness	Straight	Nickel Plated	00000000	0000	0000
		1/2"	1/8"	6	175	N45	Through Diameter	Straight	Nickel Plated	00000000	0000	0000
		1/2"	0.153"	6	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	0000	0000
		5/8"	1/8"	8	175	N45	Through Thickness	Straight	Nickel Plated	00000000	0000	0000


		5/8"	1/8"	8	175	N45	Through Diameter	Straight	Nickel Plated	00000000	0000	0000
		5/8"	0.134"	6.8	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	0000	0000
		3/4"	1/8"	10	175	N45	Through Thickness	Straight	Nickel Plated	00000000	0000	0000
		3/4"	1/8"	10	175	N45	Through Diameter	Straight	Nickel Plated	00000000	0000	0000
		3/4"	0.283"	9	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	0000	0000
		7/8"	1/8"	11.5	175	N45	Through Thickness	Straight	Nickel Plated	00000000	0000	0000
		7/8"	1/8"	11.5	175	N45	Through Diameter	Straight	Nickel Plated	00000000	00000	0000
		1"	1/4"	13	175	N45	Through Thickness	Straight	Nickel Plated	00000000	00000	0000
		1"	1/4"	13	175	N45	Through Diameter	Straight	Nickel Plated	00000000	00000	0000


		3/16" Thick



				3/4"	0.154"	14.7	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	0000	0000


				1"	0.211"	22	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000
				1"	0.275"	22	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000


				1/4" Thick



						1/4"	1/8"	2.5	175	N45	Through Thickness	Straight	Nickel Plated	00000000	0000	0000


						1/4"	1/8"	2.5	175	N45	Through Diameter	Straight	Nickel Plated	00000000	0000	0000
						3/8"	1/8"	6	175	N45	Through Thickness	Straight	Nickel Plated	00000000	0000	0000
						3/8"	1/8"	6.5	175	N45	Through Diameter	Straight	Nickel Plated	00000000	0000	0000
						1/2"	1/8"	11	175	N45	Through Thickness	Straight	Nickel Plated	00000000	0000	0000
						1/2"	1/8"	11	175	N45	Through Diameter	Straight	Nickel Plated	00000000	0000	0000
						1/2"	0.135"	11	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	0000	0000
						5/8"	1/8"	15.5	175	N45	Through Thickness	Straight	Nickel Plated	00000000	0000	0000
						5/8"	1/8"	15.5	175	N45	Through Diameter	Straight	Nickel Plated	00000000	00000	0000
						3/4"	1/8"	19.5	175	N45	Through Thickness	Straight	Nickel Plated	00000000	0000	0000
						3/4"	1/8"	19.5	175	N45	Through Diameter	Straight	Nickel Plated	00000000	00000	0000


						3/4"	0.166"	18	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	0000	0000
						7/8"	1/8"	24	175	N45	Through Thickness	Straight	Nickel Plated	00000000	00000	0000
						7/8"	1/8"	24	175	N45	Through Diameter	Straight	Nickel Plated	00000000	00000	00000
						7/8"	0.177"	22	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	0000
						1"	0.217"	27	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000
1"						1/4"	27.5	175	N45	Through Thickness	Straight	Nickel Plated	00000000	00000	00000
1"	1/4"					27.5	175	N45	Through Diameter	Straight	Nickel Plated	00000000	00000	00000
1 1/4"	0.194"					30.5	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000
1 1/4"	0.217"					30	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000


3/8" Thick



						1 1/2"	0.211"	56	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000


						1 1/2"	0.266"	55.2	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000


						1/2" Thick



								1/2"	1/8"	14.4	175	N45	Through Thickness	Straight	Nickel Plated	00000000	0000	0000


								1/2"	1/8"	14.5	175	N45	Through Diameter	Straight	Nickel Plated	00000000	00000	0000
								3/4"	0.213"	23	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000
								1"	0.212"	43	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000
								2"	0.281"	96.5	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000


								1" Thick



			1/2"						1/4"	13	175	N45	Through Thickness	Straight	Nickel Plated	00000000	00000	00000


			1/2"						1/4"	13	175	N45	Through Diameter	Straight	Nickel Plated	00000000	00000	00000


			1 1/2" Thick



				1/2"						1/4"	13.5	175	N45	Through Thickness	Straight	Nickel Plated	00000000	00000	00000


				1/2"	1/4"					13.5	175	N45	Through Diameter	Straight	Nickel Plated	00000000	00000	00000


				2" Thick



										1/2"	1/4"	13.6	175	N45	Through Diameter	Straight	Nickel Plated	00000000	00000	00000


										1/2"	1/4"	13.7	175	N45	Through Thickness	Straight	Nickel Plated	00000000	00000	00000

Neodymium Rectangle 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, rectangular shape creates a strong, even pull across surfaces and fits easily into slots or grooves. However, they may lose magnetic strength at high temperatures. Also known as rare earth 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	Max. Temp., ° F	Magnet Grade	Direction of Magnetization	Finish		1-49	50-Up
1/4" Thick



		1/4"	1/4"	4.4	175	N45	Through Thickness	Nickel Plated	0000000	00000	00000


		1/2" Thick



				1/2"	1/2"	20	175	N45	Through Thickness	Nickel Plated	0000000	00000	00000


				1" Thick



						1"	1"	77	175	N45	Through Thickness	Nickel Plated	0000000	00000	00000

Magnets With Adhesive Back


	Magnetized Through Thickness

Adhesive on

North Pole

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.

									North Pole			South Pole
	Wd.	Lg.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Direction of Magnetization	Adhesive Type	Finish		1-49	50-Up		1-49	50-Up
0.055" Thick



		1/2"	1"	4.1	170	N45	Through Thickness	3M VHB (Very High Bond)	Nickel Plated	0000000	00000	00000	0000000	00000	00000

Magnets With Unthreaded Hole


	Magnetized Through Thickness	Magnetized Through Length

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.

Magnetized Through Length—Magnetized end to end, these magnets channel magnetic energy on the longest axis. This orientation creates deep field penetration and directional pull.

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



		1/2"	0.149"	1/2"	8	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000


		1/2"	0.17"	3/4"	7.4	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	0000	0000
		1/2"	0.17"	1"	9.2	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	0000	0000
		1/2"	0.202"	2"	13	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000
		1/2"	0.203"	1"	10	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	0000	0000
		3/4"	0.205"	3/4"	12	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	0000	0000
		1"	0.275"	1"	16	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000


		3/16" Thick



				1/2"	0.135"	1/2"	9	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	0000	0000


				3/4"	0.167"	3/4"	15	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	0000
				1"	0.2"	1"	20	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000


				1/4" Thick



						1/4"	0.06"	1/4"	4.4	175	N45	Through Thickness	Straight	Nickel Plated	00000000	0000	0000


						1/4"	0.06"	1/4"	4.4	175	N45	Through Length	Straight	Nickel Plated	00000000	0000	0000
						1/2"	0.166"	1"	19	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000
						1/2"	0.167"	1/2"	10	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	0000	0000
						1/2"	0.168"	2"	30	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000
						1/2"	0.17"	3/4"	14	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	0000	0000
						1/2"	0.17"	1 1/2"	24	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	0000
						1/2"	0.17"	2"	28	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000
						3/4"	0.168"	3/4"	21	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000
						1"	0.189"	1"	40	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000
						1"	0.194"	2"	34.3	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000


						1/2" Thick



								1/2"	0.16"	1/2"	15	175	N45	Through Thickness	Counterbored	Nickel Plated	00000000	00000	00000


								1/2"	0.163"	1"	29	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000
								1/2"	0.166"	2"	52	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000
								1/2"	3/16"	1/2"	20	175	N45	Through Thickness	Straight	Nickel Plated	00000000	00000	00000
								1/2"	3/16"	1/2"	20	175	N45	Through Length	Straight	Nickel Plated	00000000	00000	0000
								3/4"	0.166"	3/4"	25	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000
								1"	0.194"	1"	53	175	N45	Through Thickness	Counterbored	Nickel Plated	00000000	00000	00000
								1"	0.194"	2"	74	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000
								1"	0.214"	1"	53	175	N45	Through Thickness	Countersunk	Nickel Plated	00000000	00000	00000


								3/4" Thick



3/4"	3/16"									3/4"	43	175	N45	Through Thickness	Straight	Nickel Plated	00000000	00000	00000


3/4"	3/16"									3/4"	43	175	N45	Through Length	Straight	Nickel Plated	00000000	00000	00000

Easy On/Off Neodymium Magnets

Turn magnetic force on or off with a simple twist. These magnets grip firmly and release quickly, making them best for fixtures, positioning tasks, and quick-change setups. With the highest strength-to-size ratio of any magnet, these deliver a powerful and even pull force across surfaces.

Magnets

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.

	Lg.	Ht.	Overall Ht.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade		Each
Nickel-Plated Steel Case



	7/8"	1 1/8"	1 1/4"	2 1/8"	95	180	N45	0000000	000000


	1 1/4"	1 5/8"	1 1/4"	2 1/8"	150	180	N45	0000000	00000

Magnets With Unthreaded Hole

Handle

Actuator

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

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.

									Mounting					Handle Actuator
	Wd.	Lg.	Ht.	Overall Ht.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Flange Material	Hole Dia.	Flange Lg.	Flange Wd.	Flange Ht.	No. of Mounting Holes		Each
Nickel-Plated Steel Case



		7/8"	1 1/8"	1 1/4"	2 1/4"	95	180	N45	Aluminum	3/16"	2 1/4"	7/8"	1/2"	2	0000000	000000


		1 1/4"	1 5/8"	1 1/4"	2 1/4"	150	180	N45	Aluminum	3/16"	2 5/8"	1 1/4"	1/2"	2	0000000	00000

Stepped Neodymium Disc Magnets

Prevent rotation and misalignment in your assemblies. The stepped profile locks components together with tongue-and-groove alignment for a secure, twist-proof hold. With the highest strength-to-size ratio of any magnet, these deliver powerful pull force even in tight spaces.

Press Fit Magnets


Stepped In	Stepped Out	Magnetized Through Thickness

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

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.

		Stepped							Each
	OD	Dp.	Thk.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Direction of Magnetization		1-49	50-Up
Stepped In







				1/4" Thick

				1/2"	0.031"	0.094"	11	175	N45	Through Thickness	00000000	00000	00000




						3/8" Thick

						3/4"	1/16"	1/8"	23	175	N45	Through Thickness	00000000	00000	00000


						Stepped Out







										1/4" Thick

										1/2"	0.031"	0.094"	13	175	N45	Through Thickness	00000000	0000	0000




												3/8" Thick

												3/4"	1/16"	0.188"	31	175	N45	Through Thickness	0000000	00000	00000

Stepped Neodymium Rectangle Magnets

Press Fit Magnets


Stepped In	Stepped Out	Magnetized Through Thickness

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

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.

			Stepped							Each
	Wd.	Lg.	Dp.	Thk.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Direction of Magnetization		1-49	50-Up
Stepped In







				1/4" Thick

				1/2"	1/2"	0.047"	0.094"	15	175	N45	Through Thickness	00000000	00000	00000


				1/2"	3/4"	0.047"	0.094"	13	175	N45	Through Thickness	00000000	00000	0000
				1/2"	1"	0.047"	0.094"	21	175	N45	Through Thickness	00000000	00000	00000


				Stepped Out







								1/4" Thick

								1/2"	1/2"	0.047"	0.094"	13	175	N45	Through Thickness	00000000	0000	0000


								1/2"	3/4"	0.047"	0.094"	17	175	N45	Through Thickness	00000000	00000	0000
								1/2"	1"	0.047"	0.094"	20	175	N45	Through Thickness	00000000	00000	00000

Nonmarring Encased Neodymium Rectangle 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.	Hole Dia.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Cover Material	For Screw Size	Color		1-49	50-Up
Chrome-Plated Steel Case



		1/4"	0.129"	14	175	N45	Rubber	No. 5	Black	0000000	00000	00000


		1/4"	0.15"	27	175	N45	Rubber	No. 6	Black	0000000	00000	00000
		1/4"	0.177"	41	175	N45	Rubber	No. 8	Black	0000000	00000	00000