N38SH Magnets | McMaster-Carr

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Maximum Energy Product

302 kJ/m³

DFARS Specialty Metals

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REACH

RoHS

Export Control Classification Number (ECCN)

78 Products

About Magnets

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

Mount Type

Unthreaded Hole

Mount with pins, bolts, or rivets

17 products

Magnetic Pull Rating

Super Light

Often used as refrigerator magnets or inside electronics

9 products

Magnetic Pull Rating

Light

Hang small hand tools or use as pocket retrievers for small parts

49 products

Medium

Secure cabinets, hang large hand tools, or use in small electric motors

19 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 Thickness

N38SH—These magnets are less likely than other grades to lose magnetic strength when exposed to temperatures up to 300°F.

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



		0.1"	0.3	300	N38SH	Through Thickness	Nickel Plated	0000000	00000	00000


		1/8"	0.4	300	N38SH	Through Thickness	Nickel Plated	0000000	0000	0000


		1/16" Thick



				5/64"	0.4	300	N38SH	Through Thickness	Nickel Plated	0000000	0000	0000


				0.1"	0.5	300	N38SH	Through Thickness	Nickel Plated	0000000	0000	0000
				1/4"	1.3	300	N38SH	Through Thickness	Nickel Plated	0000000	0000	0000
				3/4"	3	300	N38SH	Through Thickness	Nickel Plated	00000000	0000	0000


				0.08" Thick



						0.32"	2.2	300	N38SH	Through Thickness	Nickel Plated	0000000	0000	0000


						1/8" Thick



								5/8"	10	300	N38SH	Through Thickness	Nickel Plated	0000000	0000	0000


								3/4"	8	300	N38SH	Through Thickness	Nickel Plated	00000000	00000	0000
								7/8"	9	300	N38SH	Through Thickness	Nickel Plated	00000000	00000	00000


								1/4" Thick



										5/8"	13	300	N38SH	Through Thickness	Nickel Plated	0000000	00000	00000


										7/8"	19	300	N38SH	Through Thickness	Nickel Plated	00000000	00000	00000


										1/2" Thick



												5/8"	27	300	N38SH	Through Thickness	Nickel Plated	0000000	00000	00000


												3/4" Thick



														1/2"	32	300	N38SH	Through Thickness	Nickel Plated	0000000	00000	0000

Magnets With Unthreaded Hole


Magnetized Through Thickness	Magnetized Through Thickness

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

N38SH—These magnets are less likely than other grades to lose magnetic strength when exposed to temperatures up to 300°F.

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
0.1" Thick



		1/4"	1/8"	1.3	300	N38SH	Through Thickness	Straight	Nickel Plated	0000000	00000	00000


		3/8"	1/8"	2.2	300	N38SH	Through Thickness	Straight	Nickel Plated	000000	0000	0000
		1/2"	1/8"	3	300	N38SH	Through Thickness	Straight	Nickel Plated	0000000	0000	0000
		1/2"	0.2"	3	300	N38SH	Through Thickness	Straight	Nickel Plated	0000000	0000	0000
		1"	1/8"	7	300	N38SH	Through Thickness	Straight	Nickel Plated	0000000	0000	0000
		1"	1/4"	6	300	N38SH	Through Thickness	Straight	Nickel Plated	0000000	00000	00000
		1"	1/2"	7	300	N38SH	Through Thickness	Straight	Nickel Plated	0000000	00000	00000


		1/4" Thick



				1/4"	1/8"	2.3	300	N38SH	Through Thickness	Straight	Nickel Plated	0000000	0000	0000


				3/8"	1/8"	5	300	N38SH	Through Thickness	Straight	Nickel Plated	0000000	0000	0000
				1/2"	1/8"	8	300	N38SH	Through Thickness	Straight	Nickel Plated	0000000	0000	0000
				1/2"	0.2"	8	300	N38SH	Through Thickness	Straight	Nickel Plated	0000000	00000	00000
				1"	1/8"	19	300	N38SH	Through Thickness	Straight	Nickel Plated	0000000	00000	00000
				1"	1/4"	16	300	N38SH	Through Thickness	Straight	Nickel Plated	0000000	00000	00000
				1"	1/2"	20	300	N38SH	Through Thickness	Straight	Nickel Plated	0000000	00000	00000


				1/2" Thick



						1/2"	1/8"	16	300	N38SH	Through Thickness	Straight	Nickel Plated	0000000	00000	00000


						1"	1/2"	21	300	N38SH	Through Thickness	Straight	Nickel Plated	0000000	00000	00000


						3/4" Thick



								1"	1/2"	32	300	N38SH	Through Thickness	Straight	Nickel Plated	000000	00000	00000

Neodymium Rectangle Magnets


	Magnetized Through Thickness

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.

N38SH—These magnets are less likely than other grades to lose magnetic strength when exposed to temperatures up to 300°F.

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.

Uncoated—Apply whatever finish best guards against rust and wear in your environment. If left uncoated, expect corrosion and less durability.

									Each
	Wd.	Lg.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Direction of Magnetization	Finish		1-49	50-Up
0.1" Thick



		1/4"	1/4"	1.7	300	N38SH	Through Thickness	Nickel Plated	0000000	00000	00000


		1/4"	1/4"	1.7	300	N38SH	Through Thickness	Uncoated	0000000	0000	0000
		1/4"	5/8"	3	300	N38SH	Through Thickness	Nickel Plated	0000000	0000	0000
		1/4"	5/8"	3	300	N38SH	Through Thickness	Uncoated	0000000	0000	0000
		1/4"	3/4"	3	300	N38SH	Through Thickness	Nickel Plated	0000000	0000	0000
		1/4"	3/4"	3	300	N38SH	Through Thickness	Uncoated	0000000	0000	0000
		1/4"	1"	4	300	N38SH	Through Thickness	Nickel Plated	0000000	0000	0000
		1/4"	1"	4	300	N38SH	Through Thickness	Uncoated	0000000	0000	0000
		1/4"	2"	6	300	N38SH	Through Thickness	Nickel Plated	0000000	00000	0000
		1/4"	2"	6	300	N38SH	Through Thickness	Uncoated	0000000	00000	0000
		3/8"	3/8"	3	300	N38SH	Through Thickness	Nickel Plated	0000000	0000	0000


		3/8"	3/8"	3	300	N38SH	Through Thickness	Uncoated	0000000	0000	0000
		1/2"	1/2"	4	300	N38SH	Through Thickness	Nickel Plated	0000000	0000	0000
		1/2"	1/2"	4	300	N38SH	Through Thickness	Uncoated	0000000	0000	0000
		5/8"	5/8"	5	300	N38SH	Through Thickness	Nickel Plated	0000000	0000	0000
		5/8"	5/8"	5	300	N38SH	Through Thickness	Uncoated	0000000	0000	0000
		3/4"	3/4"	6	300	N38SH	Through Thickness	Nickel Plated	0000000	00000	0000
		3/4"	3/4"	6	300	N38SH	Through Thickness	Uncoated	0000000	00000	0000
		1"	1"	8	300	N38SH	Through Thickness	Nickel Plated	0000000	00000	00000
		1"	1"	8	300	N38SH	Through Thickness	Uncoated	0000000	00000	00000


		1/8" Thick



				1/8"	1/8"	1.5	300	N38SH	Through Thickness	Nickel Plated	0000000	0000	0000


				1/4"	1/4"	2.7	300	N38SH	Through Thickness	Nickel Plated	0000000	0000	0000
				1/4"	1/4"	2.7	300	N38SH	Through Thickness	Uncoated	0000000	0000	0000
				3/8"	3/8"	4	300	N38SH	Through Thickness	Nickel Plated	0000000	0000	0000
				3/8"	3/8"	4	300	N38SH	Through Thickness	Uncoated	0000000	0000	0000
				5/8"	5/8"	6	300	N38SH	Through Thickness	Nickel Plated	0000000	00000	0000
				5/8"	5/8"	6	300	N38SH	Through Thickness	Uncoated	0000000	00000	0000
				3/4"	3/4"	8	300	N38SH	Through Thickness	Nickel Plated	0000000	00000	00000
				3/4"	3/4"	8	300	N38SH	Through Thickness	Uncoated	0000000	00000	0000


				0.21" Thick



						1/2"	1/2"	7	300	N38SH	Through Thickness	Nickel Plated	0000000	0000	0000


						1/2"	1/2"	7	300	N38SH	Through Thickness	Uncoated	0000000	0000	0000


						1/4" Thick



								1/4"	3/4"	9	300	N38SH	Through Thickness	Nickel Plated	0000000	00000	00000


								1/4"	3/4"	9	300	N38SH	Through Thickness	Uncoated	0000000	0000	0000
1/4"								1"	10	300	N38SH	Through Thickness	Nickel Plated	0000000	00000	0000
1/4"	1"							10	300	N38SH	Through Thickness	Uncoated	0000000	0000	0000
1/4"	2"							15	300	N38SH	Through Thickness	Nickel Plated	0000000	00000	00000
1/4"	2"							15	300	N38SH	Through Thickness	Uncoated	0000000	00000	00000
1/2"	1/2"							10	300	N38SH	Through Thickness	Nickel Plated	0000000	00000	0000
1/2"	1/2"							10	300	N38SH	Through Thickness	Uncoated	0000000	0000	0000


0.32" Thick



								3/4"	3/4"	16	300	N38SH	Through Thickness	Nickel Plated	0000000	00000	00000


								3/4"	3/4"	16	300	N38SH	Through Thickness	Uncoated	0000000	00000	00000


								3/8" Thick



										1"	1"	23	300	N38SH	Through Thickness	Nickel Plated	00000000	00000	00000


										1"	1"	23	300	N38SH	Through Thickness	Uncoated	00000000	00000	00000


										1/2" Thick



		2"	2"									65	300	N38SH	Through Thickness	Nickel Plated	0000000	000000	00000


		2"	2"									65	300	N38SH	Through Thickness	Uncoated	0000000	000000	00000


		1" Thick



												2"	2"	75	300	N38SH	Through Thickness	Nickel Plated	00000000	000000	000000


												2"	2"	75	300	N38SH	Through Thickness	Uncoated	00000000	000000	000000