Permanent Magnets | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	Thickness Thickness

	Width Width

	Length Length

	OD OD

	Mount Type Mount Type


Magnetic	Screw

Threaded Stud	Threaded Hole

Adhesive	Press Fit

	Shape Shape


Disc	Rectangle

U-Shape	Rotor

Button	Ball

U Channel	Square

	Maximum Pull Maximum Pull

	Direction of Magnetization Direction of Magnetization

	Through Thickness
	Through Length
	Through Diameter

	Pull Rating Pull Rating

Light Pull (2-10 lbs.)

Medium Pull (10-30 lbs.)

Super Light Pull (<2 lbs.)

Super Heavy Pull (>60 lbs.)

Heavy Pull (30-60 lbs.)

	Material Material

Neodymium

Alnico

Ceramic

Samarium-
Cobalt
(Rare Earth)

	Maximum Temperature Maximum Temperature

	Minimum Temperature Minimum Temperature

	Color Color

	Silver
	Gray
	Black
	Red
	Dark Brown
	White
	Green
	Yellow
	Blue
	Green/Red
	Red/White

	Sets of Poles Sets of Poles

1
2
3
4
4 poles per inch
5
5 poles per inch
6
6 poles per inch
7
8
8 poles per inch
10
10 poles per inch
11
11 poles per inch
12
12 poles per inch
13
14 poles per inch
16 poles per inch
24
25
31
35
36
37
45
86

	Magnet Grade Magnet Grade

	Flux Density Flux Density

	Maximum Energy Product Maximum Energy Product

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	Fabrication Fabrication

Sintered

Cast

Bonded

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Finish Finish

Nickel Plated

Uncoated

Zinc Plated

	Hole Diameter Hole Diameter

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1,529 Products

About Magnets

Neodymium Magnets

Nickel plating gives these magnets good corrosion resistance.

Uncoated Neodymium Magnets

Cover these unfinished magnets with your choice of coating to prevent corrosion.

Nonmarring Neodymium Magnets

In addition to protecting magnets and mounting surfaces, a rubber coating gives these magnets a slip-resistant surface.

High-Temperature Neodymium Magnets

Even at temperatures up to 300° F, these magnets have strong holding power.

Multi-Pole Neodymium Magnets

Many small poles give these magnets shallower, more concentrated magnetic fields that hold especially well on thin material. They resist temperatures up to 180° F.

Alnico Bar Magnets

Alnico Disc Magnets

Alnico Rotor Magnets

These magnets have a central hole for mounting on shafts. Use them in motors and turbine generators.

Alnico Bridge Magnets

Alnico Button Magnets

Alnico Horseshoe Magnets

Alnico U-Channel Magnets

Alnico U-Shape Magnets

Ceramic Magnets

Ceramic magnets resist demagnetization better than other magnets and are an economical choice. They resist temperatures up to 400° F.

Samarium-Cobalt Magnets

Strong and compact, these rare earth magnets resist temperatures up to 570° F.

Magnets with Unthreaded Hole

Neodymium Magnets with Unthreaded Hole

Made of neodymium, these rare earth magnets are the strongest for their size. Slide onto a rod or use a bolt or screw to install.

Multi-Pole Neodymium Magnets with Unthreaded Hole

Many small poles give these magnets shallower, more concentrated magnetic fields that hold especially well on thin material.

Alnico Magnets with Unthreaded Hole

Alnico magnets aren't as strong as rare earth magnets, but they withstand the highest temperatures—up to 970° F.

Ceramic Magnets with Unthreaded Hole

Ceramic magnets resist demagnetization better than other magnets and are an economical choice. They resist temperatures up to 400° F.

Stepped Magnets

Press these magnets into place, or use them like a tongue and groove to align components. The stepped profile allows you to install them without adhesives or screws.

Encased Magnets

Encased Neodymium Magnets with Threaded Stud

A steel case concentrates and focuses the magnetic field. It also protects the magnetic material.

Nonmarring Encased Neodymium
Magnets with Threaded Stud

A rubber cover protects the magnet and mounting surface.

Encased Ceramic Magnets with Threaded Stud

Ceramic magnets resist demagnetization better than other magnets and are an economical choice. They resist temperatures up to 140° F.

Encased Neodymium Magnets with Threaded Hole

A metal case protects the magnetic material.

Nonmarring Encased Neodymium
Magnets with Threaded Hole

A rubber cover protects the mounting surface as well as the magnet.

Encased Alnico Magnets with Threaded Hole

Alnico magnets resist temperatures up to 420° F.

Encased Ceramic Magnets with Threaded Hole

These ceramic magnets resist demagnetization better than other magnets, and have a metal case to protect the magnetic material. They resist temperatures up to 175° or 245° F.

Encased Samarium-Cobalt Magnets

Rare earth samarium-cobalt offers a balance of strength and temperature resistance.

Encased Ceramic Magnets

A case protects the magnetic material.

Nonmarring Encased Ceramic Magnets

A plastic case protects the mounting surface as well as the magnet.

Encased Ceramic Magnets with Unthreaded Hole

Ceramic magnets resist demagnetization better than other magnets and are an economical choice. They resist temperatures up to 480° F.

Encased Neodymium Magnets with Unthreaded Hole

A metal case protects the magnetic material.

Nonmarring Encased Neodymium
Magnets with Unthreaded Hole

A rubber cover protects the mounting surface as well as the magnet.

Encased Neodymium Magnets with Polished Cover

A smooth metal cover gives these magnets a finished appearance.

Encased Alnico Magnets with Unthreaded Hole

Alnico magnets resist temperatures up to 420° F.

Press-Fit Encased Magnets

Press these magnets into a drilled hole so they are flush against the surface.

Encased Magnets with Mounting Plate

To add a magnetic surface anywhere, install the mounting plate, then screw on the magnet.

Easy On/Off Magnets

Turn the handle to switch these magnets on and off.

Easy On/Off Magnets with Mounting Flange

Use mounting holes to install these magnets where they are needed; switch them on and off with the handle.

Flexible Magnets

These magnets are made of corrosion-resistant ceramic and bonded with rubber for flexibility.

Flexible Disc Magnets

These discs are made of corrosion-resistant ceramic and bonded with rubber for flexibility.

Conformable Magnets for Irregular Surfaces

Stretch these magnetic strips over corners and irregular surfaces.

High-Temperature Flexible Magnets

Unlike other flexible magnets, these resist demagnetizing at temps up to 250° F.

Machinable Magnets

These magnets are bonded with epoxy resin, so they can be machined with carbide tooling.

Machinable Magnets with Unthreaded Hole

Slide these magnets onto a rod or install with a bolt. They are bonded with epoxy resin, so they can be machined with carbide tooling.

Paired Magnets

Multi-Position Paired Magnets

These magnet pairs rotate into multiple positions to orient displays, sensors, and other devices. They have a firm hold at specific angles, but turn easily without detaching.

Center-Aligning Paired Magnets

Attach parts in the same place every time with these magnet pairs that center as they pull together.

Twist-Release Paired Magnets

These magnet pairs attract for a strong hold but repel when twisted for an easy release. Use them on doors, covers, and other parts that need to be repeatedly installed and removed.

Lifting Magnets

Switch-Off Lifting Magnets

Pull the on/off handle to engage and release the magnet.

Pry-Off Lifting Magnets

These magnets hold a load until you pull the handle and pry the magnet off.

Communication

Blank Signs

Fill in the blank with your own custom warnings, labels, and messages. You can write on these signs with markers, add color with paint, or stick on adhesive-back characters. Many even work with printers.

Cut-to-Length Blank Signs

Unroll the length you need and cut with scissors.

Magnetic Dry-Erase Labels

Change your message and its location without using a new label. These labels have a surface you can write on with a dry-erase marker.

Dry Erase Sheets

Transform flat metal surfaces into a dry erase board.

Magnet-Receptive Sheets

Made of rubber and iron oxide, these sheets can be cut with scissors to create custom-shaped nonmetallic, nonmagnetic surface that magnets will stick to.

Magnetic Quick-Release Pins

A strong magnet in the head holds these pins in place on steel and other ferrous metals. Use them for light duty applications and blind holes.

About Magnets

Magnets

Neodymium Magnets

Uncoated Neodymium Magnets

Nonmarring Neodymium Magnets

High-Temperature Neodymium Magnets

Multi-Pole Neodymium Magnets

Alnico Bar Magnets

Alnico Disc Magnets

Alnico Rotor Magnets

Alnico Bridge Magnets

Alnico Button Magnets

Alnico Horseshoe Magnets

Alnico U-Channel Magnets

Alnico U-Shape Magnets

Ceramic Magnets

Samarium-Cobalt Magnets

Magnets with Unthreaded Hole

Neodymium Magnets with Unthreaded Hole

Multi-Pole Neodymium Magnets with Unthreaded Hole

Alnico Magnets with Unthreaded Hole