McMaster-Carr logo
    Filter by
    System of Measurement
    Direction of Magnetization
    Magnet Grade
    Sets of Poles
    Thread Size
    Industrial Info Snippet
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Industrial Info Compare
    DFARS Specialty Metals
    Industrial Info Compare
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    60 Products
    About Magnets
    industrial info icon

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

    Alnico U Magnets

    Image of Product. 1. Front orientation. Magnets. Alnico U Magnets, Standard Magnets, Style 1, Magnetized Through Length.
    Image of Product. 2. Front orientation. Magnets. Alnico U Magnets, Magnets With Unthreaded Hole, Style 2, Magnetized Through Length.

    1

    2

    Image of Product. 3. Front orientation. Magnets. Alnico U Magnets, Magnets With Unthreaded Hole, Style 3, Magnetized Through Length.
    Image of Specification. Magnetized Through Length. Front orientation. Contains Annotated. Magnets. Alnico U Magnets, Standard Magnets.

    3

    Magnetized

    Through

    Length

    Hold or lift metal parts with confidence. The U-shape brings the north and south poles close together, creating a dense magnetic field for powerful pull force. These heat-resistant magnets won’t melt, deform, or lose magnetic strength in temperatures up to 970° F. Also known as horseshoe 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.
    Standard Magnets
    Image of Product. 1. Front orientation. Magnets. Alnico U Magnets, Standard Magnets, Style 1, Magnetized Through Length.
    Image of Specification. Magnetized Through Length. Front orientation. Contains Annotated. Magnets. Alnico U Magnets, Standard Magnets.

    1

    Magnetized

    Through

    Length

    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.
    Style
    Wd.
    Opening
    Wd.
    Wd. at
    Poles
    Lg.
    Max. Pull,
    lbf
    Max. Temp.,
    ° F
    Magnet
    Grade
    Direction of
    Magnetization
    Each
    1/4" Thick
    11 7/64"13/32"47/64"1 1/8"6970Alnico 5Through Length5842K11000000
     
    19/64" Thick
    11 1/8"1/4"29/32"1"2.2970Alnico 5Through Length5841K110000
    11 1/8"1/4"29/32"1"5970Alnico 5Through Length5841K2200000
     
    3/4" Thick
    13"1"2 1/2"2 1/2"60970Alnico 5Through Length5842K19000000
     
    1 1/4" Thick
    15"1 1/2"4"4 1/8"210970Alnico 5Through Length5842K22000000
     
    Magnets With Unthreaded Hole
    Image of Product. 2. Front orientation. Magnets. Alnico U Magnets, Magnets With Unthreaded Hole, Style 2, Magnetized Through Length.
    Image of Product. 3. Front orientation. Magnets. Alnico U Magnets, Magnets With Unthreaded Hole, Style 3, Magnetized Through Length.
    Image of Attribute. Front orientation. Contains Annotated. Magnetized Through Length. Alnico U Magnets, Magnets With Unthreaded Hole, Magnetized Through Length.

    2

    3

    Magnetized

    Through

    Length

    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.
    Style
    Wd.
    Opening
    Wd.
    Wd. at
    Poles
    Hole
    Dia.
    Lg.
    Max. Pull,
    lbf
    Max. Temp.,
    ° F
    Magnet
    Grade
    Direction of
    Magnetization
    Mounting
    Hole Style
    Each
    3/4" Thick
    31 1/8"9/16"1 1/16"3/16"3/4"13970Alnico 5Through LengthStraight5841K12000000
     
    25/32" Thick
    31 3/16"0.59"1 3/16"0.197"25/32"9970Alnico 5Through LengthStraight5841K3300000
     
    15/16" Thick
    22 3/16"1 3/16"2 3/16"3/16"1 13/16"32970Alnico 5Through LengthStraight5841K1500000
    22 7/16"1 3/16"2 7/16"1/4"2"35970Alnico 5Through LengthStraight5841K1600000
    22 5/8"1 3/8"2 5/8"1/4"2 1/4"40970Alnico 5Through LengthStraight5841K1700000
    23"1 1/2"3"1/4"2 1/2"50970Alnico 5Through LengthStraight5841K1800000
     
    63/64" Thick
    31 37/64"0.787"1 37/64"0.197"63/64"19970Alnico 5Through LengthStraight5841K4400000
     
    1" Thick
    23"1 3/4"3"3/16"1 11/16"55970Alnico 5Through LengthStraight5842K1800000
    31 1/2"3/4"1 3/8"3/16"1"22970Alnico 5Through LengthStraight5841K1300000
     
    1 1/8" Thick
    31 3/4"7/8"1 1/2"3/16"1 1/8"30970Alnico 5Through LengthStraight5841K1400000
     
    1 3/16" Thick
    31 49/64"29/32"1 49/64"0.197"1 3/16"25970Alnico 5Through LengthStraight5841K5500000
     
    1 7/8" Thick
    32 1/2"1 3/8"2 1/2"1/4"1 13/16"70970Alnico 5Through LengthStraight5841K19000000
     

    Nonmarring Neodymium Disc Magnets

    Protect mounting surfaces while maintaining a strong grip. The rubber coating on these magnets prevents scratches and adds friction for a secure hold. Use them to mount sensors and tools on machinery or apply temporary signs to control panels. 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.
    Standard Magnets
    Image of Product. Front orientation. Magnets. Nonmarring Neodymium Disc Magnets.
    Image of Specification. Magnetized Through Thickness. Front orientation. Contains Annotated. Magnets. Nonmarring Neodymium Disc 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
    Max. Temp.,
    ° F
    Magnet
    Grade
    Direction of
    Magnetization
    Cover
    Material
    Color
    1-49
    50-Up
    5/32" Thick
    3/4"5175N48Through ThicknessRubberRed2389N200000000000
     
    3/16" Thick
    1"8175N48Through ThicknessRubberRed2389N40000000000
     

    Encased Alnico Disc Magnets

    Heat-resistant magnets that last. A built-in case shields them from cracks and chips caused by drops and bumps. These magnets won’t melt, deform, or lose magnetic strength in temperatures up to 420° F.
    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
    Image of Product. Front orientation. Magnets. Encased Alnico Disc Magnets, Magnets With Unthreaded Hole.
    Steel Case—Maximizes holding power by concentrating magnetic force.
    OD
    Hole
    Dia.
    Max. Pull,
    lbf
    Max. Temp.,
    ° F
    Magnet
    Grade
    For Screw
    Size
    Each
    Steel Case
     
    19/64" Thick
    3/4"0.146"6420Alnico 5No. 6
    		56905K9600000
     
    11/32" Thick
    1 1/8"0.189"11420Alnico 5No. 8
    		56905K9700000
     
    13/32" Thick
    1 1/2"0.217"28420Alnico 5No. 10
    		56905K9800000
     

    Alnico Button Magnets

    Clamp, hold, and position metal parts. These magnets have both north and south poles on the same face for strong, flush contact. A slot and mounting hole help you mount them in jigs and fixtures. Although not as strong as U-shaped magnets, button magnets have a flat base for stable clamping. They won’t melt, deform, or lose magnetic strength in temperatures up to 970° F.
    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
    Image of Product. Front orientation. Magnets. Alnico Button Magnets, Magnets With Unthreaded Hole.
    OD
    Hole
    Dia.
    Max. Pull,
    lbf
    Max. Temp.,
    ° F
    Magnet
    Grade
    Mounting
    Hole Style
    Each
    3/8" Thick
    1/2"11/64"1.5970Alnico 5Straight5688K5100000
     
    1/2" Thick
    3/4"3/16"4970Alnico 5Straight5688K520000
     
    5/8" Thick
    1"3/16"7970Alnico 5Straight5688K530000
     
    3/4" Thick
    1 1/4"3/16"14970Alnico 5Straight5688K3400000
     
    7/8" Thick
    1 1/2"1/4"18970Alnico 5Straight5688K3500000
     
    1" Thick
    1 1/4"9/32"10970Alnico 5Straight5688K5400000
     

    Magnetic Pegboard Tool Holders

    Image of Product. Front orientation. Pegboard Tool Holders. Magnetic Pegboard Tool Holders.
    Image of Product. Back. Back orientation. Pegboard Tool Holders. Magnetic Pegboard Tool Holders.

    Back

    Hold steel tools, nails, nuts, screws, and other magnetic items on your pegboard.
    Red Plastic
    Lg.
    Wd.
    Projection
    Mounting Fasteners
    Included
    Mounting
    Location
    Pkg.
    Qty.
    Pkg.
    For 9/32" Diameter Peg Holes
    2 1/2"2 1/2"1"YesPegboard32130A13000000
     

    Magnetic Chart Shapes

    These shapes can be written on with a wet erase marker (sold separately) and wiped clean with a damp cloth.
    Arrow
    Image of Product. Front orientation. Arrow. Magnetic Chart Shapes .
    Wd.
    Lg.
    Material
    Backing
    Type
    Color
    Pkg.
    Qty.
    Pkg.
    3/4"3/4"PlasticMagneticRed205897T1500000
    Markers
    Pkg.
    Qty.
    Pkg.
    Black Wet Erase Marker 125897T51000000
    Star
    Image of Product. Front orientation. Star. Magnetic Chart Shapes .
    Wd.
    Lg.
    Material
    Backing
    Type
    Color
    Pkg.
    Qty.
    Pkg.
    3/4"3/4"PlasticMagneticRed205897T1600000
    Markers
    Pkg.
    Qty.
    Pkg.
    Black Wet Erase Marker 125897T51000000
    Triangle
    Image of Product. Front orientation. Triangle. Magnetic Chart Shapes .
    Wd.
    Lg.
    Material
    Backing
    Type
    Color
    Pkg.
    Qty.
    Pkg.
    3/4"3/4"PlasticMagneticRed205897T1400000
    Markers
    Pkg.
    Qty.
    Pkg.
    Black Wet Erase Marker 125897T51000000
    Round
    Image of Product. Front orientation. Round. Magnetic Chart Shapes .
    Dia.
    Material
    Backing
    Type
    Color
    Pkg.
    Qty.
    Pkg.
    3/4"PlasticMagneticRed205897T3100000
    Markers
    Pkg.
    Qty.
    Pkg.
    Black Wet Erase Marker 125897T51000000
    Square
    Image of Product. Front orientation. Square. Magnetic Chart Shapes .
    Wd.
    Lg.
    Material
    Backing
    Type
    Color
    Pkg.
    Qty.
    Pkg.
    3/4"3/4"PlasticMagneticRed205897T3200000
    Markers
    Pkg.
    Qty.
    Pkg.
    Black Wet Erase Marker 125897T51000000
    Rectangle
    Image of Product. Front orientation. Rectangle. Magnetic Chart Shapes .
    Wd.
    Lg.
    Material
    Backing
    Type
    Color
    Each
    1/2"30"PlasticMagneticRed5897T1100000
    1"30"PlasticMagneticRed5897T120000
    2"30"PlasticMagneticRed5897T180000
    3"30"PlasticMagneticRed5897T1700000
    Markers
    Pkg.
    Qty.
    Pkg.
    Black Wet Erase Marker 125897T51000000

    Threaded Encased Alnico Disc Magnets

    Thread long-lasting, heat-resistant magnets into position, then readjust if needed. They won't melt, deform, or lose magnetic strength in temperatures up to 420° F. A built-in case shields these from cracks and chips caused by drops and bumps.
    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 Threaded Hole
    Image of Product. Front orientation. Magnets. Disc, Alnico, Encased, Threaded-Hole Mount.
    Internally threaded for secure mounting with screws or bolts.
    Steel Case—Maximizes holding power by concentrating magnetic force.
    Thread
    OD
    Max. Pull,
    lbf
    Max. Temp.,
    ° F
    Magnet
    Grade
    Size
    Dp.
    Each
    Steel Case
     
    5/8" Thick
    11/16"5420Alnico 510-32
    		0.16"56905K8100000
     
    3/4" Thick
    13/16"8420Alnico 510-32
    		0.19"56905K8200000
     
    1" Thick
    1 1/16"13420Alnico 510-32
    		1/4"56905K8300000
     
    1 3/16" Thick
    1 3/8"32420Alnico 510-32
    		0.3"56905K8400000
     

    Magnetic Socket Organizers

    Image of Product. Front orientation. Socket Organizers. Magnetic Socket Organizers, Style A.
    Image of Product. Front orientation. Socket Organizers. Magnetic Socket Organizers, Style B.

    Style A

    Style B

    Magnets hold sockets securely in place.
    Style A—Style A have a magnetic base that mounts to steel surfaces.
    Style
    For No.
    of Sockets
    Includes
    Lg.
    Wd.
    Ht.
    Material
    Color
    Each
    For 1/4" Square Drives
    A2613 Holes each for Standard and Deep Sockets9 1/2"2 1/4"1 1/2"RubberRed52765A41000000
    B2613 Slots each for Standard and Deep Sockets11 3/8"4"3/4"PlasticRed55305A8100000
     
    For 3/8" Square Drives
    B2814 Slots each for Standard and Deep Sockets16 5/8"5"7/8"PlasticRed55305A8300000
     
    For 1/2" Square Drives
    B2211 Slots each for Standard and Deep sockets16 5/8"6 3/8"1 3/8"PlasticRed55305A8400000
     

    Encased Ceramic Rectangle Magnets

    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.
    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
    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.
    Style
    Thk.
    Wd.
    Lg.
    Hole
    Dia.
    Max. Pull,
    lbf
    Max. Temp.,
    ° F
    Magnet
    Grade
    Mounting
    Hole Style
    For Screw
    Size
    Each
    Nickel-Plated Steel Case
    39/16"1"4 1/2"9/32"40175C5Straight1/4"
    		57005K4100000
    39/16"1"6 1/2"9/32"55175C5Straight1/4"
    		57005K4200000
    39/16"1"12 1/2"9/32"120175C5Straight1/4"
    		57005K4300000
     

    Magnetic-Back Tool Holders

    Image of Product. Front orientation. Tool Holders. Magnetic-Back Tool Holders, Style R.
    Image of Product. Front orientation. Tool Holders. Magnetic-Back Tool Holders, Style S.

    Style R

    Style S

    Store tools such as brooms, screwdrivers, and flashlights with these holders that attach to magnetic surfaces.
    Style R—Style R use the tension created by the item’s weight to secure it.
    Style S—Style S have an adjustable hook and loop strap.
    Vinyl-Coated Steel—Nylon-coated and vinyl-coated holders protect items from scratches.
    Overall
    Style
    For Item
    Dia.
    Wd.
    Ht.
    Dp.
    Wt. Cap.,
    lb.
    Material
    Base Material
    Base
    Appearance
    Each
    Wall Mount
    R1"2"2 3/16"3"15Red Vinyl-Coated SteelZinc-Plated SteelDull1777A55000000
    S1/4" to 5"2 5/8"4 3/4"2 1/2"2Black PlasticRed Plastic—12205A250000
     

    Lockout Labels

    Prevent injuries from unexpected machine startups during maintenance and repair—these labels remind you to lock out equipment. Marking lockout points on electrical circuits, valves, plugs, and other energy sources helps you comply with OSHA 29 CFR 1910.147 standards.
    Labels with a header meet OSHA 29 CFR 1910.145 safety color standards for indicating hazards.
    Lockout Point (English)
    Image of Product. Front orientation. Labels. Lockout Labels , Lockout Point.
    Magnetic—Use labels with a magnetic back on equipment you clean often. They’re easier to remove and reapply than adhesive-back labels.
    Indicating Arrow—Separate indicating arrows from the rest of the label to point directly at the spot that needs a lockout.
    Ht.
    Wd.
    Thk.
    Mount
    Type
    Magnet
    Location
    Visibility
    Specs. Met
    Color
    Message
    Color
    Includes
    Performance
    Pkg.
    Qty.
    Pkg.
    Polypropylene
    3 1/2"5"0.004"MagneticBackStandardOSHA Compliant 29 CFR 1910.147
    		WhiteRedIndicating ArrowRemovable17967T89800000
     

    Electronic Polarity Testers

    Image of Product. Front orientation. Polarity Testers. Electronic Polarity Testers.
    Point this detector at your magnet and press the button. Red and green lights indicate north or south poles.
    Lg.
    Wd.
    Batteries
    Included
    Each
    5 1/2"1"Yes57255K71000000

    Magnetic Stirring Bars

    Image of Product. Front orientation. Stirring Bars. Magnetic Stirring Bars, Octagon, Red.

    Octagon

    Red

    Coated with PTFE, these stirring bars are corrosion and chemical resistant. Some are available in different colors for easy identification.
    Octagon—Octagonal stirring bars are the most commonly used shape. They have a large surface area to generate more turbulence than round bars, so they stir up particles for better mixing.
    Red
    OD
    Lg.
    Coating
    Material
    Each
    Octagon
    1/8"1/2"PTFE
    		8571T81100000
    5/16"1"PTFE
    		8571T3110000
    5/16"1 1/2"PTFE
    		8571T41100000
    5/16"2"PTFE
    		8571T51100000
     

    Magnetic Particles for Flaw Detection

    Image of Product. Front orientation. Magnetic Particles. Magnetic Particles for Flaw Detection, Powder.
    Image of Specification. Front orientation. Contains Border. Red. Magnetic Particles for Flaw Detection.

    Powder

    Red

    Reveal imperfections both at and slightly below the surface of your metal part, unlike other flaw detection methods. Use these particles with a magnetic yoke to check for faulty seams, welding defects, and fatigue cracks to make sure metal parts will be safe under high stress. The yoke creates a magnetic field that draws the particles towards flaws, making them easy to spot. To prevent issues with other inspections down the line, make sure to fully demagnetize your part to remove all the particles.
    Powder—Powder particles withstand higher temperatures than spray particles and are quick to use. They don’t need to dry, which means you can start testing immediately. Shake them out from a bottle or use a powder blower to apply them to your part. You can blow excess particles off even if your part is still magnetized. They come in different colors, so choose what will contrast best with your metal surface.
    Container
    Application
    Temp. Range
    For Use On
    Visibility
    Color
    Net Wt.,
    lb.
    Type
    Particle
    Size, μm
    Min.
    Max.,
    ° F
    Specs. Met
    Mil. Spec.
    Each
    Powder
    Cobalt, Iron, Nickel, Stainless Steel, SteelNatural LightRed10Pail80Not Rated600ASTM E1444, ISO 9934MIL-STD-2132, MIL-STD-271, NAVSEA 250-1500-1, NAVSEA T9074-AS-GIB-010/2711394T3730000000
     

    Liquid and Gas Storage Labels

    Clearly mark containers so you know what’s inside.
    Empty Cylinder—Do Not Use (English)
    Image of Product. Front orientation. Labels. Liquid and Gas Storage Labels , Empty Cylinder—Do Not Use.
    Magnetic—Labels with a magnetic back can be pulled off and used again, so you can tag containers that you frequently fill or empty.
    Ht.
    Wd.
    Thk.
    Mount
    Type
    Magnet
    Location
    Visibility
    Color
    Message
    Color
    Performance
    Pkg.
    Qty.
    Pkg.
    Vinyl Plastic
    5"7"0.02"MagneticBackStandardRedWhiteRemovable19025N34000000
     
    back to top