McMaster-Carr logo
    Filter by
    System of Measurement
    Direction of Magnetization
    Maximum Pull
    Magnetic Pull Rating
    Magnet Grade
    Cover Material
    DFARS Specialty Metals
    Industrial Info Compare
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Backing Type
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Industrial Info Compare
    Sets of Poles
    Flux Density
    Minimum Temperature
    Maximum Energy Product
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    13 Products

    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 ThicknessRubberYellow2389N200000000000
     
    3/16" Thick
    1"8175N48Through ThicknessRubberYellow2389N40000000000
     

    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"PlasticMagneticYellow205897T1500000
    Markers
    Star
    Image of Product. Front orientation. Star. Magnetic Chart Shapes .
    Wd.
    Lg.
    Material
    Backing
    Type
    Color
    Pkg.
    Qty.
    Pkg.
    3/4"3/4"PlasticMagneticYellow205897T1600000
    Markers
    Triangle
    Image of Product. Front orientation. Triangle. Magnetic Chart Shapes .
    Wd.
    Lg.
    Material
    Backing
    Type
    Color
    Pkg.
    Qty.
    Pkg.
    3/4"3/4"PlasticMagneticYellow205897T1400000
    Markers
    Rectangle
    Image of Product. Front orientation. Rectangle. Magnetic Chart Shapes .
    Wd.
    Lg.
    Material
    Backing
    Type
    Color
    Each
    1/2"30"PlasticMagneticYellow5897T1100000
    1"30"PlasticMagneticYellow5897T120000
    2"30"PlasticMagneticYellow5897T180000
    3"30"PlasticMagneticYellow5897T1700000
    Markers

    Cut-to-Length Blank Signs

    Image of ProductInUse. Front orientation. Signs. Cut-to-Length Blank Signs.
    Write on these signs with a permanent marker, use adhesive-back characters (sold separately), or print on them with a silk screen or digital printer.
    Blank
    Wd.
    Thk.
    Roll Lg.,
    ft.
    Color
    Each
    Magnetic Back—Vinyl Plastic
    24 3/8"0.03"10Yellow5761K240000000
     

    Magnetic Stirring Bars

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

    Octagon

    Yellow

    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.
    Yellow
    OD
    Lg.
    Coating
    Material
    Each
    Octagon
    5/16"1 1/2"PTFE
    8571T412000000
     

    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. Yellow. Magnetic Particles for Flaw Detection.

    Powder

    Yellow

    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 LightYellow10Pail80Not Rated500ASTM E1444, ISO 9934MIL-STD-2132, MIL-STD-271, NAVSEA 250-1500-1, NAVSEA T9074-AS-GIB-010/2711394T1010000000
     
    back to top