For the Memorial Day holiday, orders placed after 1:00PM EDT on Friday, 5/23/2025, will be shipped on Tuesday, 5/27/2025.
K&J magnetics neodymium magnet supplier - mascot joe magneato

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1/2 x 1/4 x 1/16 Inch Neodymium Rare Earth 3M Adhesive Backed Block Craft Magnet N42 (10 Pair Pack) PN: B841AD-P

b841ad-p-neodymium-rare-earth-3m-adhesive-backed-block-craft-magnet
b841ad-p-neodymium-rare-earth-3m-adhesive-backed-block-craft-magnet--thumbnail-1b841ad-p-neodymium-rare-earth-3m-adhesive-backed-block-craft-magnet--thumbnail-2
$12.00
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Quantity based discounts

Price ea.QtyDiscount
$12.00 1
$11.762-42%
$11.525-94%
$11.1610-247%
$10.9225-499%
$10.6850-9911%
$10.44100-24913%
$10.08250-49916%
$9.84500-99918%
$9.601000-249920%
Email us for even bigger discounts on higher order quantities
  • product description icon   Description
  • product technical icon   Technical
  • product download icon   Downloads
  • product video icon   Video
Magnetization direction These magnets are like our popular B841 block magnet, but with a pre-applied, 3M 467MP adhesive on one side.  The adhesive backer has a handy tab which makes removal much easier.  Sold in matched pairs, the adhesive is on the north pole of one magnet and on the south pole of the other.

These magnets are priced and sold in 10 packs, consisting of 10 pairs of magnets.  An order quantity of 1 is equal to 10 pairs of magnets, or 20 total magnets.  An order quantity of 2 provides 20 pairs of magnets, or 40 total magnets.

These easy to apply magnets are often used for magnetic closures on folders, book covers, boxes, presentation materials and other printed items. Also great for hanging art on a wall or hanging a poster!

To obtain maximum adhesion, surfaces should be flat, dry, and free of contaminants. Surface contact is essential to adhesive performance. See the material datasheet for further application instructions.

While the adhesive is strong, it may not stick well to certain surfaces.


Magnet pull force case 1 data chart icon link Pull Force, Case 1 vs. distance: Magnet to a Steel Plate.
Magnet pull force case 2 data chart icon link Pull Force, Case 2 vs. distance: Between 2 Steel Plates.
Magnet pull force case 3 data chart icon link Pull Force, Case 3 vs. distance: Magnet to Magnet.
Magnet pull force case 4 data chart icon link Pull Force, Case 4 vs. distance: Magnet to Magnet Repulsion.
Magnet field data chart icon link Click this link for a depiction of the magnetic field.
Bh demagnetization curves data chart icon link View B-H curves for this magnet.

Product spec sheet pdf download icon link Click this link to download a PDF Specification Sheet.
Product certificate of compliance pdf download icon link Click this link to download a Certificate of Compliance for this product.
Product rohs pdf download icon link Click this link to download a RoHS Statement of Compliance for this product.
Product sds safety data sheet pdf download icon link Click this link to download a Material Safety Data Sheet (MSDS) for this product.
Product conflict minerals reporting template pdf download icon link Click this link to download a Conflict Minerals Reporting Template (CMRT).
Product certificate of origin pdf download icon link Click this link to download a Certificate of Origin for this product.
REACH Click this link for a REACH compliance statement.
Product step drawing download icon link Click this link to download a .STEP file (3D model).
Product igs drawing download icon link Click this link to download an .IGS file (3D model).



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