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Neodymium Block Magnet 20x10x5mm with two countersunk holes for M3 screws. This compact rare earth magnet is useful for compatible mounting, fixtures, removable panels, shop jigs, machine hardware, 3D printer assemblies, and small project builds where a strong screw-mounted magnet is required.
$4.29
20 in stock
This Neodymium Block Magnet 20x10x5mm is a compact rare earth magnet with two countersunk mounting holes for compatible M3 screws. Its small rectangular shape makes it useful for hardware projects, removable panels, shop jigs, fixtures, enclosures, 3D printer assemblies, machine hardware, and custom builds where a screw-mounted magnet is needed.
Neodymium magnets are known for strong magnetic holding force in a compact size. This block magnet measures 20mm long x 10mm wide x 5mm high, making it practical for small assemblies where space is limited but a secure magnetic hold is still required.
The magnet includes two countersunk holes designed for compatible M3 countersunk screws. This makes it easier to fasten the magnet to panels, brackets, fixtures, printed parts, machine components, cabinet-style closures, or other compatible mounting surfaces.
This magnet can be used in compatible shop projects, removable access panels, alignment fixtures, magnetic stops, small machine assemblies, 3D printer hardware, electronics enclosures, cabinet-style closures, prototypes, and workshop jigs. Compatibility depends on mounting surface, screw size, holding-force needs, magnet orientation, and the material being attracted.
The current dnb3D page lists this magnet as used on one Rat Rig V-Core 3 series bed arm assembly, where 3 pieces are required for the listed application. This is one possible use case, but the magnet should be selected by size, hole pattern, and holding requirements first.
The live product page lists the strength range as N32–N52. Because that range covers multiple magnet grades, confirm the actual grade if your application requires a specific pull force or holding strength. Avoid using this magnet in safety-critical holding applications unless the required grade, pull force, mounting method, and load conditions are fully verified.
Neodymium magnets can pinch skin, damage electronics, interfere with magnetic storage media, and pose a serious swallowing hazard. For general handling guidance, review this neodymium magnet safety reference before use.
If you are sourcing additional components for a machine, printer, enclosure, or shop project, browse our Hardware category or our 3D Printer Parts category for related fasteners, couplers, bearings, magnets, electronics, and motion-system parts.
Each order is handled by dnb3D in Marathon, Ontario, Canada. This compact screw-mounted neodymium block magnet is useful for compatible hardware projects, shop fixtures, removable panels, printer maintenance, machine assemblies, and small custom builds.
Below are the confirmed specifications for this Neodymium Block Magnet 20x10x5mm. Always verify magnet grade, screw fit, mounting method, and holding-force requirements before use.
| Product Name | Neodymium Block Magnet 20x10x5mm |
|---|---|
| Product Type | Rare earth block magnet / screw-mounted neodymium magnet |
| SKU | DB-0555-6744 |
| Material | Neodymium / rare earth magnet |
| Length | 20mm |
| Width | 10mm |
| Height | 5mm |
| Hole Style | Two countersunk holes |
| Screw Compatibility | M3 countersunk screws |
| Listed Strength Range | N32–N52 — verify actual magnet grade if required for your application |
| Common Applications | Compatible mounting projects, removable panels, fixtures, jigs, enclosures, cabinet-style closures, machine hardware, 3D printer assemblies, prototypes, and shop projects |
| Listed Printer Application | One listed Rat Rig V-Core 3 bed arm assembly application uses 3 pieces |
| Quantity Sold | 1 neodymium block magnet per quantity unless otherwise listed |
| Installation Warning | Confirm screw size, countersink fit, magnet orientation, holding-force requirements, mounting surface, and safety requirements before installation. Strong magnets can pinch skin and damage sensitive electronics. |
| Fulfillment | Hand-inspected and precision-shipped from dnb3D in Marathon, Ontario, Canada |
Before installing this Neodymium Block Magnet 20x10x5mm, confirm that your project requires a 20mm x 10mm x 5mm screw-mounted magnet with two countersunk holes for M3 screws. Check the mounting surface, screw length, countersink fit, magnet orientation, and required holding force before use.
Use compatible M3 countersunk screws and avoid overtightening. Excessive force can crack, chip, or damage the magnet. Make sure the screw heads sit correctly in the countersunk holes and that the magnet is mounted flat against the surface.
Neodymium magnets are strong and can pinch skin or snap together with force. Keep fingers clear when handling multiple magnets or installing near ferrous metal. Keep away from children, pets, pacemakers, magnetic storage media, credit cards, watches, phones, and sensitive electronics.
This magnet may be used in compatible fixtures, panels, enclosures, machine assemblies, 3D printer hardware, prototypes, shop jigs, and small custom projects. Compatibility depends on magnet grade, holding-force needs, mounting method, screw engagement, surface material, and load direction.
Store magnets with a spacer or protective packaging between pieces. Avoid dropping, striking, drilling, grinding, heating, or cutting the magnet. Neodymium magnets can chip or break if impacted and may lose strength if exposed to excessive heat.
Inspect the magnet after installation for cracks, chips, loose screws, corrosion, or reduced holding strength. Replace damaged magnets as needed, especially in applications where secure holding or repeatable positioning matters.
Each order is checked before fulfillment and precision-shipped from dnb3D in Marathon, Ontario, Canada.
At dnb3D, we don’t just ship boxes—we manufacture solutions. Operating our Industry 4.0 micro-factory in Marathon, Ontario, means your order is handled by the same people who design and test these components.
Ready to Ship (3D Printer Parts & Hardware): Finished, inspected, and on the shelf. Dispatched within 1 to 2 business days.
In-House Manufacturing (Laser, Plasma, 3D Prints): These items are manufactured “fresh” to order. Please allow 3 to 5 business days for precision cutting and finishing.
Custom Projects: Bespoke designs require a consultation and a locked-in timeline before production begins.
We ship nationwide across Canada and the USA. Centrally located on the North Shore of Lake Superior, we are uniquely positioned to get your products moving quickly to either coast.
We stand behind every weld, cut, and print. If a product doesn’t meet your expectations, contact the Hub within 30 days. If we wouldn’t put it in our own shop, we won’t let it sit in yours.
Standard Items: Contact us within 30 days for return authorization. Items must be in original, unused condition.
Custom/Personalized Orders: Digitally fabricated to your exact specs (names, custom dimensions, or unique finishes) are final sale once production begins.
Shipping Costs: Return shipping is the responsibility of the customer unless the item arrived damaged or defective.
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