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B&Q£12.99Visit shop - N42 Neodymium Magnet For Keeping Doors And Drawers Closed30mm X 21mm X 8mm With 2X 4.2mm C/sunk Holes17.1Kg PullSouth
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The FIRST4MAGNETS N42 Neodymium Magnet is a versatile hardware solution ideal for DIY enthusiasts, furniture makers, and home organizers looking to secure doors, drawers, or heavy artwork. Its primary benefit is a substantial 17.1kg pull force packed into a compact, screw-ready frame, though users must be aware that the high magnetic strength requires careful handling around sensitive electronics and bank cards.
| Brand | FIRST4MAGNETS |
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While they are designed for screws, industrial-grade epoxy can be used, though mechanical fastening via the holes is always more secure.
The triple-layer Ni-Cu-Ni coating is highly resistant to corrosion, but it should be kept dry to ensure the longest lifespan.
These N42 magnets should be kept below 80 degrees Celsius to prevent loss of magnetism.
No. Keep magnets at least 30cm away from electronics, credit cards, and pacemakers to prevent damage.
No, you will need to purchase M4 countersunk screws separately based on the material of your mounting surface.
Check the thickness of the target surface; if the metal is too thin or made of low-grade steel, the magnetic path will be inefficient.
Neodymium is a brittle material. Do not overtighten screws or use heavy-duty power tools; use manual screwdrivers instead.
The magnets are polarized with specific faces. Ensure you are matching the south pole of one to the north pole of another.
To install, align the 4.2mm countersunk holes with your mounting surface and secure them using M4 countersunk screws. Because the magnet features a specific south-pole orientation on the face, always verify your pairing magnet's polarity if using them for door closures to ensure attraction rather than repulsion. Avoid using power tools to tighten screws, as high-torque impact drivers can crack the brittle neodymium material. For maintenance, keep the surface clean from iron filings or debris to maintain full contact. While the nickel coating is protective, avoid exposing the magnets to high heat (above 80 degrees Celsius), which can permanently degrade the magnetic properties.
