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🧲 Elevate your projects with magnetic power that sticks — literally!
The N42 Neodymium Countersunk Magnet is a premium rare-earth magnet designed for both creative and industrial applications. Measuring 20mm in diameter and 3mm thick, it features a 3.6mm countersunk hole for secure screw mounting. With a powerful 4.5kg pull force and a corrosion-resistant triple-layer nickel-copper-nickel coating, it offers durable, reliable magnetic strength ideal for arts, crafts, DIY, and manufacturing projects.
| ASIN | B00TACK28Y |
| Best Sellers Rank | 36,692 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 311 in Rare Earth Magnets |
| Brand | FIRST4MAGNETS |
| Colour | Silver |
| Country Of Origin | China |
| Customer Reviews | 4.2 4.2 out of 5 stars (337) |
| Global Trade Identification Number | 05055641230274 |
| Included Components | Magnets |
| Item Dimensions L x W x Thickness | 20L x 20W x 3Th millimetres |
| Item Shape | Round |
| Item Thickness | 3 Millimetres |
| Item Type Name | 20mm dia x 3mm thick x 3.6mm c/s hole N42 Neodymium Magnet - 4.5kg Pull ( North ) ( Pack of 2 ) |
| Item Weight | 0.05 Kilograms |
| Manufacturer | Magnet Expert® |
| Manufacturer Part Number | F406N-2 |
| Material Type | Copper,Nickel |
| Model Number | F406N-2 |
| Number of Pieces | 2 |
| Pull Force | 4.5 Kilograms |
| Unit Count | 2.0 Count |
D**H
BE CAREFUL; THEY’RE STRONG!
UNBELIEVABLY GOOD!! These looked ideal to replace the dead magnets in my welding supports (Strong Hand Tools). The dimensions are the same; thought I would have to drill out the holes a little, but turned out that I didn’t, so perfect! They are incredibly strong magnets (stronger than the originals)! So much so, they are hard to get apart if you let them get together! 😂 Brilliantly packaged too. I will definitely buy more.
K**I
GENUINE N42 MAGNETS
Genuine N42 magnets. Unlike other magnets that I’ve purchased these are the genuine article. They have a bright chrome finish and are very powerful.
M**R
Good but easy to break
Great product, but by their nature are very fragile, so take care! I broke one as I was clumsy for a second. It leapt through the air and hit the other magnet and snapped in two. My fault.
S**Y
Very magnetic.
Bought two of these to use in a pressure relief valve in a cyclone/vacuum combination, but at the last minute decided on a steel receptacle that doesn't actually need a relief valve. However, they are very strong magnets for the money and I would think they would have served their purpose admirably had I used them. They do come with warnings on how to handle them, which given their strength was helpful.
I**N
Excellent magnets, fantastically packaged
These are BRILLIANT. Many many times stronger than a competitor's equivalent and wonderfully packaged. The reviews that mention their brittleness are most likely not experienced with rare earth magnets. The hole is convenient for fixing but you're absolutely not going to be able to screw them down hard with a metal screw, they'll just shatter. Treat them like ferrite and you won't go far wrong; be gently with them and use nylon screws.
C**R
Excellent magnets!
Very pleased as these have a strong pull, seem robust, arrived very well packaged and do exactly what i need (hold a pressure relief value in a workshop cyclone closed until needed). Mine arrived in a meaty metal casing, inside of a plastic holder with lots of warning info (see pics).
A**A
Don’t buy this.
I bought two sets. One set broke as soon as I inboxed it. In the first ten seconds. The other set I was hopeful was going to be stronger. I was sure it must have been a flaw in the first set. I took the other set to the kitchen to show it to my flatemate and try it on the cupboard door. I dropped it on the floor. One of the two disks broke in half. How are they going to resist to a door closing repeteadly maybe with speed due to the magnet attraction if it can’t survive a drop?
K**N
Better than screws or catches
I needed to fix the top onto a lampost I made and didn't want to drill holes for screws or catches that could leak and let water in, so I used these magnets. They did the job really well, they are neat and strong enough to hold the top on in any weather.
F**T
Très heureuse surprise, impeccable malgré la petite taille des aimants pour maintenir deux plages de tortues (il faut 4 aimants) que leurs poids et vivacité poussaient à dériver avec les aimants d'origine qui tombaient. Ceux là sont autrement plus puissants. Il faut pour ça des aimants orientés sud. Super emballage en plus, on a presque l'impression de manipuler de l'uranium enrichi tant c'est protégé mais il est vrai qu'il ne faut pas laisser ça entre toutes les mains
A**S
Son buenos un poco caros porque son pequeños
C**N
Magnete molto potente viste le dimensioni e lo spessore. Prodotto performante. Veloce la consegna.
S**H
Mit einer 6er Schraube und einem entsprechenden Dübel, die nicht in der Lieferung enthalten sind, wie man der Beschreibung entnehmen kann, habe ich bereits einen der Magneten an meiner Wand befestigt. Die Montage war sehr einfach, wenn man etwas handwerklich geschickt ist. Ich habe dabei stets darauf geachtet, nicht in die Nähe von Metallgegenständen zu kommen. Die Metallplatte, die ich schließlich an meiner Wand aufhängen wollte, hält hervorragend. Ein Magnet hat in meinem Fall völlig ausgereicht, wobei die Platte auch nicht allzu schwer ist. Die Lieferung erfolgte auch sehr zügig, sodass ich insgesamt sehr zufrieden bin.
J**Z
Son justo lo que esperaba, me han servido para poder sujetar una regleta de luz led y asi poder sujetarla a zonas metalicas