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20mm Neodymium Rare Earth Countersunk Cup/Pot Mounting Magnets N52 (8 Pack)

20 lbs Pull Force

20mm Neodymium Rare Earth Countersunk Cup/Pot Mounting Magnets N52 (8 Pack)

  • $ 23.79 USD $23.79


✓ In Stock - Ships Free Within 1 Business Day

Buy More and Save up to 35%
Quantity of Packs Price per Pack Discount
Buy 2 $22.61/pack 5% Off
Buy 3 $21.42/pack 10% Off
Buy 5 $20.23/pack 15% Off
Buy 10 $19.04/pack 20% Off
Buy 25 $17.85/pack 25% Off
Buy 50 $16.66/pack 30% Off
Buy 100 $15.47/pack 35% Off
Need more than 100 packs? Email us for a quote.


Magnet Specifications

Imperial Size 0.79 x 0.28 Inch (Diameter x Thickness)
Metric Size 20 x 7 mm (Diameter x Thickness)
Countersunk Hole Size 8.5 x 4.5 mm at 90°
Screw Size M4
Material Grade N52
Pull Force 20 lbs
Coating Nickel-Copper-Nickel (Ni-Cu-Ni)
Magnetization Direction Axially - Pair
Magnet Material Sintered Neodymium (NdFeB)
Tolerance +/- 0.004 Inches
Max Operating Temperature 80°C / 176°F
Flux Density (Br) 14,800 Gauss
Part Number 20MMPOTN52-8PK
Quantity Included 8 Countersunk Magnets

Produced in an ISO 9001 Facility
Manufactured to Meet RoHS & REACH Standards


The Benefits of Pot Magnets

Pot magnets, also known as cup or mounting magnets, are standard neodymium magnets that are encased in a protective steel housing on the N or S side. Engineered to provide superior sturdiness and impact resistance, this steel housing or “pot” is also ferromagnetic, thereby incrementally increasing the pull force of the magnet itself.

So, in addition to being exceptionally tough and resilient, neodymium pot magnets also provide a stronger pull force than a regular magnet with an equal N-rating and size. This is because the metal housing focuses the magnetic field in one direction, increasing the magnet's holding power.

Pot magnets give you much greater durability and pull force than regular neodymium magnets, and as a result, you get more magnet for your money.

Interested in more mounting magnets? Shop our full selection of pot magnets and channel magnets.


Sold in Matched North/South Pairs

Each set of countersunk magnets includes 4pcs with the countersunk hole on the north pole, and 4pcs with the countersunk hole on the south pole. This matched polarity design makes it easy to pair the magnets face-to-face for magnetic latches, closures, fasteners, cabinet doors, displays, fixtures, and other applications where two magnets need to attract each other.

Both north-pole and south-pole countersunk magnets will also attract to ferromagnetic materials such as steel, iron, and other magnetic metals, so they can be mounted to metal surfaces or used together as matching magnet pairs.

If you need the magnets in a different configuration, please contact us.


Torque Information for Countersunk Neodymium Magnets

Countersunk neodymium magnets are strong but brittle, and they can crack or break if screws are overtightened. Unlike steel washers or mounting plates, neodymium magnets do not flex under pressure, so too much screw torque can damage the magnet around the countersunk hole.

For best results, we recommend hand tightening whenever possible. If you use a drill or electric screwdriver, start on the lowest torque setting and slowly increase only as needed. Do not continue tightening once the magnet is securely seated.



Similar Part Numbers: SNA20, MCHN-20