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The rectangular neodymium magnet blocks with countersunk hole are give the name of rare earth neodymium(NdFeB) countersunk block(rectangular) magnets, the countersunk hole make the block magnets mountable.The neodymium countersunk block magnets can be screwed onto other surface, and used as magnetic holders.
From household applications to heavy-duty equipment, their magnetic versatility shines, making them a reliable choice for both indoor and outdoor use. Explore the possibilities with these powerful and adaptable rectangular neodymium magnet with countersunk hole.
Rare earth neodymium(NdFeB) countersunk block magnets are not rust-proof and easy to corrode, and their surface needs to be coated for durable, generally including zinc plating, nickel, environmental protection zinc, environmental protection nickel, nickel copper-nickel, environmental protection nickel copper-nickel, epoxy coating, etc.
Surface | Coating | Thickness (Microns) | Color | Resistance |
Passivation | 1 | Silver Grey | Temporary Protection | |
Nickel | Ni+Ni | 10-20 | Bright Silver | Excellent Against Humidity |
Ni+Cu+Ni | Good Against Salt Spray | |||
Zinc | Zn | 8-20 | Bright Blue | Excellent Against Salt Spray |
C-Zn | Shinny Color | Superior Against Humidity | ||
Tin | Ni+Cu+Sn | 15-20 | Silver | Superior Against Humidity |
Silver | Ni+Cu+Ag | 10-20 | Silver | Superior Against Humidity |
Gold | Ni+Cu+Au | 10-20 | Gold | Temporary Protection |
Copper | Ni+Cu | 10-20 | Gold | Excellent Against Humidity&Salt Spray |
Epoxy | Epoxy | 15-25 | Black,Red,Grey | Excellent Against Humidity,Salt Spray,Superior Against Solvents,Gases, Fungi and Bacteria,FDA Approved |
Ni+Cu+Epoxy | Excellent Against Humidity | |||
Zn+Epoxy | ||||
Parylene | Parylene | 5-20 | Grey | Excellent Against Humidity |
Chemical | Ni | 10-20 | Silver Grey | Excellent Against Humidity |
Neodymium countersunk block magnets, also known as rectangular neodymium magnet with countersunk hole, redefine magnetic mounting with their potent N35 Neodymium composition. Encased in a triple-layer Nickel-Copper-Nickel plated steel cup, these magnets boast exceptional strength.
Designed with a 90° countersunk hole, these magnets easily accommodate flat-head screws, offering a secure and flush fit. Ideal for signage, woodworking, cabinet making, and creating magnetic fasteners, latches, and closures, they find applications from hanging art on walls to securing tarps on boats and cars.
Caution in Installation for LongevityWhile these strong magnets with countersunk hole prove indispensable around homes, offices, and in various outdoor settings, it's crucial to handle them with care during installation. Over-tightening may lead to fragility. For enhanced durability, consider our channel magnets encased in steel.
Explore the possibilities with neodymium countersunk block magnets, where magnetic mastery meets versatility, providing reliable solutions for both everyday and heavy-duty applications.
Neodymium Material Grade | Maximum Working Temp. | Curie Temp. |
N（N35,N38,N40,N42,N45,N48,N50,N52） | 176°F (80°C) | 590°F (310°C) |
N-M（N35M,N38M,N40M,N42M,N45M,N48M,N50M,N52M） | 212°F (100°C) | 644°F (340°C) |
N-H（N35H,N38H,N40H,N42H,N45H,N48H,N50H） | 248°F (120°C) | 644°F (340°C) |
N-SH（N35SH,N38SH,N40H,N42SH,N45SH,N48SH） | 302°F (150°C) | 644°F (340°C) |
N-UH（N28UH,N30UH,N33UH,N35UH,N38UH,N40UH,N42UH） | 356°F (180°C) | 662°F (350°C) |
N-EH（N28EH,N30EH,N33EH,N35EH,N38EH,N40EH） | 392°F (200°C) | 662°F (350°C) |
N-AH（N28AH,N33AH,N35AH,N38AH） | 428°F (230°C) | 662°F (350°C) |
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