Neodymium Countersunk Block Magnet - 40x10x4mm C/hole d4/8
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Neodymium Countersunk Block Magnet - 40mm x 10mm x 4mm | Countersunk Hole d4/8
Strong, compact, and easy to install, this Neodymium Countersunk Block Magnet measures 40mm x 10mm x 4mm and features a countersunk mounting hole with a 4mm internal diameter and 8mm countersunk diameter. Manufactured from powerful rare earth neodymium, this rectangular magnet is designed for secure screw fixing in applications where a permanent or semi-permanent magnetic mounting solution is required.
The countersunk hole allows the magnet to be fastened flush to surfaces using a countersunk screw, creating a neat, professional installation without protruding hardware. Magnetised through the 4mm thickness (axially magnetised), it delivers concentrated magnetic force across the broad rectangular face for strong holding and positioning performance.
Finished with a durable NiCuNi nickel coating, this magnet offers excellent resistance to corrosion and wear while maintaining a polished metallic appearance. Its slim rectangular profile makes it ideal for cabinetry, door catches, retail displays, workshop fixtures, signage, engineering projects, furniture construction, and custom fabrication applications.
Features & Benefits
- Powerful rare earth neodymium block magnet
- Dimensions: 40mm x 10mm x 4mm
- Countersunk mounting hole: 4mm hole / 8mm countersink
- Easy screw-fix installation
- Flush mounting design
- Durable NiCuNi nickel plated coating
- Magnetised through the thickness (axial magnetisation)
- Slim rectangular profile for versatile applications
Common Applications
- Magnetic door and cabinet catches
- Retail displays and signage
- Workshop jigs and fixtures
- Furniture and cabinetry construction
- Engineering and fabrication projects
- Product design and prototyping
- Magnetic mounting systems
- DIY and home improvement projects
Please Note
Neodymium magnets are extremely strong and should be handled carefully. Magnets may snap together unexpectedly and can chip or crack upon impact. When mounting with screws, avoid overtightening as excessive force may damage the magnet. Keep away from children, pacemakers, electronic devices, and magnetic storage media.
Typical Physical Properties
NB: Ranges are indicative for product category, please check individual products for specic values within that range.
Production Flow Diagram
Demagnetization Curves
Surface Treatment
The most common coating for Neodymium magnets is Nickel + Copper + Nickel (Ni + Cu + Ni). This coating offers the magnet relatively good protection from corrosion and passive applications. If the magnet will be exposed to moisture or liquid then consider the use of an organic coating such as Epoxy. A hard wearing coating, Epoxy is suited to applications where the magnet will come under some friction or knocking.
Range and Tolerance
Magnets are readily available in Blocks, Discs, Cylinders & Rings. We specializes in the supply of short-run prototype magnets including Arc Segments, various magnetic orientations etc. If you need a magnet size that we don't carry in stock, submit a Design-a-Magnet enquiry for a quote on your custom magnet design.
Magnetic Properties
Neodymium magnets are offered in several different grades. The first section N30-54 has an operating temperature of up to 80 degrees. Most of our stock only goes up to N38. The second section, denoted with the "M" prefix after the grade has an operating temperature 100 degrees. After this the grades are "H", "SH", "UH" & "EH". In order for the magnet to withstand a higher operating temperature, during production more of the raw material PrNd is incorporated as these elements have a naturally occurring resistance to high temperatures.
Returns Policy
If you are not entirely satisfied with your purchase, we're here to help.
We have a 30 Day Returns policy at Frenergy Magnets. You may return your item within 30 days of receiving it to receive a refund.
The product/s must be unused and in the same condition you received them in. Please contact us at info@frenergy.com.au to initiate the returns process.
The buyer is responsible for the cost of returning the order.
