This is a black square magnet with countersunk hole, it is made of rare earth neodymium, the specific size is 25mm in length and width, 13mm in thickness and the direction of magnetizing is thickness. This sample is plated black epoxy, it can extend the service life of the magnet, so that the magnet can prevent corrosion and oxidation. This magnet has a M4 contersunk hole at the center,  this collocation is common when assembling certain large objects.

The choice of epoxy coating for neodymium magnets provides good corrosion protection, preventing oxidation and corrosion when the neodymium magnet comes into contact with air, water or other chemicals, which is particularly important for outdoor applications, wet environments or magnets exposed to chemicals.

If you have any requirment about magnet with M4 hole,please contact us and we can custom the quantity and place of hole for you!

Other size/shaped/material magnet with hole:

45mm square neodymium magnet with screw holes 45 x 45 x 9 mm

Strong rectangular magnet with two screw holes 30 x 12 x 3 mm

50mm wide ferrite square magnet with mounting hole in the middle

Dongguan Courage Magnetoelectric Technology Co., Ltd. is a Chinese magnet manufacturer specializing in the production of strong neodymium magnets, ceramic ferrite magnets, motor multipole magnets. We have cooperated with many customers for many years, mainly for the following reasons:

1, We are good at processing high performance, high precision, high difficulty magnet, especially in the field of DC motor magnet, have strong professional knowledge, experience.

2, We have a professional production, sales, design team, based on the industry for more than 14 years.

3, We have advanced magnet production and testing equipment, according to customer requirements to design, production of special requirements of magnet products,

4. The company's products have passed SGS, ROHS, REACH certification and a complete ISO9001 quality management system, specializing in providing high-quality permanent magnet products to customers in various countries.

5. Experience in serving Western, Asian and North American companies, we also have close ties with other regions, fedex or DHL can deliver,

6, Even if our customers do not know much about magnets, we will help and provide accurate product solutions.

You may be interested;

Courage Magnet Manufacturer Magnet Testing Certificate & Report

You may be interested in these magnet problems (Q&A) ;

1、Could you give me some magnet samples?

Yes, we have magnets in stock to help you get samples as soon as possible.

2、How long will it take me to get a reply to your email or inquiry?

We will contact you as soon as possible within 12 hours.

3、Why don't the magnets on your company website say the price?

Magnets belong to functional products, most customers have different requirements for magnets, such as material, shape, performance, tolerance, temperature resistance, purchase quantity, etc., we can customize processing according to your requirements, so we need to clarify your specific needs and then give you a quote.

4、Do you guarantee the quality of your magnet products?

We have ISO,SGS and REACH certifications. If necessary, we can send you relevant materials.

5、May I come and visit your magnet factory?

Sure. We'll show you around our factory if you want.

6、What is your delivery time?

See if there is spot stock, if there is immediately can be arranged to send, if there is no need to process in 10-30 days or so, depending on what kind of magnet.

More Questions and Answers about Magnets: https://www.couragemagnet.com/magnet-faqs/

Courage magnet manufacturer magnet packaging and delivery method:

The magnets we make are mainly delivered to you by sea or air. The packaging is generally neutral packaging, shielded packaging, vacuum packaging, pallets, etc., which can be packed according to your requirements.

Explanation:

a: Express (TNT, DHL, FedEx, UPS, etc.), air freight, sea freight.

b: The weight is less than 40Kgs. We suggest sending it to you by shield box.

c: It weighs between 40 kg and 100 kg. It can be expressed or shipped by air.

d: The weight is over 100 kg. We suggest sea transportation.