Pot magnets with internal thread

This type of pot magnet has an internal thread so that it can be mounted with a bolt. You can find a bolt size that matches the thread of the pot magnet by comparing the thread size on the product pages with this small chart: Chart to find the correct bolt size
Pot magnets have a very strong magnetic attraction due to their steel pot/cap. However be aware that the strength is calculated for a direct pull. If the pot magnet is placed on a vertical surface (e.g. a whiteboard), the pot magnet will hold 10-15% of its rated strength before slipping or falling off. You should therefore consider whether the pot magnet needs to hold something vertically or horizontally and choose the magnetic strength accordingly. To prevent the pot magnet from slipping, you can increase the friction by using a rubber cap or silicone washer. A link to these can be found below.