Collection: Countersunk Ring Super Magnets

A countersunk ring magnet has a tapered center hole, so you can fasten it down with a flat-head screw and have the screw sit flush with the surface. That gives you a mechanical hold and a magnetic one, which matters for mounting points that take repeated stress or need to stay put permanently.

These come in 8mm, 10mm, and 12mm diameters at 3mm thick, plus a 20mm x 5mm and a 25mm x 4mm for heavier mounts. They suit panel mounts, tool holders, removable hatches, jigs, and any build where a glued-in magnet would eventually work loose.

We recommend matching the screw size to the countersink; if you are unsure, the larger diameters take a standard countersunk wood or machine screw.

(Diameter x Height)

Prefer inch sizes? See our SAE fractional countersunk ring magnets.