Pot magnet with threaded stud 32 mm - supermagnete.de
Mount Magnet / Holding Magnet - SuperMagnetMan - Cap Magnet CAP_D200C
Strong Neodymium Rectangular Pot Magnets with Counter Bore, 70LBS(25 KG) Pulling Force Countersunk Hole Magnets with Mounting Screws - 60x13.5x5mm, Pack of 12: Amazon.com: Industrial & Scientific
Pot Magnets - SDM Magnetics Co., Ltd.
Pot magnets with threaded end | Goudsmit Magnetics