16 x 6 mm Neodymium Rare Earth Female Stud Mounting Magnet N38 PN: MM-D-16

• Dimensions:
      D=16mm (0.63")
      d=4mm (0.16") (M4 Coarse Female threaded stud)
      H=13mm (0.51")
      h=5mm (0.20")
      M=6mm (0.24")
• Material: NdFeB, Grade N38
• Plating/Coating: Ni-Cu-Ni (Nickel)
• Magnetization Direction: Axial (Poles on Flat Ends)
• Weight: 0.28 oz. (7.94 g)
• Pull Force: 12.1 lbs
• Surface Field: N/A
• Brmax: 12,600 Gauss
• BHmax: 38 MGOe

The MM-D style is a flat mounting magnet with a female threaded shaft permanently attached. If you need a magnet to attach to something threaded, this is what you need.