MM-B-20 - Neodymium Counterbored Mounting Magnet - 20mm Dia

• Dimensions:
      D=20mm (0.79")
      d1=4.5mm (0.18") (Sized for M4 screw)
      d2=8.5mm (0.33") (Straight counterbored hole)
      h=7mm (0.28")
• Material: NdFeB, Grade N38
• Plating/Coating: Ni-Cu-Ni (Nickel)
• Magnetization Direction: Axial (Poles on Flat Ends)
• Weight: 0.42 oz. (11.9 g)
• Pull Force: 13.2 lbs
• Surface Field: N/A
• Brmax: 12,600 Gauss
• BHmax: 38 MGOe

The MM-B style is a flat mounting magnet with a straight hole through the magnet to recess a screw or bolt head. These mounting magnets are incredibly useful for when you need to securely fasten a magnet to your project.