The SMMM-D-42 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.
Dimensions:
D=42mm (1.65″)
d=6mm (0.32″) (M6 Coarse Female threaded stud)
H=20mm (0.79″)
h=9mm (0.36″)
M=10mm (0.39″)
Material: NdFeB, Grade N38
Plating/Coating: Ni-Cu-Ni (Nickel)
Magnetization Direction: Axial (Poles on Flat Ends)
Weight: 3.44 oz. (97.5 g)
Pull Force: 149.9 lbs
Surface Field: N/A
Brmax: 12,600 Gauss
BHmax: 38 MGOe