The SMMM-D-25 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=25mm (0.98″)
d=5mm (0.20″) (M5 Coarse Female threaded stud)
H=17mm (0.67″)
h=8mm (0.31″)
M=8mm (0.31″)
Material: NdFeB, Grade N38
Plating/Coating: Ni-Cu-Ni (Nickel)
Magnetization Direction: Axial (Poles on Flat Ends)
Weight: 0.98 oz. (27.8 g)
Pull Force: 48.5 lbs
Surface Field: N/A
Brmax: 12,600 Gauss
BHmax: 38 MGOe