Bar Rod magnets AlNiCo, Deep Pot Holding, steel body with Threaded Neck, Male Thread, galvanized, Rod magnet AlNiCo (Aluminum Nickel Cobalt) with metal pot and external thread.
Magnet ID:              ADPET-5060
Material: Circular rods made of precision-cast AINiCo 500 and steel body
Plating / Coating:  galvanized        
Shape:         Bar / Rod  with External  Thread
Tolerance:           D ±0.1 mm / H ±0.2 mm
Magnetisation Direction:    anisotrop
Maximum Operation Temperature: 450 °C 
Delivery Time:           14-35 days
Article number         D mm                H mm           Thread MxL      Force* N     Weight g      Temperature °C    
ADPET-5060         50(+0.1/-0.1)     60(+0.2/-0.2)            M10x15                 400                  807                    450        
Measurements:

The weakness of alnico magnets is that they can easily be demagnetized - even with another alnico magnet.  They don't last long when you push two North poles together to feel the repulsion.  After a while, you will notice that they begin to weaken.  The greatest care for these magnets is in how you store them and restore them.
First, you don't want to bring ferrite or rare earth magnets close to alnico magnets.  You can very quickly demagnetize them or remagnetize them in the opposite direction!  How should they be stored?
If you have a horseshoe alnico magnet, store them with a keeper.  This is just a steel bar that will stick to the two ends of the magnet.  The purpose is to allow the field to continue flowing through the horseshoe and not be pushed around by other magnetic fields.  The following diagrams show this.  You could even place two horseshoes together, with opposite poles touching, to keep them strong.