Magnetisation Grade:         N38M
Material: Neodymium-Iron-Boron (NdFeB), Neodymium and Steel 
Magnet ID:              NPET-40-N38M-Zn
Plating / Coating: zinc-plated (zn) / zink    
Shape: Disc / with Threaded Stem / External Thread    
Pot Magnet Size: 
Pot diameter (D): 40 mm
Pot height (H1): 9 mm
Total height  (H2): 20 mm
Thread (M): M8
Tolerance:         ±0.1 mm
Magnetisation Direction:   Axial / Radial  
Residual Magnetic Flux Density (Br): 12.2-12.6 KGs (T):  1.12-1.26 T 
Energy Density (BH)max:              35-39 MGOe   279-310 KJ/m³   
Coercivity Force (Hcb):              ≥11.5 KOe  ≥916 KA/m   
Intrinsic Coercivity Force (Hcj):    ≥14 KOe    ≥1114 KA/m   
Maximum Operation Temperature: 100 °C
Delivery Time:           14-35 days   
Measurements:

Pot magnets are used for clamping and holding applications..Pot magnets have two N and S poles on one face of the magnet, which makes a completed magnetic circuit to be made when this face is in direct contact with  steel objects, providing a strong grip.
. With the female thread, it can be fixed easily.
.the maximum operating temperature: 100deg C
. there is a Male thread