Magnetisation Grade:         N40
Material: Neodymium-Iron-Boron (NdFeB, Neo)
Magnet ID:              NPWH-25-N40-White
Plating / Coating:  Nickel (Ni), powder coated white       
Shape:         White Hook  
White Hook Magnet Size: 
White Pot diameter D 25,3 mm
Neck diameter d 8,3 mm
White Pot height H1 7,3 mm
Total height without hook H2 14,3 mm
Total height with hook H3 30,3 mm
Thread M 4
White Hook opening width a 3,7 mm
White Hook inside diameter b 5,2 mm
Tolerance:         ±0.05 mm
Magnetisation Direction:    Axial  /  Radial   
Residual Magnetic Flux Density (Br): 1250-1280 mT (12.5-12.8 kGs)
Energy Density (BH)max:             302-326 KJ/m³  (38-41 MGOe) 
Coercivity Force (Hcb):              ≥ 907 kA/m ( ≥ 11.4 kOe)  
Intrinsic Coercivity Force (Hcj):    ≥ 955  kA/m ( ≥ 12 kOe)   
Maximum Operation Temperature: 80 °C 
Delivery Time:           14-35 days   
Measurements:

Assembled of a round mild steel cover,  a non-ferrous insulator and a Neodymium magnet core, pressed together. There is a center hole, or a tap hole, or a tap bolt on the back of the assembly for mounting.
Max pull is tested on a ½” thick and flat machined steel plate. The actual pull should be smaller if your steel is thinner, rough, rusty, coated  or   not   very   flat.    For    any      critical applications, three-time safety factor is strongly recommended. 
Round Neodymium Magnetic Holders
Max operating temperature is 176°F (80°C).  
Besides standard models (Stock Sizes)  listed bellow, we can make assemblies to custom designs. The lead time of first shipment is 8 to 12 weeks.  
 Applications include magnetic holding, Lifting, Antenna Mounting and Positioning.