20mm x 5mm (25/32" x 13/64") Neodymium Disc Magnet – N52 Grade 

Key Features:

• Dimensions: 20mm Diameter × 5mm Thickness
• Precision Tolerance: ±0.05mm 
• Magnet Grade: N52 – Maximum commercial energy density for peak flux
• Pull Force: Approx. 18.4 lbs 
• Coating: Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer plating 
• Magnetization: Axially magnetized (Poles on the flat circular faces)
• Surface Gauss: Approx. 4,170 Gauss

Material Description:

Our 20x5mm N52 discs are engineered for applications where an incredibly deep and powerful magnetic field is required. The 5mm thickness creates a massive magnetic volume that can penetrate through thick non-magnetic barriers like heavy cabinetry, industrial plastics, or structural wood. These are the premier choice for "invisible" heavy-duty structural latches, high-torque couplings in robotics, and securing equipment in high-vibration industrial environments.

Handling Advice: DANGER: These magnets possess immense snap velocity. With nearly 18 lbs of pull force, two magnets can jump together from a significant distance with enough speed to shatter the brittle core or cause serious skin pinches and blood blisters. Always handle one at a time and separate by sliding them apart horizontally using a plastic wedge if necessary.

Warnings and Safety Information:

• Crush Hazard: High risk of serious skin and finger injury. Handle with industrial-strength focus.
• Choking Hazard: Keep strictly away from children and pets.
• Medical Safety: KEEP AWAY from pacemakers and sensitive medical implants at all times.
• Electronics: Keep well away from hard drives, credit cards, and sensitive electronic testing equipment.

Applications:

• Heavy-duty magnetic stirrers for ultra-high-viscosity laboratory and industrial liquids
• Concealed structural latches for heavy secret doors, thick panels, and security safes
• Industrial-strength tool organization and heavy equipment mounting
• High-torque magnetic couplers for professional robotics or renewable energy prototypes
• Heavy-duty removable panels for automotive or aerospace industrial housings