20mm x 3mm (25/32" x 1/8") Neodymium Disc Magnet – N52 Grade 

Key Features:

• Dimensions: 20mm Diameter × 3mm Thickness
• Precision Tolerance: ±0.05mm 
• Magnet Grade: N52 
• Pull Force: Approx. 11.8 lbs 
• Coating: Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer plating 
• Magnetization: Axially magnetized (Poles on the flat circular faces)
• Surface Gauss: Approx. 3,228 Gauss

Material Description:

Our 20x3mm N52 discs are designed for professional engineering applications that require a robust magnetic bond with a broad footprint. The 3mm thickness ensures a high magnetic volume, allowing the flux to penetrate through thick non-magnetic barriers like heavy cabinetry wood, acrylic housings, or industrial resin. These are the premier choice for "invisible" heavy-duty latches, magnetic couplers in robotics, and securing equipment in environments subject to constant movement or vibration.

Handling Advice: DANGER: These magnets possess extreme snap velocity. With nearly 10 lbs of pull force, they can jump toward each other from several inches away. High-impact collisions WILL shatter the brittle neodymium core and can cause serious skin pinches or blood blisters. Always handle one at a time and separate by sliding horizontally.

Warnings and Safety Information:

• Pinch Hazard: Strong enough to cause blood blisters or painful skin pinches. Handle with caution.
• 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 concealed latches for secret doors, panels, and industrial cabinetry
• Structural mounting for heavy tools, workshop organization, and removable fixtures
• High-torque magnetic couplers for robotics and industrial prototypes
• Precision sensor triggers for high-accuracy Hall effect sensors requiring a deep field
• Secure mounting for outdoor signage and heavy retail displays