12mm x 4mm (1/2" x 5/32") Neodymium Disc Magnet – N52 Grade 

Key Features:

• Dimensions: 12mm Diameter × 4mm Thickness
• Precision Tolerance: ±0.05mm 
• Magnet Grade: N52 
• Pull Force: Approx. 8.5 lbs 
• Coating: Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer plating 
• Magnetization: Axially magnetized (Poles on the flat circular faces)
• Surface Gauss: Approx. 4,028 Gauss

Material Description:

Our 12x4mm N52 discs are designed for professional engineering applications that require a robust magnetic bond. The 4mm 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 movement or vibration.

Handling Advice: DANGER: These magnets possess extreme snap velocity. With 6.5 lbs of pull force, they can jump toward each other from several inches away. This can result in shattered magnets or painful skin pinches. Always handle one at a time, keep a firm grip, and separate them from a stack by sliding horizontally. Avoid any high-impact collisions.

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