15mm x 3mm Neodymium Disc Magnet – N52 Grade | Water-Resistant Black Epoxy Coating

Key Features:

• Dimensions: 15mm Diameter × 3mm Thickness
• Corrosion-Resistant Coating: Premium Black Epoxy resin shell protects against moisture, salt spray, and oxidation
• Wide-Footprint Profile: Broad 15mm face maximizes lateral contact and provides excellent resistance to sliding forces
• Precision Tolerance: ±0.05mm 
• Magnet Grade: N52 
• Pull Force: Approx. 8.9 lbs 
• Magnetization: Axially magnetized (Poles on the flat circular faces)

Material Description:

Our 15mm x 3mm N52 black epoxy coated disc magnets provide a highly resilient, low-profile fastening solution for projects exposed to damp, high-humidity, or light outdoor conditions. Unlike standard triple-layer nickel plating which can oxidize or flake over time in challenging environments, the continuous black epoxy finish forms an airtight shield over the rare-earth core. The 15mm diameter spreads the magnetic force across a wider area to offer enhanced shear stability, while the thin 3mm depth allows it to be easily embedded into shallow routed channels, cabinetry, or molded plastics using premium epoxy or acrylic adhesives.

Handling Advice: DANGER: Wide, high-performance N52 rare earth discs require careful handling. Sintered neodymium is inherently brittle like ceramic. High-velocity impact from snapping magnets together or colliding with steel surfaces can cause the profile to chip, crack, or breach the protective epoxy layer. To maintain maximum corrosion resistance and prolong product life, always separate individual pieces by sliding them off the stack rather than pulling them apart vertically, and avoid sudden impacts during assembly.

Warnings and Safety Information:

• Pinch Hazard: Strong enough to cause sharp skin pinches or small blood blisters if handled carelessly in groups.
• Fragility Hazard: Core is brittle. Prevent high-impact collisions to avoid chipping the core or breaching the protective resin coating.
• CHOKING HAZARD: Keep securely stored and out of reach of children and pets.
• Medical Safety: KEEP AWAY from pacemakers and sensitive medical implants at all times.

Applications:

• Moisture-resistant hidden latches for marine cabinetry, outdoor enclosures, and humidor box lids
• Concealed alignment closures for premium waterproof outerwear, tactical gear, and technical apparel
• Discreet flush-mount attachments for outdoor signage, vehicle banners, and exhibition presentation frames
• High-efficiency sensory triggers, reed switch activations, and low-clearance Hall-effect arrays in damp environments
• Shallow inlay mounting points for thin 3D-printed outdoor equipment housing panels and battery doors