6mm x 4mm (15/64" x 5/32") Neodymium Disc Magnet – N52 Grade | Water-Resistant Black Epoxy Coating

Key Features:

• Dimensions: 6mm Diameter × 4mm Thickness (Approx. 15/64" × 5/32")
• Corrosion-Resistant Coating: Premium Black Epoxy resin shell protects against moisture, humidity, and oxidation
• Intense Deep-Field Profile: Substantial 4mm thickness creates maximum magnetic volume for deeper flux penetration
• Precision Tolerance: ±0.05mm 
• Magnet Grade: N52 
• Pull Force: Approx. 3.1 lbs 
• Magnetization: Axially magnetized (Poles on the flat circular faces)

Material Description:

Our 6mm x 4mm N52 black epoxy coated disc magnets provide a highly resilient, deep-field fastening solution for precision manufacturing, compact consumer electronics, and boutique packaging exposed to moisture or high humidity. Unlike standard triple-layer nickel plating which can corrode, flake, or fail when exposed to damp environments or frequent skin contact, the continuous black epoxy finish forms an airtight shield over the rare-earth core. The substantial 4mm depth gives this micro cylinder an extended magnetic reach, allowing the flux field to project reliably through thicker non-magnetic barriers like premium wood veneers, plastics, leather, or fabrics without losing its crisp "snap" closure.

Handling Advice: CRITICAL NOTICE: High-performance micro N52 rare earth discs require careful handling. Sintered neodymium is inherently brittle like ceramic. Despite its thick cylindrical profile, this compact magnet possesses a surprisingly high snap velocity and attracts with considerable force relative to its size. High-velocity impact from snapping magnets together or colliding with steel surfaces can cause the core to chip, fracture, or breach the protective epoxy layer. Always separate individual pieces by sliding them off the stack rather than pulling apart vertically, and keep them spaced apart during assembly.

Warnings and Safety Information:

• Fragility Hazard: Core is brittle. Prevent high-impact collisions to avoid fracturing the magnet or chipping the protective resin coating.
• CHOKING HAZARD: Miniature profile poses a severe danger to children and pets. Keep strictly secured.
• Ingestion Warning: Swallowed magnets can attract through internal tissue walls, causing fatal complications. SEEK IMMEDIATE MEDICAL ATTENTION if ingested.
• Medical Safety: KEEP AWAY from pacemakers and sensitive medical implants at all times.

Applications:

• Moisture-resistant hidden latches for luxury cosmetic boxes, premium humidor dividers, and high-end cabinetry
• Concealed alignment closures for premium waterproof outerwear, tactical gear, and technical apparel
• Deep-reach proximity sensor targets, miniature reed switch activations, and low-clearance Hall-effect arrays
• High-retention swappable component attachments and heavy weapons fixtures for high-end tabletop gaming
• Inlay mounting points for thin 3D-printed equipment lids, rugged outdoor enclosures, and battery doors