Epoxy-Coated Countersunk Neodymium Magnets N35-N52 | Waterproof Screw-Mount Rare Earth Magnets for Outdoor, Marine & Industrial Use

• Core Construction: N35-N52 neodymium magnet core → NiCuNi triple base plating → 200μm thick epoxy top coating → precision 82° tapered countersunk hole (for flush flat-head screw mounting)
• Core Benefits: IP68 waterproof/dust-tight rating (1000+ hour salt spray test passed) + permanent screw-mountable design + full neodymium strength retention + zero corrosion in marine/outdoor environments
• Core Scenarios: Outdoor metal sign mounting, marine equipment fixtures, industrial wet environment tool holders, water treatment plant components, high-humidity warehouse systems

⭐ Key Features

🔹 1. IP68 Waterproof & Extreme Corrosion Resistance (Epoxy Coating)

• Dual-Layer Protection: NiCuNi triple base plating (corrosion barrier) + 200μm thick epoxy top coating (waterproof, scratch-resistant seal) → unmatched durability in wet environments
• IP68 Rating: Fully submersible in water (up to 10m depth) for long-term use, dust-tight and moisture-proof — perfect for marine, outdoor, and industrial wet applications
• 1000+ Hour Salt Spray Test Passed: Outperforms standard NiCuNi-plated magnets by 5x in saltwater environments — no rust, no peeling, no loss of strength
• Scratch-Resistant Epoxy: Thick epoxy layer resists abrasion from rough handling, industrial use, and outdoor elements — ensures long-term protection even with frequent contact

🔹 2. Precision Countersunk Hole Design (Flush Screw Mount)

• 82° Tapered Hole: Machined to exact industry standards to fit standard flat-head screws (metric M3-M8 / imperial #4-#10) — ensures the screw head sits 100% flush with the magnet surface for a professional, low-profile finish
• Reinforced Drilling Process: Precision CNC machining eliminates cracking, chipping, or structural damage around the hole — the magnet’s magnetic strength and structural integrity are 100% uncompromised
• Central/Offset Hole Options: Central holes for symmetrical mounting; offset holes for space-constrained applications (custom hole positions, multiple holes, or custom angles available on request)
• Permanent Mounting Flexibility: Screw-mount design allows for permanent, secure installation — no adhesive failure, no temporary fasteners, no re-mounting required

🔹 3. N35-N52 High-Strength Neodymium Core

• Full Strength Range: Choose the perfect pull force for your application — no overspending on unnecessary strength, no settling for insufficient hold:
  • N35 (Entry-Level): Ideal for light-duty wet environments (small outdoor signs, high-humidity tool holders) → pull force up to 6kg (Φ20mm×5mm)
  • N42 (Mid-Grade): Versatile for most marine and outdoor uses (medium metal signs, boat equipment fixtures) → pull force up to 14kg (Φ20mm×5mm)
  • N50 (High-Performance): For heavy-duty wet applications (large outdoor signage, industrial wet environment equipment) → pull force up to 22kg (Φ20mm×5mm)
  • N52 (Top Grade): The strongest commercial neodymium grade for maximum holding power in harsh wet environments (heavy marine equipment, large industrial fixtures) → pull force up to 28kg (Φ30mm×10mm)
• Uniform Magnetic Field: Precision grinding ensures a consistent magnetic field across the entire surface — provides a strong, even hold for secure mounting

🔹 4. Multi-Size & Customization Options

• Standard Sizes: Discs (Φ10mm-Φ50mm, thickness 3mm-20mm); blocks (10×10×5mm to 50×50×20mm) — all with epoxy coating and countersunk holes
• Custom Shapes/Sizes: Precision-machined custom shapes (rectangles, rings, ovals) and sizes with epoxy coating and countersunk holes — low minimum order quantity (MOQ) for standard customizations
• Bulk Order Flexibility: Competitive pricing for bulk orders (1000pcs+), with fast lead times and free samples available for quality verification
• High-Heat Options: N52SH/N52UH high-heat grades available (operate up to 150°C) for high-temperature wet environments (e.g., industrial steam cleaners, hot water treatment systems)