Round Countersunk Neodymium Magnets N35-N52 | Screw-Mount Flush Disc Magnets for Industrial/DIY

• Core Design: Circular neodymium disc magnet with 80° industry-standard tapered countersunk hole (central drill) + precision ground surface + corrosion-resistant plating—designed to fit flat-head screws perfectly for a 100% flush mount
• Core Advantage: Permanent screw-mount installation eliminates adhesive failure, temperature degradation, and surface compatibility issues; the countersunk design removes protruding hardware for a professional, low-profile finish
• Core Performance: N35-N52 rare earth strength (pull force up to 45kg per magnet for large N52 models) + multi-plating options (NiCuNi for general use, epoxy for waterproof/outdoor use)
• Core Scenarios: Outdoor metal signage mounting, industrial machinery fixtures, workshop tool holders, retail display hardware, garage/DIY organization, and marine equipment (epoxy-coated)

⭐ Key Features 

🔹 1. Industry-Standard 82° Tapered Countersunk Hole (Flush Screw Mount)

• 82° Tapered Design: Matches all standard metric (M3-M8) and imperial (#4-#10) flat-head screws—ensures the screw head sits 100% flush with the magnet surface (no protruding hardware, no snags)
• Central Precision Drilling: CNC-machined central hole with no cracking, chipping, or burring—eliminates weak points and preserves the magnet’s full magnetic strength and structural integrity
• Tight Tolerances: ±0.05mm machining accuracy for the hole and magnet diameter—guarantees a perfect fit for screws and consistent performance across all units
• Screw Compatibility Guide: Pre-matched screw sizes for every magnet dimension (included with all orders) to avoid misalignment or ill-fitting hardware

🔹 2. N35-N52 High-Strength Neodymium Core (Tailored Pull Force)

• Full Strength Range: Choose the exact holding power for your application—no overspending on unnecessary strength, no settling for weak hold:
  • N35 (Entry-Level): Light-duty mounting (small signage, DIY tool holders) → pull force up to 6kg (Φ20×5mm)
  • N42 (Mid-Grade): Versatile commercial/industrial use (medium signage, retail displays) → pull force up to 15kg (Φ20×5mm)
  • N50 (High-Performance): Heavy-duty mounting (large outdoor signage, industrial fixtures) → pull force up to 28kg (Φ20×5mm)
  • N52 (Top-Grade): Maximum commercial strength (heavy machinery, marine equipment) → pull force up to 45kg (Φ50×10mm)
• Uniform Magnetic Field: Precision ground top/bottom surfaces ensure an even, consistent magnetic hold across the entire disc—no weak spots for secure mounting
• Rare Earth Efficiency: 8x stronger than ferrite magnets—small round countersunk magnets deliver massive holding power, saving mounting space for compact projects

🔹 3. Dual Plating Options (Durability for Any Environment)

✅ NiCuNi Triple Plating (Standard - In-Stock)

• 3-layer nickel-copper-nickel coating → passes 48-hour salt spray test
• Corrosion/scratch-resistant → ideal for indoor/ mild outdoor use (workshops, retail, office)
• Smooth, non-abrasive finish → won’t damage mounting surfaces or hardware

✅ Epoxy Coating (Premium - Waterproof/Marine)

• NiCuNi base + 200μm thick epoxy top coat → IP68 waterproof/dust-tight rating, passes 1000+ hour salt spray test
• Saltwater/UV resistant → perfect for outdoor signage, marine equipment, high-humidity industrial environments
• Impact/abrasion-resistant → protects the magnet from physical damage in rugged use