Countersunk Neodymium Magnets – Precision Screw-Mountable Rare Earth Magnets With Pre-Drilled Holes

• Industrial Fixtures: Mounting tool holders, conveyor belt components and equipment guides
• Outdoor Signage: Securing metal signs to walls, poles and structures
• DIY Projects: Building custom magnetic shelves, tool racks and workshop organizers
• Commercial Equipment: Installing magnetic latches, sensors and fasteners in machinery

⭐ Key Features

🔹 1. Precision Countersunk Hole Design

• Tapered Hole: Machined to exact specifications (82° standard angle) to fit flat-head screws, ensuring the screw head sits 100% flush with the magnet surface
• Central/Offset Options: Central holes for symmetrical mounting; offset holes for space-constrained applications (custom hole positions available on request)
• Screw Compatibility: Works with standard metric (M3-M8) and imperial (#4-#10) flat-head screws for universal mounting flexibility
• Reinforced Drilling: Precision machining process eliminates cracking or chipping around the hole, ensuring the magnet’s structural integrity and magnetic strength are not compromised

🔹 2. N35-N52 High-Strength Neodymium Core

• Full Strength Range: Choose the perfect pull force for your application:
  • N35 (Entry-Level): Ideal for light-duty fixtures (tool holders, small signs) — pull force up to 5kg (Φ20mm×5mm)
  • N42 (Mid-Grade): Versatile for most commercial and industrial uses (conveyor components, medium signs) — pull force up to 12kg (Φ20mm×5mm)
  • N50 (High-Performance): For heavy-duty applications (large signage, industrial equipment) — pull force up to 18kg (Φ20mm×5mm)
  • N52 (Top Grade): The strongest commercial neodymium grade for maximum holding power (heavy industrial fixtures, large metal signs) — pull force up to 25kg (Φ30mm×10mm)
• Uniform Magnetic Field: Precision grinding ensures a consistent magnetic field across the entire surface, providing a strong, even hold

🔹 3. Multiple Plating Options for Durability & Corrosion Resistance

• NiCuNi Triple Plating (Standard): 3-layer nickel-copper-nickel coating provides excellent corrosion resistance, passes 48-hour salt spray test — ideal for indoor and mild outdoor use
• Epoxy Coating (Waterproof): Additional 200μm epoxy layer over NiCuNi plating, IP68 waterproof rating, passes 1000-hour salt spray test — perfect for outdoor, marine and high-humidity environments
• Gold Plating (Premium): Thin gold layer over NiCuNi-copper plating, superior electrical conductivity, biocompatible, passes 2000-hour salt spray test — ideal for medical devices, aerospace components and high-end electronics

🔹 4. Multi-Size & Customization Options

• Standard Sizes: Discs (Φ10mm-Φ50mm, thickness 3mm-20mm); blocks (10×10×5mm to 50×50×20mm) — all with countersunk holes
• Custom Shapes/Sizes: Precision-machined custom shapes (rectangles, rings, ovals) and sizes with countersunk holes — no 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