7mm x 4mm x Hole 2mm Neodymium Countersunk Magnet – N52 Grade | Intensive Micro Screw-Mount Fastener

Key Features:

• Dimensions: 7mm Outer Diameter × 4mm Thickness × 2mm Inner Hole Diameter
• Countersink Profile: Accommodates standard M2 flathead micro wood/machine screws for completely flush mounting
• Precision Tolerance: ±0.05mm 
• Magnet Grade: N52 
• Pull Force: Approx. 3.6 lbs 
• Coating: Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer plating 
• Magnetization: Axially magnetized (Poles on the flat circular faces, countersunk on the North or South face)

Material Description:

Our 7mm x 4mm countersunk N52 ring magnets are engineered specifically for demanding, compact industrial fabrication and luxury packaging projects where traditional adhesives fail. The 4mm thickness provides a deeper magnetic field than standard thin wafers, allowing the flux to project reliably through thin non-magnetic dividers. Featuring an integrated 2mm countersunk hole, it allows an M2 micro flathead screw to sit perfectly flush with the magnet's surface, ensuring uninterrupted metal-to-magnet contact and maximizing the available 2.4 lbs of holding force.

Handling Advice: CRITICAL NOTICE: High-performance micro countersunk rings require precise handling. Sintered neodymium is inherently brittle like ceramic. Because this magnet packs a strong pull force into a small body, over-tightening installation screws with manual or power drivers will instantly crack or split the core at the recessed center point—always hand-tighten with care. Avoid allowing these magnets to snap together freely from a distance, as they will shatter upon impact.

Warnings and Safety Information:

• Fragility Hazard: Highly brittle. Do not over-tighten screws. High impact from snapping together WILL fracture the micro ring wall.
• CHOKING HAZARD: Micro-sized 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:

• Heavy-duty micro hidden catches for luxury display cases, premium cigar boxes, and high-end cabinetry
• Mechanical anchoring for modular swappable component systems and heavy weapons fixtures in tabletop gaming miniatures
• Deep-reach proximity sensor targets for industrial automation, micro-robotics, and smart switches
• Concealed micro alignment tabs and access covers for low-clearance 3D-printed enclosures
• Secure mechanical mount fasteners for miniature instrumentation, camera rigs, and drone hardware components