7mm x 4mm (5/16" x 1/8") Neodymium Disc Magnet – N52 Grade 

Key Features:

• Dimensions: 7mm Diameter × 4mm Thickness
• Precision Tolerance: ±0.05mm 
• Magnet Grade: N52 
• Pull Force: Approx. 3.3 lbs 
• Coating: Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer plating 
• Magnetization: Axially magnetized (Poles on the flat circular faces)
• Shape: High-Aspect Compact Pillar

Material Description:

Our 7mm x 4mm N52 discs are engineered for specialized applications that require a robust magnetic bond within a tight horizontal area. The 4mm deep-pillar design allows the magnetic flux to project significantly further through non-magnetic materials like heavy industrial plastics, resins, or wood barriers compared to thin wafers. These are the premier choice for heavy-duty hidden latches in high-end millwork, deep-reach sensor triggers in automation, and securing high-vibration removable mechanical fixtures.

Handling Advice: DANGER: These compact pillars possess immense snap velocity. With 4.5 lbs of pull force packed into a small frame, they can jump together violently from several inches away. High-impact collisions WILL shatter the brittle neodymium core and can cause serious skin pinches or blood blisters. Always handle one at a time and slide horizontally to separate.

Warnings and Safety Information:

• Pinch Hazard: Strong enough to cause painful skin pinches or blood blisters. Handle with professional caution.
• CHOKING HAZARD: Small size poses a severe danger to children and pets. Keep strictly secured.
• Ingestion Warning: Swallowed magnets can attract through tissue walls, causing fatal internal damage. SEEK IMMEDIATE MEDICAL ATTENTION if ingested.
• Medical Safety: KEEP AWAY from pacemakers and sensitive medical implants at all times.

Applications:

• Heavy-duty concealed latches for premium custom cabinetry, display boxes, and secret doors
• Flush-mounted removable panels and high-strength access doors for 3D-printed enclosures
• High-torque magnetic couplers and mechanical components for professional robotics
• Deep-reach sensor triggers for industrial proximity switches and Hall-effect setups
• Magnetizing large scale swappable weapons systems for heavy tabletop gaming models