100pcs 4mm x 4mm x 1mm 5/32" x 5/32" x 1/32" N52 Thin Square Blocks Rare Earth Neodymium Magnets 4x4x1mm

4mm x 4mm x 1mm (5/32in x 5/32in x 1/32in)
Neodymium Block Magnet – N52 Grade (Pull Force approx. 0.64 lbs).

Key Features:

• Dimensions Metric: 4mm length × 4mm width × 1mm thickness
• Dimensions Imperial: 5/32 inch length × 5/32 inch width × 1/32 inch thickness
• Magnet to steel pull force: approx. 0.64 lbs
• Magnet Grade: N52
• Coating: Triple-Layer Nickel-Copper-Nickel (Ni-Cu-Ni) - Total: 15 – 25 µm
• Material Composition: Neodymium (Nd), Iron (Fe), and Boron (B) – Nd₂Fe₁₄B formula
• Shape: Block
• Magnetization Direction: Axial (Through Thickness)
• Surface Magnetic Field (B₀): ~2,968 Gauss
• Max Operating Temperature: 80°C (176°F)
• Curie Temperature: 310°C (590°F)
• Residual Induction (Br): 14.3 – 14.8 kGs (1.43 – 1.48 T)
• Max Energy Product ((BH)max): 52.0 MGOe (414 kJ/m³)
• Dimensional Tolerance: ±0.05 mm (±0.002 in)
• Estimated Weight: 0.12 grams (0.004 oz)
• SKU / Part Number: JCN52-BLK0441

Material Description:

Neodymium magnets are made from powerful rare earth metals. These 3/64" thick blocks are ultra-low profile, making them perfect for applications where a strong pull is needed without the bulk. They are the strongest commercially available permanent magnets for their size.

Note: Due to their ultra-thin profile, these magnets are brittle. Handle with care to prevent them from snapping together and shattering. Always slide magnets apart rather than lifting.

Warnings and Safety Information:

• Keep away from children. Small magnets pose a choking hazard and can cause serious internal injury if swallowed.
• Avoid contact with pacemakers. Magnetic fields can interfere with medical device operation.
• Handle with caution. Magnets may snap together quickly; keep fingers clear and avoid impact.
• Not a toy. Designed for industrial, professional, and hobbyist use only.
• Thermal Sensitivity. Do not heat above 80°C (176°F) to prevent permanent loss of magnetic strength.