SMON6926 1 x 1/4 Inch Neodymium Rare Earth Plastic Coated Countersunk Ring Magnet N42 (#6 screw)

Brand Description

Stanford Magnets, a company specializing in the research and production of advanced materials, guarantees that each of its products reaches international leading standards through meticulous craftsmanship and strict quality control. The 1" Plastic Coated Countersunk Ring Magnet N42 delivers 42 MGOe magnetic strength with screw-mount versatility and polymer protection, engineered for industrial fixtures, automotive assemblies, and display systems requiring secure fastening and corrosion resistance.

Related Products: Plastic Coated Magnets

1 x 1/4 Inch Neodymium Rare Earth Plastic Coated Countersunk Ring Magnet N42 (#6 screw) Specifications

Properties

*The above product information is based on theoretical data. For specific requirements and detailed inquiries, please contact us.

1 x 1/4 Inch Neodymium Rare Earth Plastic Coated Countersunk Ring Magnet N42 (#6 screw) Description

This neodymium ring magnet is sintered from NdFeB alloy (42 MGOe) with a 25.4 mm outer diameter and 6.35 mm inner diameter, optimized for #6 screw mounting. The 3.0 mm thickness includes an 82° precision-countersunk recess, enabling flush screw installation. A 0.4 mm nylon/polypropylene coating provides impact resistance, electrical insulation, and protection against humidity and chemicals, surpassing 600 hours in salt spray tests (ASTM B117). Axial magnetization generates a ≥5.8 kg pull force on steel surfaces, while the polymer layer dampens vibrations and prevents galvanic corrosion when contacting dissimilar metals. Thermal stability is maintained up to 80°C.

1 x 1/4 Inch Neodymium Rare Earth Plastic Coated Countersunk Ring Magnet N42 (#6 screw) Applications

Industrial Mounting: Secure sensors, signs, and tool holders to ferrous surfaces.

Automotive: Trim panel retention, wire harness clips, and access panel fasteners.

Retail Displays: Modular product showcases and magnetic poster systems.

Furniture: Hidden cabinet closures and adjustable shelving supports.

Renewable Energy: Mounting brackets for solar panel components.

1 x 1/4 Inch Neodymium Rare Earth Plastic Coated Countersunk Ring Magnet N42 (#6 screw) Packaging

To ensure safety during transportation and compliance with shipping regulations, all magnets are securely packed with a metal shielding layer inside the box. This prevents magnetic interference with surrounding items and protects the product from external damage.

Packaging: Carton, Wooden Box, or Customized.

1 x 1/4 Inch Neodymium Rare Earth Plastic Coated Countersunk Ring Magnet N42 (#6 screw) FAQs

Q1. What torque can the #6 screw hole withstand?

Max. 0.6 N·m. Exceeding this may crack the magnet. Use washers and avoid overtightening.

Q2. Is the coating resistant to oils/solvents?

Yes, withstands IPA, acetone, and light oils. Avoid prolonged exposure to strong acids (>pH 3).

Q3. Can magnets be stacked for more strength?

Limited, stacking concentrates flux but increases thickness. Use single magnets with steel backplates instead.

Related Information

1. Common Preparation Methods

Countersunk ring magnets are produced by compacting NdFeB powder in ring-shaped dies under a 2.0 T magnetic field. Sintering at 1,080°C fuses particles into dense blanks. Diamond tools machine the 82° countersink and bore to ±0.05 mm tolerance. Polymer coating is applied via fluidized bed deposition: preheated magnets are immersed in thermoplastic powder (nylon/PP), then cured at 180–200°C to form a 0.4 mm uniform layer. After axial magnetization in a 3.2 T pulsed field, each unit undergoes pull-force validation and screw-fit testing with #6 stainless steel screws.