3/8" x 3/16" N42 Neodymium Disc Magnets – Strong Rare Earth Magnets
Quick Facts
| Attribute |
Value |
| Magnet Type |
Neodymium Rare Earth Disc Magnet |
| Grade |
N42 |
| Shape |
Disc |
| Diameter |
3/8" (0.375") |
| Thickness |
3/16" (0.1875") |
| Pull Force |
Over 8 lbs |
| Material |
NdFeB (Neodymium-Iron-Boron) |
| Coating |
Nickel-Copper-Nickel (Ni-Cu-Ni) Triple Layer |
| Magnetization |
Through Thickness |
| Br Max |
13,200 Gauss |
| Certification |
ISO Certified |
Quick Answers
| Question |
Answer |
| How strong is this magnet? |
Approximately 8 lbs of pull force, providing reliable holding power in a compact size. |
| What is this magnet made of? |
NdFeB (Neodymium-Iron-Boron) rare earth material. |
| Is this stronger than N35 magnets? |
Yes. N42 offers significantly greater magnetic strength than N35, N38, and N40 magnets of the same size. |
| Can it be used outdoors? |
Yes, but prolonged exposure to moisture may eventually cause corrosion. For permanent outdoor use, additional protective sealing is recommended. |
| What is it commonly used for? |
Magnetic holding, closures, woodworking, crafts, embedded mounting, and organizing tools or hardware. |
Product Overview
These 3/8" x 3/16" N42 Neodymium Disc Magnets are designed to provide dependable holding power in a compact footprint. The 3/8-inch diameter offers excellent surface contact, while the thicker 3/16-inch profile delivers increased magnetic strength and stability compared to thinner disc magnets of the same diameter.
Manufactured from premium N42 grade rare earth neodymium, these magnets provide an excellent balance of strength, durability, and ease of handling. They're ideal for light to moderate-duty applications including magnetic closures, woodworking, fixtures, DIY projects, and shop organization.
Each magnet is finished with a durable Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer coating that helps resist wear, chipping, and corrosion while providing a smooth, polished metallic finish.
What Is a Neodymium Disc Magnet?
A neodymium disc magnet is a circular permanent magnet made from NdFeB (Neodymium-Iron-Boron), the world's strongest commercially available magnetic material. Disc magnets are magnetized through their thickness, placing the north and south poles on the two flat faces to produce maximum holding force across the contact surface.
Their compact size and exceptional strength make them ideal for manufacturing, electronics, woodworking, robotics, educational projects, and countless DIY applications.
How Strong Is This Magnet?
This 3/8" x 3/16" N42 disc magnet produces approximately 8 pounds of pull force under ideal conditions using a thick, clean steel surface.
Its thicker design stores more magnetic energy than thinner disc magnets of the same diameter, making it an excellent choice whenever additional holding strength is needed without increasing the magnet's overall footprint.
Technical Specifications
| Specification |
Value |
| Magnet Type |
Neodymium Rare Earth |
| Grade |
N42 |
| Shape |
Disc |
| Diameter |
3/8" |
| Thickness |
3/16" |
| Material |
NdFeB |
| Coating |
Nickel-Copper-Nickel Triple Layer |
| Magnetization |
Through Thickness |
| Pull Force |
Over 8 lbs |
| Br Max |
13,200 Gauss |
| Certification |
ISO Certified |
Nickel-Copper-Nickel vs. Epoxy Coating
Our magnets feature a Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer coating, providing significantly greater durability than standard epoxy-coated magnets.
Nickel-Copper-Nickel Triple Coating Benefits
- Superior scratch resistance
- Excellent chip and crack resistance
- Greater durability during repeated use
- Smooth, polished metallic finish
- Better long-term corrosion protection under normal conditions
Epoxy Single-Layer Coating
Epoxy coatings provide a thin plastic protective layer but can wear more quickly with repeated use. Even small scratches can compromise the coating over time. Nickel-Copper-Nickel plating offers superior resistance to chipping, cracking, and everyday wear, making it the preferred choice for demanding applications.
Magnet Grade Comparison
| Grade |
Relative Strength |
Typical Applications |
| N35 |
Standard |
General purpose |
| N38 |
Moderate |
Consumer products |
| N40 |
High |
Industrial |
| N42 |
Higher |
Engineering and industrial applications |
| N52 |
Maximum |
High-performance applications |
Disc Magnet Size Comparison
| Size |
Typical Use |
| Small |
Crafts, sensors, miniature electronics |
| Medium |
General holding, closures, woodworking |
| 3/8" x 3/16" |
Heavy-duty crafts, fixtures, embedded mounting |
| Large |
Industrial mounting and fabrication |
Applications by Industry
| Industry |
Common Uses |
| Manufacturing |
Fixtures, jigs, holding devices |
| Robotics |
Sensors and positioning systems |
| Electronics |
Components and assemblies |
| Education |
STEM projects and demonstrations |
| DIY |
Crafts, woodworking, home organization |
Common Questions About This Magnet
What is the pull force?
This magnet provides approximately 8 pounds of pull force under ideal conditions.
Is N42 stronger than N35?
Yes. N42 offers noticeably greater magnetic strength than N35 magnets of the same size.
Can it rust?
Yes. Neodymium magnets contain iron and may corrode if the protective coating is damaged or exposed to harsh environments for extended periods.
Can it be used outdoors?
Yes, but for long-term outdoor or marine applications, additional protective sealing is recommended.
What direction is it magnetized?
This magnet is magnetized through its thickness, with the north and south poles located on the two flat circular faces.
Do you offer bulk discounts?
Yes. Contact Super Magnet Store for wholesale pricing and volume discounts on large quantity orders.
Why Buy From Super Magnet Store?
- Premium NdFeB rare earth magnets
- ISO-certified quality
- Consistent magnetic performance
- High-strength N42 grade
- Durable Nickel-Copper-Nickel triple-layer coating
- Competitive wholesale pricing
- Bulk discounts available
- Trusted supplier serving industrial, commercial, and DIY customers worldwide
