N42 Neodymium Disc Magnet 5/16" x 1/4" Rare Earth Magnet
Quick Facts
| Attribute |
Value |
| Magnet Type |
Neodymium Rare Earth Disc Magnet |
| Grade |
N42 |
| Shape |
Disc |
| Diameter |
5/16 inch (0.3125") |
| Thickness |
1/4 inch (0.250") |
| Pull Force |
Approx. 7.5 lbs or more |
| Material |
NdFeB (Neodymium-Iron-Boron) |
| Coating |
Nickel-Copper-Nickel Triple Layer |
| Magnetization |
Through Thickness |
| Br Max |
13,500 Gauss |
| BH Max |
45 MGOe |
| Certification |
ISO Certified |
Quick Answers
| Question |
Answer |
| How strong is this magnet? |
Approximately 7.5 lbs or more of pull force under ideal conditions. |
| What is this magnet made of? |
NdFeB (Neodymium-Iron-Boron) rare earth material. |
| Is this stronger than N35 magnets? |
Yes. N42 magnets provide greater magnetic strength than N35, N38, and N40 magnets of the same size while offering an excellent balance of performance and value. |
| Can it be used outdoors? |
Yes. The Nickel-Copper-Nickel triple-layer coating provides excellent corrosion resistance. For continuous outdoor or marine environments, additional sealing is recommended. |
| What is it commonly used for? |
Magnetic closures, woodworking, fixtures, electronics, displays, organization, crafts, and DIY projects. |
Product Overview
The N42 Neodymium Disc Magnet 5/16" x 1/4" delivers impressive holding power in a compact, easy-to-install package. Featuring a 5/16-inch diameter and a thicker 1/4-inch profile, this rare earth magnet generates a deeper magnetic field and significantly greater holding force than thinner disc magnets, making it ideal for applications requiring a secure, dependable hold.
Manufactured from premium N42 grade NdFeB (Neodymium-Iron-Boron), these disc magnets provide reliable magnetic performance for woodworking, electronics, magnetic closures, fixtures, product assembly, displays, and countless DIY projects. The combination of compact size and increased thickness makes them an excellent choice for applications where strength matters without requiring a larger diameter.
Each magnet is protected by a durable Nickel-Copper-Nickel triple-layer coating that resists corrosion, oxidation, and everyday wear while maintaining a smooth, polished finish. Precision manufactured and ISO Certified, these magnets deliver consistent performance for industrial, commercial, and hobby applications.
What Is a Neodymium Disc Magnet?
A neodymium disc magnet is a circular permanent magnet manufactured from neodymium, iron, and boron (NdFeB). These rare earth magnets produce exceptional magnetic strength while maintaining a compact size, making them one of the most versatile permanent magnets available.
Disc magnets are commonly used in woodworking, manufacturing, electronics, magnetic closures, retail displays, sensors, crafts, and embedded assemblies because they provide excellent holding power with a simple, low-profile design.
How Strong Is This Magnet?
This N42 neodymium disc magnet generates approximately 7.5 pounds or more of pull force under ideal conditions against a thick, flat steel surface. Its 1/4-inch thickness creates a deeper magnetic field than thinner discs, providing substantially greater holding strength for demanding applications.
With a Br Max of 13,500 Gauss and a BH Max of 45 MGOe, this magnet delivers dependable magnetic performance across a wide range of industrial, commercial, and DIY projects.
Technical Specifications
| Property |
Specification |
| Material |
Neodymium (NdFeB) |
| Grade |
N42 |
| Shape |
Disc |
| Diameter |
0.3125 inch (5/16") |
| Thickness |
0.250 inch (1/4") |
| Br Max |
13,500 Gauss |
| BH Max |
45 MGOe |
| Pull Force |
Approx. 7.5 lbs or more |
| Coating |
Nickel-Copper-Nickel Triple Layer |
| Magnetization |
Through Thickness (poles on the two flat surfaces) |
| Certification |
ISO Certified |
Magnet Grade Comparison
| Grade |
Relative Strength |
Typical Applications |
| N35 |
Standard |
General purpose |
| N38 |
Moderate |
Consumer products |
| N40 |
High |
Industrial |
| N42 |
Higher |
Engineering, electronics, woodworking |
| N52 |
Maximum |
High-performance engineering and precision manufacturing |
Disc Magnet Size Comparison
| Size |
Typical Use |
| Small |
Crafts & sensors |
| Medium |
General holding |
| Large |
Industrial mounting |
Applications by Industry
| Industry |
Common Uses |
| Manufacturing |
Fixtures, positioning, assembly tooling |
| Robotics |
Sensors and positioning systems |
| Electronics |
Components, enclosures, switches |
| Education |
STEM projects and demonstrations |
| DIY |
Woodworking, magnetic closures, crafts, organization, models |
Common Questions About This Magnet
What is the pull force?
This magnet provides approximately 7.5 pounds or more of pull force under ideal conditions against a thick steel surface.
Is N42 stronger than N35?
Yes. N42 magnets deliver noticeably greater magnetic strength than N35 magnets while offering excellent value for professional and DIY applications.
Can it rust?
Like all neodymium magnets, the core material can corrode if exposed. The Nickel-Copper-Nickel triple-layer coating provides outstanding protection against moisture, oxidation, and everyday wear.
Can it be used outdoors?
Yes. The triple-layer nickel coating offers excellent corrosion resistance. For long-term outdoor or marine use, an additional protective sealant 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. Super Magnet Store offers competitive wholesale pricing and quantity discounts for manufacturers, distributors, educational institutions, retailers, and OEM customers.
Why Buy From Super Magnet Store?
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Premium NdFeB rare earth magnets
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ISO-certified quality
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Reliable N42 magnetic performance
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Durable Nickel-Copper-Nickel triple-layer coating
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Excellent corrosion resistance
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Precision manufacturing tolerances
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Consistent magnetic performance
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Bulk discounts available
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Fast shipping from a trusted magnet supplier
