Rare Earth Magnets N42 Grade 1" x 1/2" x 1/2" Thick Neodymium Block Magnet with One Countersunk Hole
Quick Facts
| Attribute |
Value |
| Magnet Type |
Neodymium Rare Earth Block Magnet with Countersunk Hole |
| Grade |
N42 |
| Shape |
Block |
| Length |
1" (25.4 mm) |
| Width |
1/2" (12.7 mm) |
| Height |
1/2" (12.7 mm) |
| Pull Force |
Approx. 37 lbs |
| Material |
NdFeB (Neodymium-Iron-Boron) |
| Coating |
Nickel-Copper-Nickel (Ni-Cu-Ni) |
| Magnetization |
Through 1/2" Thickness |
| Br Max |
13,200 Gauss |
| Certification |
ISO Certified |
Quick Answers
| Question |
Answer |
| How strong is this magnet? |
Approximately 37 lbs of pull force under ideal conditions. |
| Is N42 stronger than N35? |
Yes. N42 is significantly stronger than N40, N38, and N35 grades. |
| What is this magnet made of? |
NdFeB (Neodymium-Iron-Boron) rare earth material. |
| Can this magnet rust? |
The Nickel-Copper-Nickel coating provides excellent corrosion resistance, but prolonged exposure to moisture or coating damage may eventually lead to corrosion. |
| What is it commonly used for? |
Industrial fixtures, heavy-duty mounting, cabinetry, displays, tooling, robotics, automation systems, and engineering assemblies. |
Product Overview
Rare earth neodymium NdFeB magnets are the world's strongest commercially available permanent magnets. Super Magnet Store offers premium-quality N42 rare earth magnets manufactured to stringent quality standards using advanced production technology. These magnets deliver exceptional holding power, reliable performance, and long-term durability for industrial, commercial, and engineering applications.
This N42 neodymium block magnet measures 1" x 1/2" x 1/2" and features one center countersunk mounting hole. The hole is tapered on both sides of the magnet, allowing a flat head screw to sit flush from either side. The dual countersunk center hole measures 0.29" x 0.155" with an 82-degree taper and is designed to work with #6 flat head screws.
With an impressive 37 lbs of pull force, this magnet is ideal for permanent mounting applications requiring secure fastening and exceptional magnetic holding power. The durable Nickel-Copper-Nickel triple-layer coating provides enhanced corrosion resistance and long service life.
What Is a Neodymium Block Magnet?
A neodymium block magnet is a rectangular rare earth permanent magnet made from neodymium, iron, and boron (NdFeB). Block magnets provide exceptional holding force and a large contact surface area, making them ideal for industrial equipment, manufacturing fixtures, engineering projects, cabinetry, displays, robotics, and custom magnetic assemblies.
How Strong Is This Magnet?
This N42 neodymium countersunk block magnet generates approximately 37 lbs of pull force under ideal conditions. Actual holding strength depends on steel thickness, surface condition, air gaps, screw installation, and application design. With a Br Max rating of 13,200 Gauss, it provides powerful magnetic performance and secure mounting capability.
Technical Specifications
| Specification |
Value |
| Product Name |
N42 Neodymium Block Magnet with One Countersunk Hole |
| Material |
Neodymium Iron Boron (NdFeB) |
| Grade |
N42 |
| Shape |
Block |
| Length |
1" (25.4 mm) |
| Width |
1/2" (12.7 mm) |
| Thickness |
1/2" (12.7 mm) |
| Number of Holes |
1 |
| Hole Type |
Dual-Sided Countersunk Center Hole |
| Countersunk Hole Size |
0.29" x 0.155" |
| Countersink Angle |
82 Degrees |
| Compatible Screw |
#6 Flat Head Screw |
| Coating |
Nickel-Copper-Nickel Triple Layer |
| Magnetization Direction |
Through 1/2" Thickness |
| Pull Force |
Approx. 37 lbs |
| Br Max |
13,200 Gauss |
| Certification |
ISO Certified |
| Operating Temperature |
Up to 176°F (80°C) |
Note: Pull force is an estimate only and should be tested for your specific application.
Magnet Grade Comparison
| Grade |
Relative Strength |
Typical Applications |
| N35 |
Standard |
General purpose |
| N38 |
Moderate |
Consumer products |
| N40 |
High |
Industrial |
| N42 |
Higher |
Engineering |
| N52 |
Maximum |
High-performance |
Block Magnet Size Comparison
| Size |
Typical Applications |
| Small Blocks |
Electronics |
| Medium Blocks |
Fixtures |
| Large Blocks |
Industrial assemblies |
Applications by Industry
| Industry |
Common Uses |
| Manufacturing |
Fixtures & tooling |
| Engineering |
Product development |
| Cabinetry |
Magnetic closures |
| Retail Displays |
Hidden mounting systems |
| Robotics |
Motion systems |
| Automation |
Positioning systems |
| DIY |
Custom mounted projects |
Common Questions About This Magnet
How much weight can this magnet hold?
This magnet provides approximately 37 lbs of pull force under ideal conditions. Actual holding capacity depends on the mounting surface, installation method, and application design.
Is N42 stronger than N35?
Yes. N42 magnets provide substantially greater magnetic energy and holding force than N35 magnets of the same dimensions.
Can this magnet be used outdoors?
The Nickel-Copper-Nickel coating provides corrosion resistance, but additional protection is recommended for prolonged outdoor exposure.
Can it rust?
The protective nickel coating helps resist corrosion; however, moisture exposure and coating damage can eventually result in rust.
What direction is it magnetized?
This magnet is magnetized through the 1/2-inch thickness, with the north and south poles located on the 1" x 1/2" surfaces.
What screw fits the countersunk hole?
The 0.29" x 0.155" 82-degree dual countersunk hole is designed for use with #6 flat head screws.
Do you offer wholesale pricing?
Yes. Contact Super Magnet Store for competitive volume pricing and wholesale discounts on rare earth magnets.
Safety Notice
Strong neodymium magnets can pinch fingers, chip, crack, or shatter if allowed to collide with metal objects or other magnets. Keep away from children, pacemakers, sensitive electronics, and magnetic storage devices. Please read magnet safety information before purchase and use.
Why Buy From Super Magnet Store?
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Premium NdFeB rare earth magnets
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Consistent magnetic performance
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ISO-certified manufacturing
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Competitive pricing
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Wholesale discounts available
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Superior quality and performance guaranteed
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Secure dual-sided countersunk mounting design
