Neodymium Magnets N42 Grade 1" x 1" x 1/4" Thick Block Magnet with Center 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" (25.4 mm) |
| Height |
1/4" (6.35 mm) |
| Pull Force |
Over 28 lbs |
| Material |
NdFeB (Neodymium-Iron-Boron) |
| Coating |
Nickel-Copper-Nickel (Ni-Cu-Ni) |
| Magnetization |
Through Thickness |
| Br Max |
13,200 Gauss |
| Certification |
ISO Certified |
Quick Answers
| Question |
Answer |
| How strong is this magnet? |
Over 28 lbs of pull force under ideal conditions. |
| Is N42 stronger than N35? |
Yes. N42 is 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 moisture exposure or coating damage may eventually lead to corrosion. |
| What is it commonly used for? |
Cabinet doors, industrial fixtures, wall mounting, woodworking projects, magnetic catches, displays, and automation equipment. |
Product Overview
Neodymium magnets are the world's strongest commercially available permanent magnets. Super Magnet Store offers premium-quality N42 neodymium magnets manufactured to stringent quality standards using advanced production technology. These magnets provide exceptional holding power, dependable performance, and long-term durability for industrial, commercial, and engineering applications.
This N42 neodymium block magnet measures 1" x 1" x 1/4" and features a dual-sided countersunk center hole for secure mounting. The center hole measures 0.36" x 0.195" with an 82-degree taper and is designed to work with #8 flat head screws. The countersink is machined on both sides, allowing the screw head to sit recessed regardless of installation direction.
With over 28 lbs of pull force, this magnet is ideal for permanent mounting applications requiring both strong magnetic holding power and mechanical fastening. 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 strong holding force and a large contact surface area, making them ideal for industrial equipment, manufacturing fixtures, cabinetry, engineering projects, displays, robotics, and automation systems.
How Strong Is This Magnet?
This N42 neodymium countersunk block magnet generates over 28 lbs of pull force under ideal conditions. Actual holding strength depends on steel thickness, surface finish, air gaps, mounting configuration, and environmental conditions. With a Br Max rating of 13,200 Gauss, it delivers powerful magnetic performance in a versatile mounting design.
Technical Specifications
| Specification |
Value |
| Product Name |
N42 Neodymium Block Magnet with Countersunk Center Hole |
| Material |
Neodymium Iron Boron (NdFeB) |
| Grade |
N42 |
| Shape |
Block |
| Length |
1" (25.4 mm) |
| Width |
1" (25.4 mm) |
| Thickness |
1/4" (6.35 mm) |
| Hole Type |
Dual-Sided Countersunk Center Hole |
| Countersunk Hole Size |
0.36" x 0.195" |
| Countersink Angle |
82 Degrees |
| Compatible Screw |
#8 Flat Head Screw |
| Coating |
Nickel-Copper-Nickel Triple Layer |
| Magnetization Direction |
Through Thickness (1/4") |
| Pole Orientation |
On the 1" x 1" Faces |
| Pull Force |
Over 28 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 & Closures |
| Large Blocks |
Industrial assemblies |
Applications by Industry
| Industry |
Common Uses |
| Manufacturing |
Fixtures & tooling |
| Cabinetry |
Magnetic catches & closures |
| Retail Displays |
Hidden mounting systems |
| Engineering |
Product development |
| Automation |
Positioning systems |
| Robotics |
Motion systems |
| DIY |
Custom mounting projects |
Common Questions About This Magnet
How much weight can this magnet hold?
This magnet provides over 28 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.
What screw fits the countersunk hole?
The 0.36" x 0.195" 82-degree dual countersunk center hole is designed for use with #8 flat head screws.
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 1/4-inch thickness, with the north and south poles located on the 1" x 1" faces.
Do you offer wholesale pricing?
Yes. Contact Super Magnet Store for competitive volume pricing and wholesale discounts on neodymium 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. Must 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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Secure countersunk mounting design
-
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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Reliable strength for industrial and engineering applications
