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SKU: NB020-TH

Neodymium Magnets 1/2 x 1/2 x 1/4 inch w/Dual Sided Countersunk Hole

$ 1.95
$ 1.95

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Neodymium Magnets N42 Strong 1/2" x 1/2" x 1/4" Thick with Countersunk Center Hole

Quick Facts

Attribute Value
Magnet Type Neodymium Rare Earth Block Magnet with Countersunk Hole
Grade N42
Shape Block
Length 1/2" (12.7 mm)
Width 1/2" (12.7 mm)
Height 1/4" (6.35 mm)
Pull Force Over 13 lbs
Material NdFeB (Neodymium-Iron-Boron)
Coating Nickel-Copper-Nickel (Ni-Cu-Ni)
Magnetization Through 1/4" Thickness
Br Max 13,200 Gauss
Certification ISO Certified

Quick Answers

Question Answer
How strong is this magnet? Over 13 lbs of pull force under ideal conditions.
Is N42 stronger than N35? Yes. N42 is stronger than N35, N38, and N40 grades.
What is this magnet made of? NdFeB rare earth material.
Can this magnet rust? The nickel-copper-nickel coating helps protect against corrosion, but damaged coating or prolonged moisture exposure may cause rust.
What is it commonly used for? Mounting, fixtures, cabinet closures, displays, assemblies, tooling, DIY projects, and applications requiring screw-mounted magnets.

Product Overview

These N42 neodymium block magnets with countersunk center holes are designed for strong, secure mounting in industrial, commercial, and DIY applications. Measuring 1/2" x 1/2" x 1/4" thick, each magnet provides over 13 lbs of pull force under ideal conditions.

The dual-sided tapered countersunk center hole allows a flat head screw to sit recessed on either side of the magnet. The countersunk hole measures 0.292" x 0.165" with an 82-degree taper and is designed to work with #6 flat head screws.

Made from premium NdFeB rare earth material and coated with a Nickel-Copper-Nickel triple layer finish, these magnets provide excellent durability, corrosion resistance, and consistent magnetic performance. Applied Magnets manufactures these magnets under ISO-certified quality standards for dependable performance.

What Is a Neodymium Block Magnet?

A neodymium block magnet is a rectangular or cube-shaped rare earth permanent magnet made from neodymium, iron, and boron (NdFeB). Block magnets provide strong holding force and a large contact surface, making them ideal for industrial, engineering, manufacturing, and DIY applications.

How Strong Is This Magnet?

This N42 neodymium countersunk block magnet provides over 13 lbs of pull force under ideal conditions. Actual holding strength depends on surface material, steel thickness, air gaps, screw installation, alignment, and application design.

Technical Specifications

Specification Value
Product Name N42 Neodymium Block Magnet with Countersunk Center Hole
Material Neodymium Iron Boron (NdFeB)
Grade N42
Shape Block with Countersunk Hole
Length 1/2" (12.7 mm)
Width 1/2" (12.7 mm)
Thickness 1/4" (6.35 mm)
Hole Type Dual-Sided Tapered Countersunk Center Hole
Countersunk Hole Size 0.292" x 0.165"
Countersink Angle 82 Degrees
Compatible Screw #6 Flat Head Screw
Coating Nickel-Copper-Nickel Triple Layer
Magnetization Direction Through 1/4" Thickness
Pull Force Over 13 lbs
Br Max 13,200 Gauss
Certification ISO Certified

Note: Pull force is an estimate only. Please test this magnet 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
Robotics Motion systems
Electronics Assemblies
Education STEM projects
DIY Custom builds

Common Questions About This Magnet

How much weight can this magnet hold?

This magnet provides over 13 lbs of pull force under ideal conditions. Actual holding strength depends on the application, steel surface, and installation method.

Is N42 stronger than N35?

Yes. N42 magnets are stronger than N35, N38, and N40 magnets of the same size.

Can this magnet be used outdoors?

It may be used outdoors with additional protection, but long-term exposure to moisture or harsh weather is not recommended.

Can it rust?

The Nickel-Copper-Nickel coating helps protect against corrosion. If the coating is scratched, chipped, or exposed to moisture for long periods, rust may develop.

What direction is it magnetized?

This magnet is magnetized through the 1/4" thickness.

What screw does the countersunk hole fit?

The 0.292" x 0.165" 82-degree tapered countersunk hole is designed to work with #6 flat head screws.

Do you offer wholesale pricing?

Yes. Contact Applied Magnets for neodymium magnet wholesale volume discounts.

Safety Notice

Strong neodymium magnets can pinch fingers, chip, break, or interfere with electronics and medical devices. Please read magnet safety information online before purchase and use.

Why Buy From Applied Magnets?

  • Premium NdFeB rare earth magnets

  • Consistent magnetic performance

  • ISO-certified manufacturing

  • Competitive pricing

  • Wholesale discounts available

  • Strong countersunk mounting design

Frequently Bought Together

Total price$ 3.76
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