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BOOM

BOOM 12x3mm Round Disc N42 Magnets 50-Pack

★★★★★4.4 (33 reviews)
8 inch5.5 lb

Versatile and Powerful Neodymium Disc MagnetsThese Round Disc Magnets are perfect for a variety of applications, from DIY projects to office organization. Made from strong neodymium material, these magnets provide a secure and reliable hold for various tasks. Size: 12x3mm (1/2" x 1/8") Material...

$24.49*
✓ In Stock on Amazon.com
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

Versatile and Powerful Neodymium Disc Magnets

These Round Disc Magnets are perfect for a variety of applications, from DIY projects to office organization. Made from strong neodymium material, these magnets provide a secure and reliable hold for various tasks.

  • Size: 12x3mm (1/2" x 1/8")
  • Material: Neodymium N42
  • Quantity: 50 Pack

Key Features

DIMENSIONS AND PULL FORCE – 12x3mm (1/2x1/8 inch) N42 neodymium discs with up to 5.5 lb pull force on flat steel; compact profile fits flush-mount cavities, thin assemblies, and embedded builds

RELIABLE HOLD FOR ORGANIZATION – Secure notes, charts, or lightweight tools on fridges, steel panels, whiteboards, and office boards; slim form sits flush against the surface without protruding

VERSATILE FOR CRAFTS AND BUILDS – Embed in wood, plastic, or 3D-printed parts for removable closures; position photos or fabric pieces without adhesive; integrate into cosplay props, display mounts, or models

TRIPLE-LAYER COATING – Ni-Cu-Ni plating resists abrasion and indoor humidity; smooth finish reduces surface contact friction, protecting painted and laminated surfaces during repeated repositioning

N42 GRADE PERFORMANCE – N42 grade delivers approximately 20% higher pull force than standard N35 commodity discs at the same 12x3mm footprint, providing a stronger hold without upsizing

Specifications

Brand
BOOM
Quantity
50-Pack
Magnet Type
Neodymium Disc
Dimensions
12x3mm (1/2x1/8 inch)
Grade
N42
Pull Force
Up to 5.5 lb (on flat steel)
Coating
Triple-layer Ni-Cu-Ni plating

Pros & Cons

👍 Pros

  • Features N42 grade neodymium magnets, delivering approximately 20% higher pull force than standard N35 discs of the same size.
  • Each magnet has a compact 12x3mm (1/2x1/8 inch) profile, ideal for flush-mount cavities and thin assemblies.
  • Offers a reliable hold with up to 5.5 lb pull force on flat steel, suitable for organizing and securing lightweight items.
  • Equipped with a triple-layer Ni-Cu-Ni plating that resists abrasion and indoor humidity, enhancing durability.
  • The smooth finish of the plating reduces surface contact friction, protecting surfaces during repeated repositioning.
  • Versatile for various applications, including crafts, models, cosplay props, and embedded builds in different materials.
  • Comes in a convenient 50-pack, providing a generous quantity for multiple projects or extensive organization.

👎 Cons

  • The pull force of 5.5 lb is specified for flat steel, and may vary on other surfaces or with non-ideal contact.
  • While N42 grade is stronger than N35, the specific magnetic strength may not be sufficient for very heavy-duty applications.
  • The compact size of 12x3mm, while versatile, means these magnets are small and could be easily misplaced.
  • The Ni-Cu-Ni plating offers resistance to indoor humidity but may not be fully impervious to prolonged exposure to outdoor elements.
  • Embedding these magnets in materials like wood or plastic requires precise drilling or molding to fit their specific dimensions.

Frequently Asked Questions

These BOOM 12x3mm N42 neodymium disc magnets have a pull force of up to 5.5 lb on flat steel.
The triple-layer Ni-Cu-Ni plating resists abrasion and indoor humidity, but prolonged outdoor exposure is not specifically addressed for full immunity.
Each magnet in the 50-pack measures 12x3mm, which is approximately 1/2x1/8 inch.
The N42 grade delivers approximately 20% higher pull force than standard N35 commodity discs with the same 12x3mm footprint.
Yes, these magnets are versatile for crafts and builds, suitable for embedding in wood, plastic, or 3D-printed parts, and positioning various items.
These magnets feature a triple-layer Ni-Cu-Ni plating, designed to resist abrasion and indoor humidity, and provide a smooth finish.

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