---
product_id: 57260768
title: "N42 Neodymium Arc Magnet for Engineering, Manufacturing, DIY and Motors - 5kg Pull - 20mm O.R. x 12.5mm I.R. x 90 Degree x 5mm thick - Pack of 4"
brand: "first4magnets"
price: "$6.74"
currency: USD
in_stock: true
reviews_count: 6
category: "First4 Magnets"
url: https://www.desertcart.us/products/57260768-n42-neodymium-arc-magnet-for-engineering-manufacturing-diy-and-motors
store_origin: US
region: United States of America
---

# 90° arc for perfect circle assembly 5kg pull force Triple-layer corrosion resistance N42 Neodymium Arc Magnet for Engineering, Manufacturing, DIY and Motors - 5kg Pull - 20mm O.R. x 12.5mm I.R. x 90 Degree x 5mm thick - Pack of 4

**Brand:** first4magnets
**Price:** $6.74
**Availability:** ✅ In Stock

## Summary

> 🧲 Unlock Magnetic Mastery with Every Arc!

## Quick Answers

- **What is this?** N42 Neodymium Arc Magnet for Engineering, Manufacturing, DIY and Motors - 5kg Pull - 20mm O.R. x 12.5mm I.R. x 90 Degree x 5mm thick - Pack of 4 by first4magnets
- **How much does it cost?** $6.74 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/57260768-n42-neodymium-arc-magnet-for-engineering-manufacturing-diy-and-motors)

## Best For

- first4magnets enthusiasts

## Why This Product

- Trusted first4magnets brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Yet Mighty:** 20mm outer radius and 5mm thickness pack serious magnetic punch in a small footprint.
- • **Precision 90° Arc Design:** Easily combine four magnets to form a flawless magnetic circle for custom projects.
- • **Powerful 5kg Magnetic Grip:** Securely holds heavy components with industrial-grade strength.
- • **Versatile Engineering Essential:** Ideal for DIY, manufacturing, motors, and creative applications demanding reliability.
- • **Triple-Layer Nickel-Copper-Nickel Coating:** Engineered for superior corrosion resistance and a sleek, polished finish.

## Overview

The N42 Neodymium Arc Magnet pack includes four precision-engineered 90° arc magnets, each delivering a robust 5kg pull force. Featuring a durable triple-layer nickel-copper-nickel coating, these 20mm x 5mm magnets resist corrosion while enabling seamless assembly into full circles, making them perfect for engineering, manufacturing, and advanced DIY projects.

## Description

N42 Neodymium Arc Magnet for Engineering, Manufacturing, DIY and Motors - 5kg Pull - 20mm O.R. x 12.5mm I.R. x 90 Degree x 5mm thick - Pack of 4 : desertcart.co.uk: Business, Industry & Science

Review: Very good product. - Good quality, fits exactly the curves of my car windows and the hold extremely well. (I'm lucky I didn't order the stronger one's). Fast delivery and very good packaging was a bonus.
Review: Woooww petits mais très puissants. Rien à redire, il faut juste faire attention we les stocker et manipuler loin de votre portable ou tout ce que le magnétisme peut endommager ou tout produit métallique àcause de la force d'attraction. Pour les détacher, bien penser à les faire glisser et suivre les recommandations.

## Features

- STRONG NEODYMIUM MAGNET. Each magnet can support a 5kg pull vertically from the magnetic face when in flush contact with a mild steel surface of equal thickness.
- PREMIUM COATING & MATERIALS. Each magnet is coated with three layers of nickel, copper and nickel to give superior corrosion resistance and provide a smooth and clean finish.
- CREATE A FULL CIRCLE. 90-degree curvature. Four of these are required to create a full circle.
- SPECIFICATIONS. 20mm O.R. x 12.5mm I.R. x 90 Degree x 5mm thick. 5kg Pull.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00TACMQDI |
| Brand | FIRST4MAGNETS |
| Colour | Silver |
| Country Of Origin | China |
| Customer Reviews | 4.0 4.0 out of 5 stars (393) |
| Global Trade Identification Number | 05055641201786 |
| Included Components | Magnets |
| Item Dimensions L x W x Thickness | 20L x 13W x 5Th millimetres |
| Item Shape | Rectangular |
| Item Thickness | 5 Millimetres |
| Item Type Name | 20mm O.R. x 12.5mm I.R. x 90 Degree x 5mm thick N42 Neodymium Arc Magnet - 5kg Pull ( Pack of 4 ) |
| Item Weight | 0.02 Kilograms |
| Manufacturer | Magnet Expert® |
| Manufacturer Part Number | ARC4025-4 |
| Material Type | Neodymium |
| Model Number | ARC4025-4 |
| Number of Pieces | 4 |
| Pull Force | 5 Kilograms |
| Unit Count | 4.0 count |

## Product Details

- **Brand:** FIRST4MAGNETS
- **Colour:** Silver
- **Material:** Neodymium
- **Product dimensions:** 20L x 13W x 5Th millimetres
- **Shape:** Rectangular

## Images

![N42 Neodymium Arc Magnet for Engineering, Manufacturing, DIY and Motors - 5kg Pull - 20mm O.R. x 12.5mm I.R. x 90 Degree x 5mm thick - Pack of 4 - Image 1](https://m.media-amazon.com/images/I/61d4skm17vL.jpg)
![N42 Neodymium Arc Magnet for Engineering, Manufacturing, DIY and Motors - 5kg Pull - 20mm O.R. x 12.5mm I.R. x 90 Degree x 5mm thick - Pack of 4 - Image 2](https://m.media-amazon.com/images/I/51ty1XoRHhL.jpg)
![N42 Neodymium Arc Magnet for Engineering, Manufacturing, DIY and Motors - 5kg Pull - 20mm O.R. x 12.5mm I.R. x 90 Degree x 5mm thick - Pack of 4 - Image 3](https://m.media-amazon.com/images/I/71r08P1OIzL.jpg)
![N42 Neodymium Arc Magnet for Engineering, Manufacturing, DIY and Motors - 5kg Pull - 20mm O.R. x 12.5mm I.R. x 90 Degree x 5mm thick - Pack of 4 - Image 4](https://m.media-amazon.com/images/I/61lrTVNxRUL.jpg)
![N42 Neodymium Arc Magnet for Engineering, Manufacturing, DIY and Motors - 5kg Pull - 20mm O.R. x 12.5mm I.R. x 90 Degree x 5mm thick - Pack of 4 - Image 5](https://m.media-amazon.com/images/I/61JOn4KnkjL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very good product.
*by C***S on 27 April 2020*

Good quality, fits exactly the curves of my car windows and the hold extremely well. (I'm lucky I didn't order the stronger one's). Fast delivery and very good packaging was a bonus.

### ⭐⭐⭐⭐⭐ Review
*by B***I on 20 September 2019*

Woooww petits mais très puissants. Rien à redire, il faut juste faire attention we les stocker et manipuler loin de votre portable ou tout ce que le magnétisme peut endommager ou tout produit métallique àcause de la force d'attraction. Pour les détacher, bien penser à les faire glisser et suivre les recommandations.

### ⭐⭐⭐ Review
*by R***L on 16 December 2021*

Recibí 2 plaquetas de hierro y 4 imanes curvados fuertes.

## Frequently Bought Together

- N42 Neodymium Arc Magnet for Engineering, Manufacturing, DIY and Motors - 5kg Pull - 20mm O.R. x 12.5mm I.R. x 90 Degree x 5mm thick - Pack of 4
- eSUN PLA+ Filament 1.75mm, Enhanced Toughness 3D Printer Filament PLA Plus, Dimensional Accuracy +/- 0.03mm, 1KG Spool (2.2 LBS) 3D Printing Filament for 3D Printers, Magenta
- FINDMAG 50 Pcs 5 mm x 1 mm Strong Magnets, Neodymium Magnets, Magnet for Whiteboard, Round Magnet for Photos, Tools, Whiteboard, Home

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.us/products/57260768-n42-neodymium-arc-magnet-for-engineering-manufacturing-diy-and-motors](https://www.desertcart.us/products/57260768-n42-neodymium-arc-magnet-for-engineering-manufacturing-diy-and-motors)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-05-20*