N42 neodymium block magnet measuring 2 × 1 × 1/2 inch. Through-thickness magnetization with Ni-Cu-Ni plating, 5,499.69 gauss surface field, and a listed 139.68 lb pull force. SKU 8309.
N42 neodymium block magnet measuring 2 × 1 × 1/2 inch (SKU 8309) provides a large rectangular working face for fixtures, magnetic separation, holding, prototypes, and industrial assemblies. It is magnetized through the 1/2-inch thickness.
| Magnet size | 2" × 1" × 1/2" |
| Tolerances | ±0.004" |
| Material | Rare-earth NdFeB |
| Grade | N42 |
| Coating | Ni-Cu-Ni |
| Br (typical) | 13,150 gauss |
| BHmax (typical) | 42 MGOe |
| Maximum operating temperature | 80°C / 176°F |
| Magnetization direction | Through thickness |
| Surface field | 5,499.69 gauss |
| Listed pull force | 139.68 lb |
The listed pull force is a comparison value under defined axial pull-off conditions, not a universal safe working load. Air gaps, target-steel thickness, surface finish, contact area, load direction, vibration, and temperature can reduce usable holding force.
This large N42 block can create severe pinch hazards and may chip if allowed to snap against another magnet or steel surface. Use nonmagnetic spacers, controlled handling fixtures, and an appropriate engineering safety factor during assembly and testing.
Use the Magnet Pull Force Calculator for preliminary estimates and compare grades in the Neodymium Magnet Grade Chart.
Browse more block magnets, or submit the Magnet RFQ Builder for production quantities or a custom requirement.

| Weight | 0.270955 lbs |
|---|---|
| Dimensions | 2 × 1 × 0.5 in |
| Pull Force | 100lbs-200lbs |
| Shape | Block / Bar |
8309 – Drawing PDF Format
8309 – Certificate of Compliance
8309 – Neodymium Properties Chart
8309 – Magnet Manufacturing Process
8309 – REACH Report
8309 – ROHS Report
If you can’t find what you want, just send us an inquiry and we will be happy to make it for you!
| Surface | Coating | Thickness(microns) | Color | Resistance |
|---|---|---|---|---|
| Passivation | 1 | Silver Grey | Temporary Protection | |
| Nickel | Ni Ni Ni Cu Ni |
10-20 | Bright Silver | Excellent Against Humidity |
| Zinc | Zn Cu Zn |
8-20 | Bright Blue Shinny Color |
Good Against Salt Spray Excellent against Salt Spray |
| Tin | Ni Cu Sn | 15-20 | Silver | Superior Against Humidity |
| Gold | Ni Cu Au | 10-20 | Gold | Superior Against Humidity |
| Copper | Ni Cu | 10-20 | Gold | Temporary Protection |
| Epoxy | Epoxy Ni Cu Epoxy Zn Epoxy |
15-25 | Black, Red, Grey |
Excellent Against Humidity & Salt Spray |
| Chemical | Ni | 10-20 | Silver grey | Excellent Against Humidity |

396 in stock (can be backordered)
| Title | Quantity | Price Per Magnet |
|---|---|---|
| Quantity Discounts | 1 - 9 | 0% $30.00 |
| Quantity Discounts | 10 - 49 | 6.15% $28.16 |
| Quantity Discounts | 50 - 99 | 10% $27.00 |
| Quantity Discounts | 100 - 999 | 15% $25.50 |
| Quantity Discounts | 1000 - 4999 | 30% $21.00 |
| Quantity Discounts | 5000 - 9999 | 40% $18.00 |
| Quantity Discounts | 10000 + | 50% $15.00 |
Custom magnets and magnetic assemblies, factory-direct. PPAP and ISO 9001 documentation available.
Start a Custom Order →10M+ magnets stocked on both coasts, fixed-rate pricing up to 1 year, credit terms and blanket orders.
Talk to Sales →Start with Magnets 101, work up to 201, then test yourself against the grade selector in the Knowledge Base.
Open the Knowledge Base →The 26 most-used guides are listed here. The full library runs to 68 guides and 29 tools, all filterable in one place.
Browse All Resources →Our free iOS app puts the full catalog and tools in your pocket.
Download on the App Store →True radial magnetization, ISO 9001, U.S. inventory on both coasts, same-day shipping by 2PM EST.
Why Radial Magnets →