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1/2 x 1/2 x 1/4 Inch Neodymium Rare Earth Double-Sided Countersunk Block Magnets N52 (10 Pack)

1/2 x 1/2 x 1/4 Inch N52 neodymium double-sided countersunk block magnets, nickel-plated, lined up, countersunk holes visible

1/2 x 1/2 x 1/4 Inch Neodymium Rare Earth Double-Sided Countersunk Block Magnets N52 (10 Pack)

  • $ 20.79 USD $21.79


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Buy 5 $17.68/pack 15% Off
Buy 10 $16.64/pack 20% Off
Buy 25 $15.60/pack 25% Off
Buy 50 $14.56/pack 30% Off
Buy 100 $13.52/pack 35% Off
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Magnet Specifications

Imperial Size 0.50 x 0.50 x 0.25 Inch (Length x Width x Thickness)
Metric Size 12.7 x 12.7 x 6.35 mm (Length x Width x Thickness)
Countersunk Hole Size 0.296 x 0.17 Inches at 82°
Countersunk Hole Location Both Sides (Double Countersunk)
Screw Size #6
Material Grade N52
Pull Force 10.7 lbs
Coating Nickel-Copper-Nickel (Ni-Cu-Ni)
Magnetization Direction Thickness
Magnet Material Sintered Neodymium (NdFeB)
Tolerance +/- 0.004 Inches
Max Operating Temperature 80°C / 176°F
Flux Density (Br) 14,800 Gauss
Magnet Weight 6.7 Grams
Part Number CSB12X12X14N52-10PK
Quantity Included 10 Countersunk Block Magnets

Produced in an ISO 9001 Facility
Manufactured to Meet RoHS & REACH Standards



Installing Countersunk Magnets: Snug, Not Tight

Tighten each screw only until its head sits flush with the magnet, then stop. Neodymium is hard but brittle, so it can't flex like a steel washer. Once the screw head seats, every extra turn wedges it deeper into the countersink and can crack the magnet around the hole.

Use #6 flat-head screws. Avoid pan-head and round-head screws, which press on the thin edge of the hole.

Drive the screw by hand when you can. If you use a drill/driver, set the clutch to a low number, drive slowly, stop about one turn early and finish by hand. Don't use an impact driver or drill mode. Mount the magnet on a flat surface over a pilot hole, because a bump or glue drip underneath can crack it as you tighten.

Learn more:
How Do I Install Countersunk Magnets Without Breaking Them?
Can I Use Metric and Imperial Screws Interchangeably With Countersunk Magnets?

Dimensions are nominal; see the drawing for tolerances. STEP files open in SolidWorks, Fusion, Onshape, FreeCAD and most other CAD software.