Description
Features:- Magnetised NORTH on countersunk face.- Pairs magnetically with matching Ø 20mm South ring magnet.- Specifically sized with countersunk hole, to be used with flat head screws.- Powerful Rare Earth (Neodymium) permanent magnet.- High gloss Nickel coating, for protection against corrosion.- Maximum operating temperature 80°C / 100°C
Dimensions: Ø 20mm (Outer diameter) x 4mm (Thickness), Ø 5.2mm (Internal countersunk hole diameter)The dimensions of the product are measured in metric units, with an approximate "tolerance" (manufacturing margin of error) of +/- 0.05mm 
Pull Strength: 5kg The approximate force (in metric units) required to remove a magnet from industry-standard 3mm thick mild steel. These "strengths" are measured using mathematical calculations, and should be used as a general guide only.
Direction of Magnetism: "Axially" magnetised (top to bottom) thru 4mm thickness. The axis through which a product is magnetised.
Gauss: 3,594 Gauss A measurement of surface "magnetic induction" (B), equal to one ten-thousandth of a Tesla. Gauss indicates the number of lines of magnetic flux per square centimetre, under the CGS metric system.
Grade: N42 In permanent magnets, the grade refers to the materials used in the production process. Material "grades" range from low end (weaker) to high end (stronger). See more about magnet grades at our Help Centre.
Order Units: Available in individual units. Bulk discounts available on orders of 1,000pcs or more.
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