7/16 x 9/16 Inch Neodymium Rare Earth Magnetic Thumbtack N42 XLTK-BLK

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XLTK-BLK Specifications

Magnetization Direction: The direction through which the magnet is magnetized. See our Magnetization Directions page for more details.
Axial (north outer face)
Size: Size is the physical dimensions of the product using the standard unit of measure inches.

0.438 x 0.562 Inch ( Diameter x Thickness )
Metric Size: Metric size is the physical dimensions of the product in metric millimeters.

11.11 x 14.29 mm ( Diameter x Thickness )
Pull Force 1: Pull force case 1 represents a magnet attracting to a thick steel plate. Learn more about Magnet Pull Force Case 1.

7.45 lb ( kg)
Grade:
Grade N

Min: -238°F (-150°C) Max: 176°F (80°C)

Hover over grades for temp info:

N

NM

NH

NSH

NUH

NEH

NAH
N42
Max Operating Temp: Maximum operating temperature, also known as maximum service temperature, is the temperature at which the magnet may be exposed to continuously with no significant long-range instability or structural changes. Learn more in our Temperature and Neodymium Magnets article.
176°F (80°C)
Surface Field: Surface field is the magnetic field strength at the surface of the magnet as measured by a Gauss meter. Our Surface Field Table is a comprehensive table of the surface field for all of our stock magnets. Learn about magnet surface field calculations in our Surface Fields 101 article.

3220 Gauss
Material: This lists the name of the material each product is composed of.
Neodymium (NdFeb)
BH Max: BH max is the Maximum Energy Product at the point on the B/H Curve that has the most strength, expressed in MGOe (MegaGaussOersteds). When describing the grade of a neodymium magnet, this number is commonly referred to as the "N" number, as in Grade N52 magnets. Learn more about Bh max in our glossary.

42 MGOe
Coating: Most neodymium magnets are plated or coated in order to protect the magnet material from corrosion. Check out our Custom Magnets for unplated magnets and other coatings not stocked for this size magnet. Learn more about all available platings and coating in our What Magnet Coating Should I Use? article.
Nickel-Copper-Nickel (Ni-Cu-Ni)
Weight: This is the weight of a single magnet in ounces and grams. Variety packs (with mixed sizes) show the overall weight.

0.2783 oz (7.89 g)
Br Max: Br max is also called "Residual Flux Density" and is when the magnetic induction remaining in a saturated magnetic material after the magnetizing field has been removed. This is the point at which the hysteresis loop crosses the B axis at zero magnetizing force, and represents the maximum flux output from the given magnet material. By definition, this point occurs at zero air gap, and therefore cannot be seen in practical use of magnet materials. Learn more about Br max in our glossary.

13,200 Gauss
Color: The color of the coating or plating on the product.

Black

Product Description

The xltk-blk black magnetic thumbtack has a 7/16" diameter and 9/16" thickness, is magnetized through thickness and is coated with a nickel copper nickel plating providing a smooth and durable surface that helps protect the magnet from corrosion. Made from N42 grade material, this magnet has a high size to strength ratio and can handle temperatures up to 176°F (80°C).

The xltk-blk is a large, powerful magnetic thumbtack with an easy-to-grip plastic head and a strong neodymium magnet on the bottom. A single thumbtack can securely hold 15-20 sheets of 8 1/2" x 11" paper to a ferrous metal surface, making it ideal for holding notes, documents, maps, posters, large prints, presentations, and other display materials. These reusable magnetic thumbtacks are useful for homes, offices, classrooms, workshops, and other spaces with refrigerators, magnetic whiteboards, filing cabinets, steel shelving, and other ferrous surfaces. Their strong magnetic pull also makes them useful for finding studs in a wall without damaging the wall surface.

Common Applications

Reminders & Schedules - Posting reminders, schedules, and notices on refrigerators.
Whiteboards & Bulletin Boards - Organizing information on magnetic whiteboards and bulletin boards.
Photos & Artwork - Displaying photos, artwork, cards, and lightweight prints.
Maps & Planning Boards - Marking locations on magnetic maps, charts, and planning boards.
Project Management - Creating visual markers for scheduling and project management.
Classroom Displays - Posting classroom materials and educational displays.
Cabinets & Lockers - Organizing documents on steel cabinets, lockers, and shelving.
Signs & Labels - Displaying signs, labels, and promotional materials.
Home & Office Organization - Creating reusable office, home, and workshop organization systems.
Plans & Patterns - Holding patterns, plans, and reference materials on steel work surfaces.

Product Features

Easy-Grip Design - Raised thumbtack-style head makes the magnet easy to grasp, position, and remove by hand.
No Pins or Holes Required - Holds items against ferrous surfaces without piercing the item or mounting surface.
Quick to Reposition - Can be moved repeatedly as displays, notes, or organizational needs change.
Easy to Remove - The raised head provides leverage and a convenient gripping point for separating the magnet from a steel surface.
Compact Size - Provides useful magnetic holding in a small footprint without taking up excessive display or work space.
Reusable Design - Can be attached, removed, and repositioned repeatedly without disposable adhesives or fasteners.
Simple Magnetic Attachment - Installs instantly on suitable ferrous surfaces without tools, drilling, or permanent hardware.
Permanent Magnet - Remains magnetized without requiring electricity, batteries, or an external power source.
Rare Earth Neodymium Magnet - The strongest type of permanent magnet available, providing exceptional strength for its size.