Questions and Answers for Master Magnet 3/8 in. Neodymium Rare-Earth Magnet Discs (12 per Pack)

A:  The inner diameter of the center hole is .125 inches.

A:  3/32 or 2.3mm, good luck with you project.

A:  2 mm.

A:  Only available online when I purchased them.

A:  They are located in the hardware dept.

A:  If you look online the location in the store is displayed on the top left of the second page. If there is no location, it's hanging on an end cap. Most stores have them near hardware.

A:  Yes

A:  Hi, MandaM. No, they will rust if left out in the (wet) weather. Applying a coat of quality paint will prevent it so long as its not scratched, or worn off. Hope this helps, Smitty.

A:  They are waterproof and work in weather. They have a maximum operating temperature of 176 degrees F/80 degrees C and are stronger as the temperature gets colder with a approximate operating temperature of -202 degrees F/-130 degrees C.

A:  No, they are not weatherproof. After a while, the elements WILL start to negatively affect them and weaken their structure. I wouldn't use them for anything you intend to have outside all the time.

A:  These are a semi-metallic rare earth, so rain/wind/cold won't affect them. Direct sunlight and high heat over long periods can weaken them over time.

A:  Yes

A:  They are axial; the poles are on the flat faces. I don't know if the pull force is increased by stacking them; I don't have a strain gauge.

A:  1) Neodymium Rare Earth Cylindrical Magnet Diametrically Magnetized. 2) When you stack two identical permanent magnets, you get roughly the strength of one twice the size. However, a magnet twice the size has to spread its magnetic energy over twice the volume, so the surface strength of the magnet is rarely significantly increased. Good luck

A:  These are axially magnetized so they are magnetized through the thickness and not the diameter. When you stack them together they will be stronger than one by itself, however they will not be 2x as strong.

A:  Inside diameter is 1/8". A #6 machine screw will not fit through the hole. I had to file down the screw threads slightly until it fit through the hole.

A:  2 mm

A:  2 mm.

A:  Yes

A:  I think what you're asking is whether the forces between magnetic domains push them toward pointing opposite ways. That actually depends on whether the domains are side-by-side or end-to-end. If you picture the domains as little arrows pointing up or down, side-by-side ones tend to point opposite directions but end-to-end ones tend to line up the same way. Think of it this way. If you have two bar magnets, each has a North pole and a South pole. If the two magnets have their two N poles pointing up then when they are side by side they will repel each other but when they are head-to-tail they will attract. In the other case when one has a N pole pointing up and the other has a S pole pointing up then they will attract each other when they are side by side but repel when they are head-to-tail.

A:  Yes.

A:  Yes

A:  Yes they will. They will support 1.5 pounds each (e.g; magnet to ferrous metal). If combined they will support slightly over that (e.g; magnet to magnet).

A:  Yes

A:  Oh Yes

A:  Yes

A:  Yes, magnets will attract and cling to each other.

A:  No, you will a need a stronger magnet or you can buy an enhanced stud finder, called a deep sensor type, that'll go through the density of the ceramic and locate those wall studs.

A:  No

A:  Sorry, but no. They do not have that much strength.

A:  If there are screws or nails in the studs, you probably will be able to find them with this. Tie a thread to it and slowly move closely it across the wall. You may need to make passes at different levels.