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1/2 × 1/4 × 1/8 Inch Ring/Donut Magnets N52
$19.49$0.97 each
Donut magnets and magnets with holes
Ring Magnets and Other Magnets with a Hole
Ring magnets are round neodymium magnets with a hole through the center, so they slide over a shaft, pin or bolt. Need a flush screw mount instead? Choose a countersunk ring. Most orders placed by 1 PM MT ship the same day from Denver, Colorado.
- Most orders ship same day when placed by 1 PM MT
- Free U.S. shipping on every order
- 30-day returns, no restocking fees
- 25 million+ magnets in stock in Denver, Colorado
Ring Magnet Types
What goes through the hole decides the style.
Most popular
Ring Magnets
Straight center hole for shafts, pins and bolts. Outside diameters from 3/16 to 2 Inch.
Screw mount
Countersunk Ring Magnets
Tapered hole for a flat-head screw, so the screw head sits flush. #2 to #10 screws.
Pot (Cup) Mounting Magnets
Ring magnet in a steel cup that focuses the pull on one face.
For product makers
MagSafe Magnets
54 × 46 mm N52 ring assemblies with alignment magnet, plus steel rings.
Popular Ring Sizes
Read ring sizes as outside diameter × inside diameter × thickness.
3/4 × 1/4 × 1/4 Inch Ring Magnets N52
$24.99$4.17 each
1/2 × 1/4 × 1/4 Inch Ring/Donut Magnets N42
$17.49Regular price $18.49$1.46 each
1/4 × 1/8 × 1/4 Inch Ring/Donut Magnets N52
$23.49Regular price $24.49$0.65 each
Ring Magnets by Application
Where a hole through the middle helps.
Bolted fixtures and axlesSlide a ring over a bolt, pin or axle and secure it with a washer.Ring magnets
Cabinet and furniture catchesCountersunk rings screw in flush with the surface.Read the guide
Phone cases and mountsMagSafe-compatible rings for accessory products.MagSafe magnets
Science and demonstrationsRings show field lines and stack on a pencil or dowel.Read the guide
Not Sure Which Ring You Need?
Filter stocked rings by outside diameter, inside diameter and thickness, or size a magnet to your load.
Rings for Your Product Line?
- Volume pricing on eligible listings, from 5% off at 2 packs to 35% off at 100 packs
- Quotes by email within 24 to 48 hours for larger or recurring orders
- Purchase orders and NET 30 terms on approved credit
Questions
Ring Magnet Questions
Straight answers from our team in Denver, Colorado.
What is a ring magnet?
A ring magnet is a round neodymium magnet with a hole through the center. It slides over a shaft, pin or bolt. Our stock rings are magnetized axially, with north on one flat face and south on the other.
What does OD × ID × T mean?
Ring sizes list the outside diameter, the inside diameter of the hole, then the thickness. A 1/2 × 1/4 × 1/8 Inch ring is 1/2 Inch across with a 1/4 Inch hole and is 1/8 Inch thick.
What is the difference between a ring magnet and a countersunk ring?
A ring magnet has a straight hole. A countersunk ring has a tapered hole that matches a flat-head screw, so the screw sits flush. Shop countersunk rings.
Can I drill a hole in a neodymium magnet?
We don’t recommend it. Neodymium magnets are hard and brittle, and drilling can crack the magnet or ruin its coating. Buy a ring or countersunk magnet with the hole already made. Why not to drill magnets.
Do you sell MagSafe-compatible magnets for product makers?
Yes. We stock 54 × 46 mm N52 ring assemblies with an alignment magnet in 1.5 and 2.5 mm thicknesses, plus steel rings for the accessory side. Larger runs are quoted by email. MagSafe magnet instructions.
Shop Related Magnet Types
Every hub links to the next shape or mounting style.
