3M Flange Nut 28740, 1 inch x 5/8 in-11 internal

Use a 3M™ Flange Nut to securely attach 3M™ Unitized Wheels and Depressed Center Grinding Wheels to your right angle grinder or disc sander. Designed with a flange shape on one side, this style of nut distributes pressure evenly across the inside surface of the abrasive wheel.