No special tools are required to fasten these insert nuts. Just screw a fastener into the center of the nut. Good for blind holes.
Get a secure hold, seal out moisture, and insulate against vibration and electrical conductivity with these well nuts. They consist of a brass machine nut with a rubber sleeve that expands as they are fastened for a tight grip and seal.
Create threads in thin or brittle material with these jack nuts. When tightened, the body of the nut buckles and pulls up against the underside of the mounting surface for a secure hold.