Product Details :

An acorn nut, also referred to as crown hex nut, blind nut, domed cap nut, or dome nut is a nut that has a domed end on one side.

An acorn nut, also referred to as crown hex nut, blind nut, domed cap nut, or dome nut is a nut that has a domed end on one side. When used together with a threaded fastener with an external male thread, the domed end encloses the external thread of the threaded fastener, either to protect the thread itself or to protect nearby objects from contact with the thread. In addition, the dome gives a more finished appearance
Dome nuts have a huge variety of uses. From being used for it's aesthetics as a cover for threaded rods and as caps for machine screws in architectural metalwork. To being used in the car modification business as an alternative to manufacturer supplied nuts and fixings
DOME Nuts are available in Mild Steel and Stainless Steel.

DIN 1587