The acorn nut Dome Nut is a type of fastener which gets its name from its shape. Acorn nut is its common name and it is also called a crown hex nut, blind nut, cap nut or domed cap nut. It is a nut that has a domed top to cover the threads. This is to prevent contact with the external thread to protect the threads or protect other things the threads would rub against. In addition the dome gives a more finished appearance Material : SS 304 grade SS 316 grade SS 202 grade Range : · Dia: 5 mm - 30mm 532" - 1" Also Known as SS Dom Nut SS Cap Nut