Acorn nuts are used to cover and protect exposed threads. Also known as dome nut, hexagon domed cap nut.
DIN 986 Nylon Acorn nuts have a locking nylon insert to resist loosening due to vibration.
A4 / 316 Stainless Steel fasteners are "marine grade" corrosion resistant; suitable for salt water applications. A4 fasteners also offer increased resistance to chemicals when compared with A2 stainless fasteners.
