Acorn nuts are used to cover and protect exposed threads.
Steel Acorn nuts with Zinc Plated finishes offer some corrosion resistance. For damp or wet environments choose Stainless Steel or Brass Acorn Nuts.
For some low-height Acorn nut sizes the wrench size is also reduced; allowing access in tight spaces. DIN 986 Nylon Acorn nuts have a locking nylon insert to resist loosening due to vibration. Flanged Acorn Nuts evenly distribute force over a larger area against the fastening surface.
