The ACORN NUT STAINLESS 5/16"-18 is crafted from high-quality stainless steel, providing excellent resistance to corrosion and rust. With a 5/16" diameter and coarse thread, this nut is ideal for securing various automotive and industrial applications where durability is essential. Its acorn shape offers a finished appearance while preventing accidental loosening. Perfect for use in outdoor environments or any application that demands reliable fastening solutions.