Arvid Nilsson 18010000 is a DIN 985 self-locking hexagon nut in M10 thread manufactured from A4-80 acid-resistant stainless steel with a wax finish. The integrated nylon insert provides vibration-resistant clamping without deforming the mating thread, allowing repeated re-use. Typical applications include marine, offshore and outdoor structural fasteners where high-strength corrosion resistance is required.