Qualfast: M16 Hex Dome Cap Nut High BZP (6) Bright zinc-plated. Used for applications, where appearance is essential. DIN 1587. MPN: M16 Hex Dome Cap Nut High BZP (6) Attributes: Box Quantity: 50 Driving Features: Hexagon Grade: 6 Material: Steel Surface Treatment: Zinc Plated Thread: Metric Thread Direction: Right Thread Size: M16