Qualfast: M16 Double -End Stud Nut YK Hexagon Nuts Metric - NF (Unified National Fine Thread) Steel - Class YK End Stud Nut DIN 2510 MPN: 23660.160.001 EAN: M16 Double -End Stud Nut YK Attributes: Box Quantity: Driving Features: Hexagon Grade: YK Material: Steel Surface Treatment: Plain Thread: Metric Thread Direction: Right Thread Size: M16