Self Locking Hex Nut - 12x1.5mm - commonly used on drivetrain and suspension components. Prevailing torque style (not nylock). Silver zinc plating. DIN Grade 10 (US grade 8). BMW Part# for this item is 07129900047.
All of my hardware is European (no Chinese made fasteners). Sourced from Metric & Multistandard years ago. Selling off most of my personal stock.