Lock nut for all M10 x 1.25p gearknobs
Ferrari Part number #108010
Used on: 206 GT Dino, 208, 246 Dino, 250, 288 GTO, 308 GT4 Dino, 308 GTB, 308 QV, 328, 348, 355, 360, 365 GT4 Berlinetta Boxer, 430, 456, 512 BB, 512 BBi, 512 TR/M, 550, 575M, 599, 612, F40, Mondial QV 3.0, Mondial QV 3.2, Mondial T 3.4, Mondial 8, Testarossa