Dated 12 November 1975, this 18-page technical guide issued by Ferrari’s Gestione Sportiva (Reparto Corse) sets out the tolerance classes and specification standards for threaded components used across Ferrari racing cars. The document systematically details ISO metric thread forms, tolerance systems and fit classifications applied to competition machinery, reflecting the rigorous engineering controls in place within the racing department during the mid-1970s.

The reverse of each sheet bears the Ferrari logo, confirming its internal factory origin. Original technical literature of this nature, produced for internal circulation within the Reparto Corse, is seldom encountered outside the factory environment and offers direct insight into Ferrari’s precision-driven approach to competition engineering.

Good condition. 29.5 x 22 cm.