[Link to PDF]
Historically, Italian standard UNI 5586 covered similar terrain. However, ISO 4755 is the modern harmonized European standard. While UNI 5586 is obsolete for new designs, many older blueprints still reference it. Always prefer UNI ISO 4755 for new projects to ensure compliance with current international trade regulations. tabella gola uni iso 4755
| Passo (Pitch) | Diametro Gola (Undercut Ø) | Larghezza (Width) | | :--- | :--- | :--- | | 0,5 mm | d - 0,2 mm | 0,8 mm | | 1,0 mm | d - 0,4 mm | 1,6 mm | | 1,5 mm | d - 0,6 mm | 2,4 mm | | 2,0 mm | d - 0,8 mm | 3,0 mm | [Link to PDF] Historically, Italian standard UNI 5586
If you were looking for a different type of groove, you might be interested in: Always prefer UNI ISO 4755 for new projects