Ball Joints · Front Axle
| System | Front Axle |
| Subsystem | Ball Joints |
| Assembly | Ball Joint to Transverse Arm |
| Fastener | Notched Nut |
| Thread | M45x1.5 |
| Grade | 8.8 |
| Years | 1972–1983 |
| Vehicles | 911SC, 911T/E/S |
| Confidence | Cross Referenced |
Source: Porsche 911 Workshop Manual, Section 4 (Front Axle and Steering), pages 497-498 (Tightening Torques for Front Axle and Steering); Porsche Technical Specifications (WKD 422 720, 78-81 Models, and WKD 423110, 82-83 Models), both stating 250 Nm directly