- The class 129 alloy steel socket cap screw has a black finish and a flat head with an internal hex drive
- Class 129 alloy steel is used in applications where strength is the primary consideration
| Type | Cap Screw |
| Style | Flat Head Socket |
| Size | M3-.50 |
| Length | 20 mm |
| Material | Steel |
| Grade/Class | 12.9 |
| Thread | Coarse |
| Head Style | Flat |
| Drive Type | Socket |
| Din No. | DIN 7991 |
| Tensile Strength | 1,220 MPA |
