Helical spring lock washers to DIN 127 Form B in spring steel 65Mn, zinc plated and black. M3–M24. Hardened and tempered to keep spring force under bolt preload in rail and machinery joints.
| Standard | DIN 127 Form B |
|---|---|
| Size | M3 – M24 |
| Material | Spring steel (FSt/C60), 65Mn |
| Hardness | 430–530 HV (≈ HRC 42–50) |
| Packing | Bulk carton / 5 kg box |
MOQ & lead time depend on size and finish — typical batch 15–30 days after confirmation. Mill test certificate 3.1 available on request.
