MATERIAL: Alloy steel 25CD4 or 30CD4 in accordance with NF L 22-031, heat treated for 40-43 HRC.
SURFACE TREATMENT: Cadmium plate 5 µm mini in accordance with EN 2133 + dry film lubricant in accordance with EN 2491.
CLASSIFICATION: 1100 MPa (at ambient temperature) / 235 °C.
THREAD: - PROFILE: ISO M in accordance with NFL 05220.
- TOLERANCES: in accordance with NFL 05224.
TOLERANCES OF FORM AND POSITION: In accordance with ISO 8788.
MARKING: - SD in accordance with NFL 22-036 on the area indicated on the drawing.
QUALIFICATION AND ACCEPTANCE CONDITIONS: NFL 22-500.