- Nut : Alloy steel in accordance with TR3791, heat treated for 40-43 HRC.
- Washer : Alloy steel in accordance with TR3791 heat treated for 315-360HV.
Nut and washer: Cadmium plate 5µm mini + chromating in accordance with EN 2133.LUBRICANT:
Cetyl alcohol only on the nut.CLASSIFICATION:
1100 MPa (at ambient temperature) / 235 °C.THREAD:
TOLERANCES OF FORM AND POSITION:
- PROFILE: ISO M in accordance with NFL 05220.
- TOLERANCES: in accordance with NFL 05224.
In accordance with ISO 8788.MARKING:
In accordance with EN 2424 – category F, on the area indicated on the drawing.QUALIFICATION AND ACCEPTANCE CONDITIONS:
NFL 22500. Except self-locking torque restricted to 1 reusability cycle at ambient temperature with test bolts in TA6V, 1100Mpa, IVD + cetyl alcohol.
Contact Howmet for the diameter/type in manufacturing.