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MATERIAL:
  • Nut: Alloy steel 30CD4 or 35CD4 in accordance with TR 3791, heat treated for 40-43 HRC.
  • Washer: Alloy steel 25CD4 or 30CD4 in accordance with TR 3791, heat treated for 315-350HV/5.
SURFACE TREATMENT:
  • Nut: Cadmium plate in accordance with EN 2133 class B + Dry film lubricant in accordance with EN 2491.
  • Washer: Cadmium plate in accordance with EN 2133 class B.
CLASSIFICATION: 1100 MPa (at room 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 22036 on the area indicated on the drawing.

QUALIFICATION AND ACCEPTANCE CONDITIONS: NF L 22-500.

Contact Howmet for the diameter/type in manufacturing.
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B - MIN

C - MIN

E

L - MAX

P - MAX

S - MIN

W - NOM

W - TOL.

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