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.

Contact Alcoa for the diameter/type in manufacturing.
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Item #

A ±0.2

B - MAX

C ±0.1

D ±0.1

H - MAX

J ±0.05

K +0.2 / +0

M - MIN

Thread

4SMR4209M N/A N/A N/A N/A N/A N/A N/A N/A N/A M4 x 0.7 – 4H5H
5SMR4209M N/A 13.400 mm N/A 10.500 mm N/A 7.000 mm N/A 5.500 mm N/A 6.200 mm N/A 5.500 mm N/A 2.500 mm N/A 2.400 mm N/A M5 x 0.8 – 4H5H
6SMR4209M N/A N/A N/A N/A N/A N/A N/A N/A N/A M6 x 1.0 – 4H5H
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