MATERIAL: Alloy steel 25CD4 or 35CD4 or equivalent, heat treated for 44 HRC.max.

SURFACE TREATMENT: Cadmium plate 5µm mini in accordance with EN 2133 + Dry Film Lubricant in accordance with EN 2491.

CLASSIFICATION: 900 MPa (at ambient temperature) / 235 °C.

THREAD:
  • PROFILE: ISO M in accordance with NFL 05-220 or AICMA 0501A.
  • TOLERANCES: in accordance with NFL 05-224 or AICMA 2011A.
TOLERANCES OF FORM AND POSITION: In accordance with ISO 8788.

MARKING: - SD in accordance with NF L 22-036 on the area indicated on the drawing.

QUALIFICATION AND ACCEPTANCE CONDITIONS: NFL 22-500 or AICMA 2053.

OPTION : Metal cap : Add code B after the type of the nut (ex. : 6GMB109M).

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

A ±0.2

B -0 / -0.2

C ±0.1

D ±0.05

H ±0.15

K +0.2 / +0

P - MAX

R - REF

Thread

4 GM 109 M N/A 17.000 mm N/A 8.000 mm N/A 6.000 mm N/A 5.000 mm N/A 5.200 mm N/A 2.500 mm N/A 5.500 mm N/A 2.500 mm N/A M4 x 0.7 – 4H5H
5 GM 109 M N/A 19.000 mm N/A 9.000 mm N/A 7.000 mm N/A 6.000 mm N/A 6.200 mm N/A 2.500 mm N/A 6.500 mm N/A 2.500 mm N/A M5 x 0.8 – 4H5H
6 GM 109 M N/A 22.000 mm N/A 10.000 mm N/A 8.000 mm N/A 6.950 mm N/A 7.100 mm N/A 2.500 mm N/A 7.500 mm N/A 3.000 mm N/A M6 x 1.0 – 4H5H
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