This .Aerospace Series» pre-standard has been drawn up under the responsibility of AECMA
(Association Européenne des Constructeurs de MatérielAérospatial). It is published on green paper
for the needs ofAECMA-Members. It has been technically approvedby the experts of the concerned
AECMA Commission following comment by the Member countries.
AECMA PREN 4178-1994 history
1994AECMA PREN 4178-1994 Aerospace Series Screws, Pan Head, Six Lobe Recess, Coarse Tolerance Normal Shank, Medium Length Thread, in Titanium Alloy, Anodized, MoS2 Lubricated Classification : 1 100 MPa (at Ambient Temperature) / 315 Degrees C Edition P1
1993AECMA PREN 4178-1993 Aerospace Series Screws, Pan Head, Six Lobe Recess, Coarse Tolerance Normal Shank, Medium Length Thread, in Titanium Alloy, Anodized, MoS2 Lubricated Classification : 1 100 MPa (at Ambient Temperature) / 315 Degrees Celsius Edition P1