This ((Aerospace Series. pre-standard has been drawn up under the responsibility of AECMA
(Association Européenne des Constructeurs de Matériel Aérospatial). It is published on green paper
for the needs of AECMA-Members. It has been technically approved by the experts of the concerned
Commission following comment by the Member countries.
AECMA PREN 3742-1992 history
1992AECMA PREN 3742-1992 Aerospace Series Nuts, Hexagonal, Slotted/ Castellated, Reduced Height, Reduced Across Flats, in Heat Resisting Steel, Passivated Classification : 600 MPa (at Ambient Temperature)/650 Degrees C Edition P1