DS EN 3760:1997 Aerospace Series - Screws, 100 Degree Countersunk Normal Head, Offset Cruciform Recess, Threaded To Head, In Heat And Corrosion Resisting Steel, Passivated - Classification: 1100 Mpa (At Ambient Temperature)/425 Degree C Defines the characteristics of screws, 100 degree countersunk normal head, offset cruciform recess, threaded to head, in heat and corrosion resisting steel, passivated.