DS EN 4072:2009 Aerospace Series - Screws, 100 Degree Countersunk Normal Head, Offset Cruciform Recess, Close Tolerance Normal Shank, Short Thread, In Titanium Alloy, Aluminium Ivd Coated - Classification: 1100 Mpa (At Ambient Temperature)/425 Degree C Defines the characteristics of screws, 100 degree countersunk normal head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, aluminium IVD coated.