DS EN 4636:2009 Aerospace Series - Screws, 100 Degree Countersunk Head, Six Lobe Recess, Short Thread, In Titanium Alloy Ti-P64001, With Aluminium Pigmented Coating - Classification: 1100 Mpa (At Ambient Temperature)/315 Degree C Defines the characteristics of screws with 100 degree countersunk head, with six lobe recess, short thread, in titanium alloy TI-P64001, aluminium pigmented coating, for aerospace applications.