DS EN 4509:2006 Aerospace Series - Screws, 100 Countersunk Normal Head, Offset Cruciform Recess, Threaded To Head, In Titanium Alloy, Anodized, With Aluminium Pigmented Coating, Metric Series - Classification: 1100 Mpa (At Ambient Temperature)/315 Degree C Defines the characteristics of screws, 100 degree countersunk normal head, offset cruciform recess, threaded to head, in titanium alloy, anodized, with aluminium pigmented coating, metric series.