DS EN 4501:2006 Aerospace Series - Bolts, Normal Hexagonal Head, Close Tolerance Normal Shank, Short Thread, In Titanium Alloy, Anodized, With Aluminium Pigmented Coating, Metric Series - Classification: 1100 Mpa (At Ambient Temperature)/315 Degree C Defines the characteristics of bolts, normal hexagonal head, close tolerance normal shank, short thread, in titanium alloy, anodized, with aluminium pigmented coating, metric series.