DS EN 4172:2006 Aerospace Series - Lockbolts, Protruding Head, Sheartype, Close Tolerance, In Titanium Alloy Ti-P64001, Anodized, Metric Series - Classification: 1100 Mpa (At Ambient Temperature)/315 Degree C Defines the characteristics of lockbolts with protruding head, sheartype, close tolerance, in titanium alloy TI-P64001, anodized, metric series, for use in aerospace applications.