DS EN 3740:1997 Aerospace Series - Bolts, Shouldered, Thin Hexagonal Head, Close Tolerance Shank, Short Thread, In Titanium Alloy, Anodized, Mos[2] Lubricated - Classification: 1100 Mpa (At Ambient Temperature)/315 Degree C Defines the characteristics of bolts, shouldered, thin hexagonal head, close tolerance shank, short thread, in titanium alloy, anodized, MoS[2] lubricated.