DS EN 4127:2009 Aerospace Series - Bolts, Normal Hexagonal Head, Coarse Tolerance Normal Shank, Short Thread, In Titanium Alloy, Aluminium Ivd Coated - Classification: 1100 Mpa (At Ambient Temperature)/425 Degree C Defines the characteristics of bolts, normal hexagonal head, coarse tolerance normal shank, short thread, in titanium alloy, aluminium IVD coated.