DS EN 4078:2009 Aerospace Series - Inserts, Threaded, Thin Wall, Locked And Self-Locking, In Heat Resisting Steel, Mos[2] Lubricated - Classification: 1100 Mpa (At Ambient Temperature)/315 Degrees C Defines the characteristics of threaded thin wall inserts, locked and with a self-locking feature achieved by deforming out-of-round the internal thread of mid length, in heat resisting steel, MoS[2]