DS EN 4048:2005 Aerospace Series - Nuts, Self-Locking, Mj Threads, In Heat Resisting Nickel Base Alloy Ni-Ph2601 (Inconel 718), Mos[2] Coated - Classification: 1550 Mpa (At Ambient Temperature)/425 Degrees C - Technical Specification Defines the characteristics, qualification and acceptance requirements for self-locking nuts with MJ threads in NI-PH2601, MoS[2] coated, for aerospace applications.