Product Code:SAE MA1370
Title:Screw Threads - MJ Profile, Metric
Issuing Committee:E-25 General Standards For Aerospace And Propulsion Systems
Scope:This standard specifies the characteristics of the MJ profile metric series of screw threads, altered from ISO 68 M Profile, to include a mandatory controlled radius of 0.18042P to 0.15011P at the root of the external thread and with the minor diameter of both external and internal threads increased to provide a basic thread height of 0.5625H in order to accommodate the external thread maximum root radius. The following detailed requirements are included:a. MJ basic profile and design profilesb. Standard series of diameter-pitch combinations for nominal thread diameters from 1.6 to 200 MMc. Standard thread classes and form tolerancesd. Formulae for thread dimensions and tolerancese. Method of designating MJ threadsf. Inspection requirementg. Tables for selected diameter-pitch combinations for aerospace screws, bolts, nuts, shaft and bearing retaining screw threads, and fluid fittings thread sizes.h. Tables for MJ screw threads limiting dimensions and tolerancesi. Symbols for MJ thread dimensions and tolerances