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SAE MA 1370A:2024-04-01
Screw Threads - MJ Profile, Metric (Stabilized: Apr 2024)
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Summary
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 profiles
- b Standard series of diameter-pitch combinations for nominal thread diameters from 1.6 to 200 mm
- c Standard thread classes and form tolerances
- d Formulae for thread dimensions and tolerances
- e Method of designating MJ threads
- f Inspection requirement
- g 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 tolerances
- i Symbols for MJ thread dimensions and tolerances
Notes
Technical characteristics
| Publisher | SAE International |
| Publication Date | 04/01/2024 |
| Page Count | 39 |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
Replaces
31/01/1990
Superseded
, Confirmed
Historical
Previous versions
01/04/2024
Active
Most Recent
31/01/1990
Superseded
, Confirmed
Historical