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SAE MA1370 : 2018

Screw Threads - MJ Profile, Metric

Standard Details

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:aMJ basic profile and design profilesbStandard series of diameter-pitch combinations for nominal thread diameters from 1.6 to 200 mmcStandard thread classes and form tolerancesdFormulae for thread dimensions and toleranceseMethod of designating MJ threadsfInspection requirementgTables for selected diameter-pitch combinations for aerospace screws, bolts, nuts, shaft and bearing retaining screw threads, and fluid fittings thread sizeshTables for MJ screw threads limiting dimensions and tolerancesiSymbols for MJ thread dimensions and tolerances

Cross Reference: AS1337,AS1338,AS1421,AS1421A,ISO/R1501,ISO261,ISO68,ISO965/1,ISO965/3,MA1566

General Information

Status : Historical
Standard Type: Main
Document No: SAE MA1370 : 2018
Document Year: 2018
Pages: 38

Life Cycle

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SAE MA1370 : 2018
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