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SAE MA1370A
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The latest, up-to-date edition.
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Screw Threads - MJ Profile, Metric
Hardcopy , PDF
English
01-04-2024
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.
DevelopmentNote |
This version is now stabilized
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DocumentType |
Standard
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Pages |
39
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ProductNote |
This version is now stabilized
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PublisherName |
SAE International
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Status |
Current
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Supersedes |
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
SAE AS1337B | Selected Aerospace Diameter Pitch Combinations of Metric 60° Screw Threads for Nuts and Bolts |
SAE MA1566B | Gaging Practice and Gage Requirements for MJ Metric Screw Threads |
ISO 68:1973 | ISO general purpose screw threads Basic profile |
SAE AS1421A | Aerospace Selected Diameter - Pitch Combinations of Metric 60° Screw Threads for Shaft or Bearing Retaining Screw Threads |
SAE AS1338A | Aerospace Metric 60° Screw Thread Profile and Tolerance Classes |
ISO 1501:2009 | ISO miniature screw threads |
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