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SAE AS8879 Rev D

Screw Threads - UNJ Profile, Inch Controlled Radius Root with Increased Minor Diameter
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SAE AS8879 Rev D

Screw Threads - UNJ Profile, Inch Controlled Radius Root with Increased Minor Diameter

PUBLISH DATE 2024
PAGES 25
SAE AS8879 Rev D
This SAE Aerospace Standard (AS) specifies the characteristics of screw threads - UNJ profile inch series, including a mandatory controlled radius as specified in Table 1 at the root of the external thread. The minor diameter of both external and internal threads provides a basic thread height of .5625H to accommodate the external thread maximum root radius. The following detailed design requirements are included: a Screw threads - UNJ basic profile and design profiles. b Standard series of diameter-pitch combinations for nominal thread diameters from 0.060 to 6.000 inches. c Standard thread classes and form tolerances. d Formulae for thread dimensions and tolerances. e Method of designating UNJ threads. f Tables for selected diameter-pitch combinations for close tolerance mechanical thread applications. g Tables for screw thread - UNJ profile thread limit dimensions.
SDO SAE: SAE International
Document Number AS8879
Publication Date April 5, 2024
Language en - English
Page Count 25
Revision Level D
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