AS8879C Screw Threads - UNJ Profile, Inch Controlled Radius Root with Increased Minor Diameter
Revised
01/15/2003
- Features
- Issuing Committee
- Content
- 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:
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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.
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c
Standard thread classes and form tolerances.
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d
Formulae for thread dimensions and tolerances.
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e
Method of designating UNJ threads.
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f
Tables for selected diameter-pitch combinations for close tolerance mechanical thread applications.
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g
Tables for screw thread - UNJ profile thread limit dimensions.
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a
- Pages
- 25
- Citation
- SAE International Technical Standard, Screw Threads - UNJ Profile, Inch Controlled Radius Root with Increased Minor Diameter, SAE Standard AS8879C, Revised January 2003, Issued October 1996, https://doi.org/10.4271/AS8879C.