AS8879C Screw Threads - UNJ Profile, Inch Controlled Radius Root with Increased Minor Diameter

Revised

01/15/2003

Features
Issuing Committee
Scope
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:
  1. a
    Screw threads - UNJ basic profile and design profiles.
  2. b
    Standard series of diameter-pitch combinations for nominal thread diameters from 0.060 to 6.000 inches.
  3. c
    Standard thread classes and form tolerances.
  4. d
    Formulae for thread dimensions and tolerances.
  5. e
    Method of designating UNJ threads.
  6. f
    Tables for selected diameter-pitch combinations for close tolerance mechanical thread applications.
  7. g
    Tables for screw thread - UNJ profile thread limit dimensions.
Meta TagsDetails
DOI
https://doi.org/10.4271/AS8879C
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.
Additional Details
Publisher
Published
Jan 15, 2003
Product Code
AS8879C
Content Type
Technical Standard
Status
Revised
Language
English

Revisions