SAE AS8879D
Screw Threads - Unj Profile, Inch Controlled Radius Root With Increased Minor Diameter.
Standard:
AKA:
- AS8879
- Revision: D
- 2012-11-19
- 2004-08-09
- E-25 General Standards For Aerospace And Propulsion Systems
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.
History:| Standard | Published | Revision | Status |
|---|---|---|---|
| AS8879D | 2004-08-09 | Latest | |
| AS8879C | 2003-01-15 | Historical | |
| AS8879B | 2001-08-01 | Historical | |
| AS8879A | 1999-01-01 | Historical | |
| AS8879 | 1996-10-01 | Historical |
- SAE AS 8879
- Aerospace
- Parts
- Fasteners
- Gas turbines
- Hybrid engines
- Jet engines