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SCREW THREADS - UNJ PROFILE, INCH
- Aerospace Standard
- AS8879
- Issued
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
This SAE Aerospace Standard (AS) specifies the characteristics of the UNJ profile inch series of screw threads, 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:
-
a
UNJ basic profile and design profiles.
-
b
Standard series of diameter-pitch combinations for nominal thread diameters from .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.
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f
Inspection and verification requirements.
-
g
Tables for selected diameter-pitch combinations for aerospace screws, bolts, nuts, shaft and bearing retaining screw threads, fluid fittings, and other component thread sizes.
-
h
Tables for UNJ screw threads limiting dimensions and tolerances.
-
i
Symbols for UNJ thread dimensions and tolerances.
Recommended Content
| Aerospace Standard | Screw Threads - UNJ Profile, Inch Controlled Radius Root with Increased Minor Diameter |
| Aerospace Standard | Screw Threads, Metric Buttress - MJB Profile |
Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| Unnamed Dataset 1 | ||
| Unnamed Dataset 2 | ||
| TABLE 1 | Coarse Thread Series | |
| TABLE 1 | (Continued) | |
| TABLE 2 | Fine Thread Series | |
| TABLE 3 | Extra Fine Thread Series | |
| TABLE 4 | Eight Thread Series | |
| TABLE 5 | Twelve Thread Series | |
| TABLE 5 | (Continued) | |
| TABLE 6 | Sixteen Thread Series | |
| TABLE 6 | (Continued) | |
| TABLE 7 | Basic Thread Data | |
| TABLE 7 | (Continued) | |
| TABLE 8 | Special Diameter-Pitch Computations | |
| TABLE 9 | ||
| TABLE 10 |
Issuing Committee
E-25 General Standards for Aerospace and Propulsion Systems
The SAE E-25 General Standards for Aerospace & Propulsion Systems committee addresses aerospace propulsion systems and components. These systems and components include bolts, screws, nuts, washers, studs, rivets, pins, covers, O-rings, brackets, plugs and associated procurement requirements, as well as solid film lubricants and design specifications for screw threads and fastener assembly requirements.
Reference
| Number | Title |
|---|---|
| ANSI/ASME/B1.1 | This document is not part of the subscrption. |
| ANSI/ASME/B1.2 | This document is not part of the subscrption. |
| ANSI/ASME/B1.3M | This document is not part of the subscrption. |
| ANSI/ASME/B1.7M | This document is not part of the subscrption. |
| ANSI/ASME/B46.1 | This document is not part of the subscrption. |
| FED-STD-H28/1 | This document is not part of the subscrption. |
| FED-STD-H28/2 | This document is not part of the subscrption. |
| FED-STD-H28/20 | This document is not part of the subscrption. |
| FED-STD-H28/4 | This document is not part of the subscrption. |
| FED-STD-H28/6 | This document is not part of the subscrption. |
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