SAE AS8879A
Screw Threads - UNJ Profile, Inch
Historical
Standard by SAE International, 1999-01-01
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About This Item
This SAE Aerospace Standard (AS) specifies the characteristics of the UNJ profile inch series of screw threads, to include a mandatory controlled radius of 0.18142P to 0.15011P at the root of the external thread and with a 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.
f
Acceptance 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.
Please request information about the document. Contact Page
Standard Details
- Publication Date: 1999-01-01
- Standard Status: historical
- Publisher: SAE International
- Document Type: Aerospace Standard
- Subject: Pitch, Production control, Manufacturing processes, Safety critical systems, Screws, , , ,
- Official SAE: Doi link
