标准名称：	高压配电装置设计技术规定
中标分类：	电工 >> 输变电设备 >> 输变电设备综合
替代情况：	替代SDJ 5-1979;被SL 311-2004;DL/T 5352-2006;DL/T 5396-2007代替
发布日期：	1900-01-01
实施日期：	2003-10-01
首发日期：	1900-01-01
作废日期：	2008-06-01
出版日期：	1900-01-01
页数：	17页

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Product Code:SAE AS8879
Title:Screw Threads - UNJ Profile, Inch
Issuing Committee:E-25 General Standards For Aerospace And Propulsion Systems
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 nomral 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. 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; and i. symbols for UNJ thread dimensions and tolerances.